Re: [Aus-soaring] slip in thermals?

[Anthony Smith]

The magnification of the sideslip angle effect is to do with the shape of
the fuselage / canopy and the airflow around it. It has nothing to do with
the boundary layer.  The effect will taper off as you get further from the
fuselage but will still be noticeable out to a fuselage diameter or so away
from the fuselage surface.

 

The same effect applies to the angle of attack probes on larger aircraft.
These are all calibrated for their position on the fuselage and the
calibration factor typically ranges from 1.6 up to 2.

 

Regards

 

Anthony

 

From: Mike Borgelt [mailto:mborg...@borgeltinstruments.com] 
Sent: Thursday, 17 January 2019 10:26 AM
To: Discussion of issues relating to Soaring in Australia.

Subject: Re: [Aus-soaring] slip in thermals?

 

Yes, I've seen that article, Erich.

A couple of months ago we ran a flight test of the theory that the string in
the boundary layer amplified the actual sideslip. Taped a bent paperclip
with a second string 25mm above the normal one.
The boundary layer a couple of feet from the nose is quite thin so this
should have got it outside the layer. 
Nope. Strings seemed to move together.

Need to do this again with several strings at different heights. The flow
disturbance may extend much further from the surface of the nose.

Mike


At 09:36 AM 1/17/2019, you wrote:



Hello Mike,
is this article useful?
http://www.wisoar.org/Documents/Holighaus%20-%20Thermalling%20Efficiency.pdf

ta
Erich


On Thu, 17 Jan 2019 at 07:16, Mike Borgelt < mborg...@borgeltinstruments.com
 > wrote:

When circling in a thermal, do you 

a) keep the string centered

b) fly with it pointing to the outside of the turn

c) why?



Your technique may not be doing what you think it is.

Mike







Borgelt Instruments - design & manufacture of quality soaring
instrumentation since 1978

www.borgeltinstruments.com  


tel:Â Â  07 4635 5784Â Â Â Â Â overseas: int+61-7-4635 5784

mob: 042835 5784Â Â Â Â Â Â Â Â  Â Â Â Â Â Â Â Â :Â  int+61-42835 5784

P O Box 4607, Toowoomba East, QLD 4350, Australia 

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instrumentation since 1978
www.borgeltinstruments.com  
tel:   07 4635 5784 overseas: int+61-7-4635 5784
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P O Box 4607, Toowoomba East, QLD 4350, Australia 

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[Aus-soaring] DI Training Videos

[Anthony Smith]

FYI

 

Advice from Justin Couch and the Airworthiness team.

After quite a few months of work, we have officially released the DI
training video series.

Here's the playlist for the first 5 videos on Youtube.

 

 
https://www.youtube.com/playlist?list=PLiLxhTGv3bjiPyZAWK1ICSC9yLf1cVA6a


Also available via the GFA web page, click on the VIDEOS menu at the top of
the home page.   www.glidingaustralia.org



Please share these with your club members and maintenance group so they can
be used to train your new students. While this is all currently online, we
have plans to put it all together on a USB stick and send them around to the
clubs too, for those that can't access the internet when doing training.
There's two more videos coming in the next year. One of those will be Daily
Inspection of motors portion of the motorglider and the other is being
debated. It will probably be something in the Annual Inspection process. 

 

 

Regards

 

Anthony

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[Aus-soaring] New storm video from Mike Olbinski

[Anthony Smith]

Teal spotted it first. I haven't seen it come up on the list yet...

Lots of exciting and energetic weather:

https://vimeo.com/239593389 

Anthony

-Original Message-
From: augc-people-boun...@lists.internode.on.net
[mailto:augc-people-boun...@lists.internode.on.net] On Behalf Of Teal
Sent: Tuesday, 24 October 2017 8:40 PM
To: augc-peo...@lists.internode.on.net
Subject: [Augc-people] New storm video from Mike Olbinski

Brand new and just uploaded this evening; quite possibly his best storm
chaser movie yet.  Do yourself a favour and check it out. It's absolutely
gorgeous! https://vimeo.com/239593389

Teal


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Re: [Aus-soaring] Parachute

[Anthony Smith]

I do recall a day where I was giving a brief to an advanced trainee at a
regatta.  We were going for a run around the set course for the day in the
Bergfalke as a coaching flight.  I went through the lot: how to wear the
chute, how to get out of the aircraft in an emergency, how to deploy the
chute, how to land and what to do after you are back on the ground.

Part way through the brief I had attracted a small crowd of onlookers.

At the end of the brief one of the onlookers said "Wow, no one has ever told
me that before!"

He was wearing an expensive seat cushion.

Anthony

-Original Message-
From: Aus-soaring [mailto:aus-soaring-boun...@lists.base64.com.au] On Behalf
Of DMcD
Sent: Wednesday, 25 October 2017 8:20 PM
To: Discussion of issues relating to Soaring in Australia.

Subject: Re: [Aus-soaring] Parachute

>>Do you mind if i forward your comments to Mr Nigel Brennan who re packed
and inspected the chute??

Forward away. There's nothing much new or controversial in the comments. The
last paragraphs are quotes from others. This is not meant as a personal
comment about the parachute you are selling, it's a general comment about
our attitude to parachutes.

While repacking some hang glider parachutes with a friend, a professor in
fact, I was unable to throw his chute. His comment was 'it doesn't matter, I
have absolutely no intention of throwing my chute.'

Under those circumstances, it doesn't matter what parachute you carry or
even, if like some hang glider pilots, you have a brick wrapped up in a
towel in your parachute bag to pass an inspection. But if you want the
parachute to open when you need it, then take every care.

Paraglider people frequently throw a reserve parachute for practice.
They also use them a lot. Hang glider people also practice throwing chutes,
though not normally while flying. Both are told to rehearse their deployment
routine on every flight, as soon as the glider is airborne and stable. What
do we do in gliding? I think none of the above.

I went to a parachute clinic some time ago. I thought it was to teach
repacking. It began at 2 and finished after midnight and there were plenty
of topics still to discuss. The repacking part took only 30 minutes or so.
That was the easy part.

If a rigger says that a chute is fine to use, fine but being a sceptic, I
would take a broad range of opinions and if I wanted to use a canopy in
anger, make sure it was not 25 years old!

D
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[Aus-soaring] Aircraft Plywood

[Anthony Smith]

One for the vintage types (and sorry if I have requested this previously)

 

Where are people getting their aircraft grade plywood from?

 

My stash is nearly exhausted and I am considering ordering a bulk quantity
from Germany.  

 

If anyone would like to join in with the purchase to share the shipping
costs, then please let me know.

 

Regards

 

Anthony 

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Re: [Aus-soaring] American Soaring Symposia

[Anthony Smith]

Part of the Wil Schumann paper is here:

 

http://www.betsybyars.com/guy/soaring_symposia/72-modif.html 

 

From: Aus-soaring [mailto:aus-soaring-boun...@lists.base64.com.au] On Behalf Of 
Ron Sanders
Sent: Sunday, 27 August 2017 6:22 PM
To: Gliding Australia Forum ; Discussion of 
issues relating to Soaring in Australia. 
Subject: [Aus-soaring] American Soaring Symposia

 

Any body got any idea where is can get any of these publications from  the 
seventies??

Wil Schumann did a clean up of a libelle that i would like to read about again.

 

Ron

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[Aus-soaring] Technical Bulletin No 58 for SZD-9bis "Bocian"

[Anthony Smith]

A long shot. Does anyone happen to have a copy of Technical Bulletin No
58 for SZD-9bis "Bocian".  Issued in 1967?

 

If so, could they please send a scan to dc...@glidingaustralia.org ?

 

Alternatively I will contact http://www.szdjezow.com.pl/ 

 

regards

 

Anthony

 

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[Aus-soaring] Another storm chaser movie

[Anthony Smith]

Another time lapse storm movie from Mike Oblinski for those interested

 

https://vimeo.com/226958858 

 

Anthony

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[Aus-soaring] Undulatus Asperatus Cloud Video

[Anthony Smith]

Another short video from Mike Olbinski who is a US storm chaser doing time
lapse movies. https://www.youtube.com/watch?v=rq3lqckbt_E  

 

Best watched at high resolution.

 

Anthony

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Re: [Aus-soaring] Air brake handles

[Anthony Smith]

I have used some from

https://www.minibearings.com.au/store/categories/knobs+ball+categories/ 

Anthony

-Original Message-
From: Aus-soaring [mailto:aus-soaring-boun...@lists.base64.com.au] On Behalf
Of Bob Ward
Sent: Sunday, 4 June 2017 7:08 PM
To: Discussion of issues relating to Soaring in Australia.

Subject: Re: [Aus-soaring] Air brake handles

Tom,

Airbrake handles are no problem, as blue bicycle grip s will do the job.
Available from any bicycle retailer.  Trim knobs? A little more difficult,
unless you can describe the shape of the original.
Typically, these control knobs have a 6 mm internal thread which is a metal
insert into the plastic grip Any handy person with access to a lathe could
produce such an insert, which would then be epoxied into a suitable knob.
such as a green plastic ball. I think that most commercial glider facilities
would have expertise to the skills require for the fabrication of a trim
knob. I hope this helps you.
What I have described applieS to a glass fibre gliderS. IF YOU NEED HANDLES
FOR OLDER STEEL TUBE FUSELAGES, THEN PLEASE GET BACK TO ME OFF LINE.

regards
Bob Ward

-Original Message-
From: Tom Wilksch
Sent: Sunday, June 04, 2017 5:54 PM
To: Discussion of issues relating to Soaring in Australia.
Subject: [Aus-soaring] Air brake handles

Afternoon all

Could anybody advise a good place to purchase things like airbrake handles
and trim knobs?

Thanks

Tom W

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Re: [Aus-soaring] Oratex UL600

[Anthony Smith]

Redmond Quinn and Adelaide Uni GC are covering an ASK-13 in the Oratex 600 / 
6000 material at the moment.

 

To my knowledge there is not an agent in Oz.  Redmond / AUGC ordered direct 
from manufacturer.

 

Redmond did a UV exposure trial for 12 months at Stonefield followed by a 
tensile test.

 

I am considering using it on the Bergfalke in due course.

 

Anthony

 

From: Aus-soaring [mailto:aus-soaring-boun...@lists.base64.com.au] On Behalf Of 
Peter Champness
Sent: Wednesday, 15 March 2017 3:42 PM
To: Discussion of issues relating to Soaring in Australia. 

Subject: [Aus-soaring] Oratex UL600

 

Has any one tried this covering material?

 

IS there an agent in Australia?

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Re: [Aus-soaring] Fwd: Re: Voltage drop

[Anthony Smith]

The RAAF spent a lot of time and money on removing the Kapton wiring out of the 
P-3 fleet.

 

Kapton was a popular aircraft wiring.  It was a lot lighter than other wiring 
(low density insulator).  It doesn’t age well though and seemed to have a habit 
of breaking down from the inside of the insulator to the outside.

 

Worst story I heard was people raiding the scrap bins for the stuff to use on 
their own projects at home.

 

Anthony

 

From: Aus-soaring [mailto:aus-soaring-boun...@lists.base64.com.au] On Behalf Of 
Ian Mc Phee
Sent: Monday, 6 March 2017 9:14 PM
To: Discussion of issues relating to Soaring in Australia. 

Subject: [Aus-soaring] Fwd: Re: Voltage drop

 

I meant to say since the crash on TWA flight 800 off New York and Swissair 
flight 111 off Canada think 1996 both caused by wiring issues all passenger 
aircraft in world were rewired with quality Aviation wire with different 
voltage wires bundled separately and all non flammable insulation.  A huge leap 
forward in airline safety. 

 

Simple - use the same in your glider. 

 

Ian McPhee 

0428847642 

Box 657 Byron Bay NSW 2481 

PS thanks Gary and Bernard for comments. 

 

 

 

-- Forwarded message --
From: "Future Aviation Pty. Ltd."  >
Date: 6 Mar 2017 7:20 am
Subject: Re: [Aus-soaring] Voltage drop
To: "Discussion of issues relating to Soaring in Australia." 
 >
Cc: 



Thanks, Ian - a very useful contribution!

 

Kind regards

 

Bernard 

 

 

On 5 Mar 2017, at 10:58 pm, Ian Mc Phee  > wrote:

 

I like 18gauge aviation wire for single seaters and prefer 16gauge for 2 
seaters so guess rear fin battery may need 14gauge..  Fuse quality can also 
cause voltage drop and in rare occasions switches.   With 3 batteries I like a 
C 7211 switch which you can call ON ON ON a 3 position switch. 

 

Personally I would look for 0.2 volts maybe 0.3 volts drop when transmit 
between volts at battery and volts at instrument panel.  A few years ago there 
was a German factory wired glider had 1volt drop between battery and panel and 
it had its battery at the base of the panel so very short wire run. The owner 
was shocked

 

Re aerial wire I like RG400 rather than the more usual RG58 but it is 
expensive.  Regretfully when a glider gets a broken back on several occasions 
the coax is stretched considerably. .  The coax is repaired but the SWR is not 
checked 

 

Ian McPhee 

0428847642   

Box 657 Byron Bay NSW 2481 

 

On 5 Mar 2017 1:13 pm, "Mike Borgelt"  > wrote:

Well you can size the wiring properly by referring to the tables in AC43.

Nobody here seems to know what reference the German glider manufacturers use, 
if any. Bernard could presumably just ask Schleichers.

In any case, just measure at the battery terminals and at the instrument with 
the same load.  As Bob Dircks says, there can be drop in switches, connectors  
and fuses.

In any case what matters operationally is what voltage appears at the 
instrument because that is what will stop it working when it gets too low. So 
I'd just set the offset to zero.

I've seen too many dodgy wiring installations. If you have to wiggle the 
connector to get it to work it is no good and probably won't work for long.

In one memorable instance about 20 years ago a club had some vario problems. 
After investigating they found 12 volts at the battery and 8 volts at the 
instrument.

After re-wiring they let me know that everything now worked fine, including the 
radio which hadn't been working properly SINCE THE FIRE DOWN THE BACK 18 MONTHS 
BEFORE.

Mike









At 11:38 AM 3/5/2017, you wrote:



naturally the germans involved would...ask a silly question, even a rhetoric 
one.



On 5 Mar 2017, at 11:58 AM, Mike Borgelt < mborg...@borgeltinstruments.com 
 > wrote:




Refer to AC43 but measure anyway.

Who knows what the German glider manufacturers do with wiring.

Mike

At 10:52 AM 3/5/2017, you wrote:



Hi Bob

Many thanks for your quick reply.
I realise that the size of the wiring comes into it but I was working on the 
assumption that 
the electronic specialists amongst us would know what wiring the manufacturers 
usually 
use for this applications. 

BTW, I’m not blaming the wiring, I just need to arrive at a realistic figure 
for the offset in 
my LX 9000.

Kind regards

Bernard 





On 5 Mar 2017, at 11:11 am, Bob Dircks  > wrote:

In order to calculate the voltage drop, we would need to know the exact 
conductor size of the wiring.
Of course the circuit is actually going to be 22m in length.
You can (fairly) easily measure the voltage drop with a 

Re: [Aus-soaring] accommodation available Benalla for World Comps

[Anthony Smith]

Hi All

 

Apparently the latest news is that a GFA card is now all that you need to
get access.

 

Allegedly a lot of dogs, complete with photos were issued with ID's???

 

Anthony

 

From: Aus-soaring [mailto:aus-soaring-boun...@lists.base64.com.au] On Behalf
Of Mike Borgelt
Sent: Wednesday, 4 January 2017 11:07 AM
To: Discussion of issues relating to Soaring in Australia.

Subject: Re: [Aus-soaring] accommodation available Benalla for World Comps

 

Anthony,

Are there different levels of access? Many of us already have ASICs.
Any word on where this database goes after the contest?  
Vicpol? The folks who couldn't be bothered taking the complaint from the
tradie after he stopped someone from burning down a servo because there was
no damage and nobody was hurt.

Mike




At 09:31 AM 1/4/2017, you wrote:



Content-Type: multipart/alternative;
 boundary="=_NextPart_000_0033_01D26671.92BF16A0"
Content-Language: en-au

The security pass form is not immediately obvious.   Allegedly it was a last
minute requirement from the Benalla Council and Victoria Police.
 
I filled in the form and submitted the passport style photo here:
 
http://www.worldgliding2017.com.au/index.php/registration-form-all-types 
 
It has already been pointed out about the lack of categories for
non-participants.
 
I understand that this is necessary to gain access to 'airside'.
 
Anthony
 
From: Aus-soaring [ mailto:aus-soaring-boun...@lists.base64.com.au
 ] On Behalf Of Mike Borgelt
Sent: Wednesday, 4 January 2017 9:12 AM
To: Discussion of issues relating to Soaring in Australia.
 >
Subject: Re: [Aus-soaring] accommodation available Benalla for World Comps
 
OK so where's the link so you can get one? I tried the website, can't find
it.

Mike



At 08:13 AM 1/4/2017, you wrote:

Content-Language: en-AU

Content-Type: multipart/alternative;

 
boundary="_000_SG2PR04MB16788BDAB4BCDFED4A9C94F8A26E0SG2PR04MB1678apcp_"

Security passes, it's pretty standard at a WGC - I've been to three & have
three at home. Naturally helps with many things, more so for the gliding
people & the locals (police too) - there's a lot of strange people in town,
allows others to identify who's there for the gliding & who's there for what
ever other reason..!

Good for the local businesses too to see that the WGC people are spending in
their town & being rewarded for their possible sponsorship. 



Cheers,

WPP




On 4 Jan. 2017, at 06:59, Mike Borgelt < mborg...@borgeltinstruments.com
 > wrote:



What's the story on security passes?



Mike

At 07:36 AM 1/4/2017, you wrote:

Content-Type: multipart/alternative;

 boundary="=_NextPart_000_000A_01D26665.B275CB80"

Content-Language: en-au

Hi Jo

We plan to arrive about 6 or 7pm Friday after landing at Wangaratta and
getting a rental car.

We are staying at the Comfort Inn.

I am not sure about the evening dinner, so we?ll see when we get there.

Hope that our security passes will be ready. I got the automatic email
response, but have heard nothing more.

Regards

Pam

 

 

From: Aus-soaring [ mailto:aus-soaring-boun...@lists.base64.com.au] On
Behalf Of Jo Pocklington

Sent: Wednesday, 4 January 2017 7:47 AM

To: 'Discussion of issues relating to Soaring in Australia.' <
aus-soaring@lists.base64.com.au  >

Subject: [Aus-soaring] accommodation available Benalla for World Comps

 

Anyone needing accommodation during the World Comps at Benalla, contact Jane
Rushworth   janerushwo...@westnet.com   

 

 

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Borgelt Instruments - design & manufacture of quality soaring
instrumentation since 1978

www.borgeltinstruments.com  

tel:   07 4635 5784 overseas: int+61-7-4635 5784

mob: 042835 5784 :  int+61-42835 5784

P O Box 4607, Toowoomba East, QLD 4350, Australia 

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Borgelt Instruments - design & manufacture of quality soaring
instrumentation since 1978
www.borgeltinstruments.com  
tel:   07 4635 5784 overseas: int+61-7-4635 5784
mob: 042835 5784 :  int+61-42835 5784
P O Box 4607, Toowoomba East, QLD 4350, Australia 

[Aus-soaring] Another storm movie

[Anthony Smith]

Another thunder storm / tornado movie by Mike Olbinski.  This time in black
and white.

 

https://vimeo.com/197854878

 

Anthony

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Re: [Aus-soaring] accommodation available Benalla for World Comps

[Anthony Smith]

I doubt it.

 

The late great John Ashford was the Australian representative for OSTIV.

 

I am not aware of a replacement decision as yet.  I believe Murray Stimson
(I haven't met him) has been named as a potential replacement.  I stuck my
hand up as well.

 

I can attempt to video the presentations and then put them onto YouTube, but
that is the limit of my abilities in that area.

 

Anthony

 

From: Aus-soaring [mailto:aus-soaring-boun...@lists.base64.com.au] On Behalf
Of Mike Borgelt
Sent: Wednesday, 4 January 2017 2:22 PM
To: Discussion of issues relating to Soaring in Australia.

Subject: Re: [Aus-soaring] accommodation available Benalla for World Comps

 

Thanks , Anthony.

I don't suppose anyone thought to livestream the OSTIV sessions? Record
audio for later podcast?

Mike



At 11:09 AM 1/4/2017, you wrote:



Content-Type: multipart/alternative;
 boundary="=_NextPart_000_0008_01D2667F.47125830"
Content-Language: en-au

Mike
 
I honestly don't know.  I am not involved in the organisation of the event.
I just jumped through the hoops to get access.
 
I have heard a bit through the grape vine but, as always with the grapevine,
there may be some mistruth in what is going around.
 
I suspect the saying about fighting the alligators when draining the swamp
is pretty true for the organisers right now.
 
Anthony
 
 
From: Aus-soaring [ mailto:aus-soaring-boun...@lists.base64.com.au
 ] On Behalf Of Mike Borgelt
Sent: Wednesday, 4 January 2017 11:07 AM
To: Discussion of issues relating to Soaring in Australia.
 >
Subject: Re: [Aus-soaring] accommodation available Benalla for World Comps
 
Anthony,

Are there different levels of access? Many of us already have ASICs.
Any word on where this database goes after the contest?  
Vicpol? The folks who couldn't be bothered taking the complaint from the
tradie after he stopped someone from burning down a servo because there was
no damage and nobody was hurt.

Mike




At 09:31 AM 1/4/2017, you wrote:

Content-Type: multipart/alternative;

 boundary="=_NextPart_000_0033_01D26671.92BF16A0"

Content-Language: en-au

The security pass form is not immediately obvious.   Allegedly it was a last
minute requirement from the Benalla Council and Victoria Police.

 

I filled in the form and submitted the passport style photo here:

 

http://www.worldgliding2017.com.au/index.php/registration-form-all-types 

 

It has already been pointed out about the lack of categories for
non-participants.

 

I understand that this is necessary to gain access to 'airside'.

 

Anthony

 

From: Aus-soaring [  
mailto:aus-soaring-boun...@lists.base64.com.au] On Behalf Of Mike Borgelt

Sent: Wednesday, 4 January 2017 9:12 AM

To: Discussion of issues relating to Soaring in Australia. <
aus-soaring@lists.base64.com.au  >

Subject: Re: [Aus-soaring] accommodation available Benalla for World Comps

 

OK so where's the link so you can get one? I tried the website, can't find
it.

Mike




At 08:13 AM 1/4/2017, you wrote:

Content-Language: en-AU

Content-Type: multipart/alternative;

 
boundary="_000_SG2PR04MB16788BDAB4BCDFED4A9C94F8A26E0SG2PR04MB1678apcp_"

Security passes, it's pretty standard at a WGC - I've been to three & have
three at home. Naturally helps with many things, more so for the gliding
people & the locals (police too) - there's a lot of strange people in town,
allows others to identify who's there for the gliding & who's there for what
ever other reason..!

Good for the local businesses too to see that the WGC people are spending in
their town & being rewarded for their possible sponsorship. 

Cheers,

WPP



On 4 Jan. 2017, at 06:59, Mike Borgelt < mborg...@borgeltinstruments.com
 > wrote:

What's the story on security passes?

Mike

At 07:36 AM 1/4/2017, you wrote:

Content-Type: multipart/alternative;

 boundary="=_NextPart_000_000A_01D26665.B275CB80"

Content-Language: en-au

Hi Jo

We plan to arrive about 6 or 7pm Friday after landing at Wangaratta and
getting a rental car.

We are staying at the Comfort Inn.

I am not sure about the evening dinner, so we?ll see when we get there.

Hope that our security passes will be ready. I got the automatic email
response, but have heard nothing more.

Regards

Pam

 

 

From: Aus-soaring [ mailto:aus-soaring-boun...@lists.base64.com.au] On
Behalf Of Jo Pocklington

Sent: Wednesday, 4 January 2017 7:47 AM

To: 'Discussion of issues relating to Soaring in Australia.' <
aus-soaring@lists.base64.com.au  >

Subject: [Aus-soaring] accommodation available Benalla for World Comps

 

Anyone needing accommodation during the World Comps at Benalla, contact Jane
Rushworth   

Re: [Aus-soaring] accommodation available Benalla for World Comps

[Anthony Smith]

The security pass form is not immediately obvious.   Allegedly it was a last
minute requirement from the Benalla Council and Victoria Police.

 

I filled in the form and submitted the passport style photo here:

 

http://www.worldgliding2017.com.au/index.php/registration-form-all-types 

 

It has already been pointed out about the lack of categories for
non-participants.

 

I understand that this is necessary to gain access to 'airside'.

 

Anthony

 

From: Aus-soaring [mailto:aus-soaring-boun...@lists.base64.com.au] On Behalf
Of Mike Borgelt
Sent: Wednesday, 4 January 2017 9:12 AM
To: Discussion of issues relating to Soaring in Australia.

Subject: Re: [Aus-soaring] accommodation available Benalla for World Comps

 

OK so where's the link so you can get one? I tried the website, can't find
it.

Mike



At 08:13 AM 1/4/2017, you wrote:



Content-Language: en-AU
Content-Type: multipart/alternative;
 
boundary="_000_SG2PR04MB16788BDAB4BCDFED4A9C94F8A26E0SG2PR04MB1678apcp_"

Security passes, it's pretty standard at a WGC - I've been to three & have
three at home. Naturally helps with many things, more so for the gliding
people & the locals (police too) - there's a lot of strange people in town,
allows others to identify who's there for the gliding & who's there for what
ever other reason..!

Good for the local businesses too to see that the WGC people are spending in
their town & being rewarded for their possible sponsorship. 


Cheers,
WPP



On 4 Jan. 2017, at 06:59, Mike Borgelt < mborg...@borgeltinstruments.com
 > wrote:




What's the story on security passes?


Mike

At 07:36 AM 1/4/2017, you wrote:



Content-Type: multipart/alternative;
 boundary="=_NextPart_000_000A_01D26665.B275CB80"
Content-Language: en-au

Hi Jo
We plan to arrive about 6 or 7pm Friday after landing at Wangaratta and
getting a rental car.
We are staying at the Comfort Inn.
I am not sure about the evening dinner, so we?ll see when we get there.
Hope that our security passes will be ready. I got the automatic email
response, but have heard nothing more.
Regards
Pam
 
 
From: Aus-soaring [ mailto:aus-soaring-boun...@lists.base64.com.au] On
Behalf Of Jo Pocklington
Sent: Wednesday, 4 January 2017 7:47 AM
To: 'Discussion of issues relating to Soaring in Australia.' <
aus-soaring@lists.base64.com.au  >
Subject: [Aus-soaring] accommodation available Benalla for World Comps
 
Anyone needing accommodation during the World Comps at Benalla, contact Jane
Rushworth   janerushwo...@westnet.com   
 
 
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Borgelt Instruments - design & manufacture of quality soaring
instrumentation since 1978
www.borgeltinstruments.com  
tel:   07 4635 5784 overseas: int+61-7-4635 5784
mob: 042835 5784 :  int+61-42835 5784
P O Box 4607, Toowoomba East, QLD 4350, Australia 
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Borgelt Instruments - design & manufacture of quality soaring
instrumentation since 1978
www.borgeltinstruments.com  
tel:   07 4635 5784 overseas: int+61-7-4635 5784
mob: 042835 5784 :  int+61-42835 5784
P O Box 4607, Toowoomba East, QLD 4350, Australia 

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[Aus-soaring] Oops moment

[Anthony Smith]

Hi all

 

Whilst this happened a while back it does highlight the potential hazards of
loose articles in the cockpit.

 

http://petapixel.com/2016/08/15/military-plane-plunged-4400ft-pilots-nikon-g
ot-stuck-controls/ 

 

Anthony

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[Aus-soaring] Release Handles

[Anthony Smith]

Does anyone happen to know of a supplier of tee handles for releases?

 

Regards

 

Anthony

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[Aus-soaring] More on wing boards

[Anthony Smith]

http://www.gizmag.com/wingboard-wind-tunnel-testing/44468/ 

 

Doesn't involve gliders, but Pawnee's get a mention..

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[Aus-soaring] Winter Viewing

[Anthony Smith]

Another thunderstorm movie from the USA:  'Vorticity'

 

https://vimeo.com/mikeolbinski  

 

Anthony

 

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Re: [Aus-soaring] Fitting Go-pros and similar to gliders

[Anthony Smith]

Sorry better link here:

http://doc.glidingaustralia.org/index.php?option=com_docman=download
ias=1861-camera-check-list-airw-d024_slug=airworthiness=101 

Anthony

-Original Message-
From: Aus-soaring [mailto:aus-soaring-boun...@lists.base64.com.au] On Behalf
Of Anthony Smith
Sent: Thursday, 21 April 2016 4:12 PM
To: 'Discussion of issues relating to Soaring in Australia.'
<aus-soaring@lists.base64.com.au>
Subject: [Aus-soaring] Fitting Go-pros and similar to gliders

Hi all

http://doc.glidingaustralia.org/index.php?option=com_docman=document
yout=default=1861-camera-check-list-airw-d024_slug=airworthin
ess=101 

Camera Check List AIRW D024 has been released.  

This guidance addresses small, self-contained camera  installations (ie no
external wiring) mounted internally or externally on sailplane and motor
sailplane structures.  Risks to the sailplane and its occupants as well as
third party risks posed by the installation including potential camera and
mount detachment need to be managed and mitigated by careful installation
that will be assessed by the Form 2 Inspector for acceptability and
documented accordingly.

Thanks to Andrew Simpson for getting this done.

Regards

Anthony

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[Aus-soaring] LAST: Comparing accident rates

[Anthony Smith]

Hi All

I attended the safety seminar today at Gawler.  Chris Thorpe presented a
raft of accident / incident figures from the SOAR reports.  Of interest to
this discussion was:

>From May 2011 (start of SOAR reporting system) to 30 Sep 2015

Total reported incidents / accidents475

AEF flights 13
Training75
Local flying244
X-country   96
Competition 47

I haven't checked the adding up.  If they don't add up, I probably got some
of the numbers wrong when I scribbled them down.  

So competitions account for ~10% of reported incident / accidents over that
period.

Interestingly, they presented the stats from the recent Benalla comp:  1540
hrs flown and 1 reported incident / accident. (A complete coincidental
correlation to my post below).

Anthony 

-Original Message-
From: Aus-soaring [mailto:aus-soaring-boun...@lists.base64.com.au] On Behalf
Of Anthony Smith
Sent: Thursday, 10 March 2016 9:07 PM
To: 'Discussion of issues relating to Soaring in Australia.'
<aus-soaring@lists.base64.com.au>
Subject: Re: [Aus-soaring] Comparing accident rates

Without getting into the nitty gritty of statistics, I think it is
reasonable to suggest the following:

Based on the reported incidents over a recent 12 month period for gliding
and motorcycles, the basic incident per hour rate is broadly similar as per
Mark Newton's estimate. The percentage of incidents reported is likely to be
the same between both groups

Let us say that for the moment that the rate is roughly 1 incident per 1600
hrs.

If you assume (yes I know an assumption) that the basic rate is the same for
comps as it is for everyday flying, then a large comp is 'likely' to
generate at least one incident purely from the number of hours being flown
at that event. 

So the claim that a significant proportion of accidents happen at comps
could be considered to be true, but only because a significant proportion of
the national gliding hours occur at those events.

I have not found any data for comp versus non-comp incident rates.


-Original Message-
From: Aus-soaring [mailto:aus-soaring-boun...@lists.base64.com.au] On Behalf
Of Teal
Sent: Thursday, 10 March 2016 8:22 PM
To: Discussion of issues relating to Soaring in Australia.
<aus-soaring@lists.base64.com.au>
Subject: Re: [Aus-soaring] Comparing accident rates



On 10/03/2016 6:50 PM, Texler, Michael wrote:
>>   I've not seen them described that way in the road safety literature 
>> that I'm familiar with. How would that work? If the number of 
>> accidents is on the Y axis, what variable would the X axis have? If 
>> we go with road accidents (my field of expertise) it can't be 
>> age/driving experience, because the accident stats in NO way form a 
>> poisson distribution  when age/experience is your X-axis variable.
>> (Actually, road prangs by age/experience gives you more of a U-shaped
>> curve.) Also, rate of accidents (be they road prangs or glider
>> prangs) aren't constant over time (as required for a poisson 
>> distribution to be your distribution of
> choice) - they vary by time of day, for fairly obvious reasons, as 
> well as
other things (day of the week, long weekends, etc etc).
>
>> You appear to be approaching the issue from a rather different 
>> statistical approach to the ones I'm familiar with. Could you spell 
>> out your approach/methods in more detail? It's always interesting to 
>> hear how folk in other fields approach problems I'm familiar with.
>> :-)
> I am approaching it as counting events occurring over a duration of 
> time
(analogous to say counting disintegrations per second for radioactive
decay).
>
> Y axis would be the accident rate with any metric that you care to 
> choose
(i.e. accidents per 1,000 hours flown, accidents per 100km travelled,
accidents per 1,000 flights etc.).
> Y axis would be a duration of time, i.e over one year, over 10 years, 
> over
100 years.
>
> Then it is a case of using the appropriate test to compare the two 
> groups
(null hypothesis being that the accident rate between two groups is the
same).

I'm afraid I'm still not with you. *Which* two groups, exactly? 
Displaying all recorded traffic accidents over time in that way will (if you
use Australian data) give you a single line that (depending on the period
covered, but lets go with "the last 20 years") trends downward over time.
Who are you comparing again whom, in your example?

> A fairly blunt measure granted.
>
> Given your experience with road accidents analysis, how would you 
> approach
it?

Well, it would depend on exactly which question was being asked.  If we were
interested in the numbers of accidents had by drivers of different ages, my
previous example (u

Re: [Aus-soaring] perlan/U-2

[Anthony Smith]

> Must be one hell of a trailer parked outside. Imagine how scarce everyone 
> will be on the day they call for a rigging crew.

 

 

I have helped put the wings onto a C-47 Dakota.  It was… interesting.

 

There were photos and a link to the manual for the rigging of a P-47 
Thunderbolt circulated some time ago.

 

Anthony

 

From: Aus-soaring [mailto:aus-soaring-boun...@lists.base64.com.au] On Behalf Of 
Mark Newton
Sent: Monday, 14 March 2016 8:29 PM
To: Discussion of issues relating to Soaring in Australia. 

Subject: Re: [Aus-soaring] perlan/U-2

 

On 11 Mar 2016, at 9:17 PM, Derek Ruddock  > wrote:

 

After doing some research after the recent Tom Hanks film re Gary Powers, I 
found an amazing amount of declassified information on the U2 program, 
including all the actual flight paths. Google is your friend.

 

I visited Duxford in July.

 

They’re building a new exhibit hall for the American stuff: effectively a 
hangar big enough for the Duxford B-52, but with a glass front facing the 
runway. Massive quantities of concrete and structural steelwork. Won’t need 
radio navaids to find Duxford, you’ll be able to see the gravitational 
deflection of a plumb-bob.

 

Anyway:

 

Due to the (con | de)struction, all the American stuff is salted away into 
other parts of the museum, intermingled with other exhibits.

 

The hangar next to the one that contains the Concorde prototype currently, on a 
temporary basis, hosts the museum’s U-2.

 

But there isn’t enough space in that hangar for the U-2, everything is crammed 
in with no sensitivity at all to the exhibits’ historical significance. So the 
U-2 wings are sitting on the floor underneath and parallel to the fuselage of 
their SR-71, next to the U-2’s fuselage sitting on something that looks for all 
the world like a trailer dolly.

 

Yes, that’s right: They’ve derigged it.

 

SR-71 with U-2 wing panels on the floor:

 



 

 

U-2 fuselage sitting in a fuse cradle. Sadly, you can’t get any closer to it 
than this.

 



 

Must be one hell of a trailer parked outside. Imagine how scarce everyone will 
be on the day they call for a rigging crew.

 

  - mark

 

 

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Re: [Aus-soaring] Comparing accident rates

[Anthony Smith]

Without getting into the nitty gritty of statistics, I think it is
reasonable to suggest the following:

Based on the reported incidents over a recent 12 month period for gliding
and motorcycles, the basic incident per hour rate is broadly similar as per
Mark Newton's estimate. The percentage of incidents reported is likely to be
the same between both groups

Let us say that for the moment that the rate is roughly 1 incident per 1600
hrs.

If you assume (yes I know an assumption) that the basic rate is the same for
comps as it is for everyday flying, then a large comp is 'likely' to
generate at least one incident purely from the number of hours being flown
at that event. 

So the claim that a significant proportion of accidents happen at comps
could be considered to be true, but only because a significant proportion of
the national gliding hours occur at those events.

I have not found any data for comp versus non-comp incident rates.


-Original Message-
From: Aus-soaring [mailto:aus-soaring-boun...@lists.base64.com.au] On Behalf
Of Teal
Sent: Thursday, 10 March 2016 8:22 PM
To: Discussion of issues relating to Soaring in Australia.

Subject: Re: [Aus-soaring] Comparing accident rates



On 10/03/2016 6:50 PM, Texler, Michael wrote:
>>   I've not seen them described that way in the road safety literature 
>> that I'm familiar with. How would that work? If the number of 
>> accidents is on the Y axis, what variable would the X axis have? If 
>> we go with road accidents (my field of expertise) it can't be 
>> age/driving experience, because the accident stats in NO way form a 
>> poisson distribution  when age/experience is your X-axis variable. 
>> (Actually, road prangs by age/experience gives you more of a U-shaped 
>> curve.) Also, rate of accidents (be they road prangs or glider 
>> prangs) aren't constant over time (as required for a poisson 
>> distribution to be your distribution of
> choice) - they vary by time of day, for fairly obvious reasons, as well as
other things (day of the week, long weekends, etc etc).
>
>> You appear to be approaching the issue from a rather different 
>> statistical approach to the ones I'm familiar with. Could you spell 
>> out your approach/methods in more detail? It's always interesting to 
>> hear how folk in other fields approach problems I'm familiar with. 
>> :-)
> I am approaching it as counting events occurring over a duration of time
(analogous to say counting disintegrations per second for radioactive
decay).
>
> Y axis would be the accident rate with any metric that you care to choose
(i.e. accidents per 1,000 hours flown, accidents per 100km travelled,
accidents per 1,000 flights etc.).
> Y axis would be a duration of time, i.e over one year, over 10 years, over
100 years.
>
> Then it is a case of using the appropriate test to compare the two groups
(null hypothesis being that the accident rate between two groups is the
same).

I'm afraid I'm still not with you. *Which* two groups, exactly? 
Displaying all recorded traffic accidents over time in that way will (if you
use Australian data) give you a single line that (depending on the period
covered, but lets go with "the last 20 years") trends downward over time.
Who are you comparing again whom, in your example?

> A fairly blunt measure granted.
>
> Given your experience with road accidents analysis, how would you approach
it?

Well, it would depend on exactly which question was being asked.  If we were
interested in the numbers of accidents had by drivers of different ages, my
previous example (up in the first para quoted above) was a simple
descriptive graph showing difference in number of accidents by age, for a
set amount of time (a year, say). Or we could do it another way, and have a
graph with dates along the X axis, and separate lines (one for each age
group, maybe 16-25, 26-35 and so on) showing how accident numbers have
changed over time for each age group, if we were interested in seeing if
there were any obvious differences in crash rates over time by age group.

Or, if the question whether a particular time of day is more crash-prone
than other times, we could graph all the accidents occurring in the last
year with the X axis showing hours of the day (midnight-0200, 0201-0400,
etc). Or whatever.  All this is pretty basic stuff. We could go on from
there, and report means and standard deviations for age groups/time
periods/whatever of interest, and see if anything leaps out in terms of
obvious differences or trends. But that still isn't going to get you
anything you might want to discuss using null hypotheses or p values ... 
for that you really do need actual *inferential* statistical tests, with
specific groups that you are comparing. And this broad-brush descriptive
approach isn't going to give you that. You need to narrow it down a bit.

So: lets come back to the original topic that started all this - glider
accidents. How would I approach that?

Re: [Aus-soaring] Potential dangers in the sport of gliding

[Anthony Smith]

No.  They break it down by state only.  

 

Out of the 34, 26 were listed as nil injury, 4 minor and 4 major.

 

It’s on the bottom corner of page 45.  I thinks there are some typo’s on some 
of the row headings for Damage and Injury.

 

I do recall hearing the figure of 30 hrs per pilot per year being bandied 
around some (significant) time ago which reflects a person flying once per 
fortnight.  If you estimate that 2100 pilots do 30 hrs per year and your 200 
comp pilots do 150 hrs per year it works out to be an average all round of 50 
hrs per year per pilot.

 

So we get something like this (with a bit of rounding) for 34 events:

Average hrs per pilot per year

30 hrs1 event per 2,300 hrs

50 hrs1 event per 3,800 hrs

70 hrs1 event per 5,300 hrs

 

 

Lies and damned statistics!

 

 

From: Aus-soaring [mailto:aus-soaring-boun...@lists.base64.com.au] On Behalf Of 
Richard Frawley
Sent: Friday, 4 March 2016 3:13 PM
To: Discussion of issues relating to Soaring in Australia. 
<aus-soaring@lists.base64.com.au>
Subject: Re: [Aus-soaring] Potential dangers in the sport of gliding

 

any breakdown on the 23 in regard if any were at comps and how many fatalities?


On 4 Mar 2016, at 2:46 PM, Anthony Smith <anthony.sm...@adelaide.on.net 
<mailto:anthony.sm...@adelaide.on.net> > wrote:

>From the Feb-Mar 2016 issue of Gliding Australia:

 

>From 1 Oct 15 to 30 Nov 15: There were 34 reported accidents and incidents.

 

Of these:

 

In flight 2

Launch  5

Ground Ops   1

Landing23

Outlanding  3

 

I haven’t found the total reported hours for the same / similar period yet. I 
will not hazard a guess about the average hours per year per pilot.

 

Latest Gliding International magazine estimated that we have~2600 active 
pilots.  Mandy reported 2560 active pilots in January this year.

 

 

 

From: Aus-soaring [ <mailto:aus-soaring-boun...@lists.base64.com.au> 
mailto:aus-soaring-boun...@lists.base64.com.au] On Behalf Of Mike Borgelt
Sent: Friday, 4 March 2016 12:48 PM
To: Discussion of issues relating to Soaring in Australia. < 
<mailto:aus-soaring@lists.base64.com.au> aus-soaring@lists.base64.com.au>
Subject: Re: [Aus-soaring] Potential dangers in the sport of gliding

 

Making it anywhere from 50 to 80 km/hr isn't going to change things by all that 
much.

Call it a good physics order of magnitude estimate. It is better than that 
actually.

Mike

At 11:51 AM 3/4/2016, you wrote:






On 4/03/2016 12:07 PM, Mike Borgelt wrote:




I doubt you'll find glider crash rates per km. Hours, yes.

What is the average speed of a motorcycle on the roads. I'll say 60km/h based 
on driving a car with a car computer a few times.


Off the top of my head, I couldn't say for sure. I don't have time to go 
trawling through the literature right now, but I'd guess it might be a bit 
higher than for cars, given the proportion of motorcycle use that is 
recreational (as opposed to commuting in traffic).






That gives you around one crash per 1600 hours or so for motorcycles. I guess 
this is crashes not fatals? If so sounds about right for gliders too.


Yep, that's crashes, not fatals. Finding papers that have exposure data *and* 
fatality data for motorcycles would take a bit more time (I didn't see any 
during my quickish search earlier); and the nature of the beast is that just 
copypasting the exposure data into someone else's fatality rate calculation is 
prone to give you wildly inaccurate results, due to differences in sample 
characteristics, methodology, etc, etc. (These things are never easy.)


Teal






Mike

At 10:58 AM 3/4/2016, you wrote:






On 4/03/2016 10:44 AM, DMcD wrote:




And I don't think you could compare gliding with motorcycle riding (racing 
maybe). In terms of deaths per hundred thousand rider or comp pilot hours, 
you'd find a difference of several orders of magnitude. We have what  2500 
pilots active in Australia? And how many die each year? 1-2?


FWIW, I can help a bit with that question. Good road traffic exposure data can 
be a bit hard to come by, but a bit of searching found a paper* reporting 
motorcycle crash rates for NSW from (I think) 2004, and they said: "The mean 
crash rate (based on self-reported crash involvement) was 0.96 crashes/100,000 
km".

Now, if anyone has crash data and exposure figures for glider pilots (measured 
in km travelled) then we can see how glider fatalities compare with motorcycle 
fatalities, should we so desire.


Teal


*Source: Harrison, W. A., & Christie, R. (2005). Exposure survey of 
motorcyclists in New South Wales. /Accident Analysis & Prevention/, /37/(3), 
441-451.

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Re: [Aus-soaring] Potential dangers in the sport of gliding

[Anthony Smith]

>From the Feb-Mar 2016 issue of Gliding Australia:

 

>From 1 Oct 15 to 30 Nov 15: There were 34 reported accidents and incidents.

 

Of these:

 

In flight 2

Launch  5

Ground Ops   1

Landing23

Outlanding  3

 

I haven’t found the total reported hours for the same / similar period yet. I 
will not hazard a guess about the average hours per year per pilot.

 

Latest Gliding International magazine estimated that we have~2600 active 
pilots.  Mandy reported 2560 active pilots in January this year.

 

 

 

From: Aus-soaring [mailto:aus-soaring-boun...@lists.base64.com.au] On Behalf Of 
Mike Borgelt
Sent: Friday, 4 March 2016 12:48 PM
To: Discussion of issues relating to Soaring in Australia. 

Subject: Re: [Aus-soaring] Potential dangers in the sport of gliding

 

Making it anywhere from 50 to 80 km/hr isn't going to change things by all that 
much.

Call it a good physics order of magnitude estimate. It is better than that 
actually.

Mike

At 11:51 AM 3/4/2016, you wrote:





On 4/03/2016 12:07 PM, Mike Borgelt wrote:



I doubt you'll find glider crash rates per km. Hours, yes.

What is the average speed of a motorcycle on the roads. I'll say 60km/h based 
on driving a car with a car computer a few times.


Off the top of my head, I couldn't say for sure. I don't have time to go 
trawling through the literature right now, but I'd guess it might be a bit 
higher than for cars, given the proportion of motorcycle use that is 
recreational (as opposed to commuting in traffic).





That gives you around one crash per 1600 hours or so for motorcycles. I guess 
this is crashes not fatals? If so sounds about right for gliders too.


Yep, that's crashes, not fatals. Finding papers that have exposure data *and* 
fatality data for motorcycles would take a bit more time (I didn't see any 
during my quickish search earlier); and the nature of the beast is that just 
copypasting the exposure data into someone else's fatality rate calculation is 
prone to give you wildly inaccurate results, due to differences in sample 
characteristics, methodology, etc, etc. (These things are never easy.)


Teal





Mike

At 10:58 AM 3/4/2016, you wrote:





On 4/03/2016 10:44 AM, DMcD wrote:



And I don't think you could compare gliding with motorcycle riding (racing 
maybe). In terms of deaths per hundred thousand rider or comp pilot hours, 
you'd find a difference of several orders of magnitude. We have what  2500 
pilots active in Australia? And how many die each year? 1-2?


FWIW, I can help a bit with that question. Good road traffic exposure data can 
be a bit hard to come by, but a bit of searching found a paper* reporting 
motorcycle crash rates for NSW from (I think) 2004, and they said: "The mean 
crash rate (based on self-reported crash involvement) was 0.96 crashes/100,000 
km".

Now, if anyone has crash data and exposure figures for glider pilots (measured 
in km travelled) then we can see how glider fatalities compare with motorcycle 
fatalities, should we so desire.


Teal


*Source: Harrison, W. A., & Christie, R. (2005). Exposure survey of 
motorcyclists in New South Wales. /Accident Analysis & Prevention/, /37/(3), 
441-451.

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*Borgelt Instruments***- /design & manufacture of quality soaring 
instrumentation since 1978
/ www.borgeltinstruments.com  
< http://www.borgeltinstruments.com/  >tel: 
  07 4635 5784overseas: int+61-7-4635 5784
mob: 042835 5784: int+61-42835 5784
P O Box 4607, Toowoomba East, QLD 4350, Australia


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Borgelt Instruments - design & manufacture of quality soaring instrumentation 
since 1978
  www.borgeltinstruments.com
tel:   07 4635 5784 overseas: int+61-7-4635 5784
mob: 042835 5784 :  int+61-42835 5784
P O Box 4607, Toowoomba East, QLD 4350, Australia 

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Re: [Aus-soaring] people send me stuff

[Anthony Smith]

Yes, it is being circulated around the GFA e-mail addresses.

 

Anthony

 

 

From: Aus-soaring [mailto:aus-soaring-boun...@lists.base64.com.au] On Behalf
Of Mike Borgelt
Sent: Friday, 4 March 2016 12:45 PM
To: Discussion of issues relating to Soaring in Australia.

Subject: Re: [Aus-soaring] people send me stuff

 

Anyone else seen this? My giess is English wasn't the language it was
originally written in.


Mike


Information for all users of Flarm, OEM FLARM supplier and Flarm PowerFlarm


---

As is already well known to all users pilots,  FLARM introducing the new
coding xxtea present in the latest versions of firmware released, has
largely complicated life to all of us and to itself.

With the new release the whole package of 24 bytes used for the data is
encrypted (the length of the data packet is actually 32 bytes, but the first
8 bytes are left in clear because they include the name of the station as
well as the meaning of the content of rest of the data packet ).

With this letter we want to bring to the attention of all users as well as
the competent aeronautical authorities the weak points of this new solution,
but especially the incredible risks to which this technical choice of Flarm
is  exposesing all of us. These risks were detected after very accurate
tests performed in private laboratories in consequence to the release of the
current firmware adopted. FLARM very hardly will admit the existence of
these bugs and failures that we are exposing  in detail.

The following data are explained in such a way so that people have the
skills and the instruments can verify the truth of what is below reported.

This subject is independent from the Flarm decision to encrypt the protocol
in order to protect themselves from potential and possible competitors.

It is obvious that the encryption has been introduced for this protectionist
purpose, because from a merely technical point the integrity of the data
transmission was already well protected by natively incorporated algorithms
within the Nordic chip used in the Flarm hardware. For those that desire
more technical information on this chip, is possible to click the following
link 

http: // www . nordicsemi. com
/eng/content/download/2452/29528/file/Product_Specification_nRF905_v1.5 .pdf

ALL manufacturers (except one) who claim to be "Flarm compatible" have
inside EXACTLY the same hardware required by FLARM and they use the firmware
released by FLARM (under payment of expensive license fee).

This behavior that we know from long time, is contrary to the principle of
"development for competition" than in other fields has always given
excellent results in technological development.

This behavior  is especially contrary to the competition's principle that is
mandatory by European rules for the sale of products to the public, it means
that once people purchase products they should be functional and usable by
the owner independently by firmware update. It's enough to think about
Window as well as OS operating systems, that are fully compatible with
earlier versions of software and operating systems used before.

But we want to come back to the description of the technical problems/issues
, that is the main focus  of this information.

The data package, which we have mentioned above, is broadcasted  by FLARM
units (it doesn't matter  the licensed manufacturer) 2 times every second
based on the internal clock of the  GPS; the first transmission takes place
in the first half of the "second", the second transmission in the second
half.

For this reason, when the FLARM unit is receiving in  RF (radio frequency)
transmissions of  FLARM installed on gliders nearby, and in addition these
gliders are a lot, the available bandwidth in reception is saturated very
quickly.

According to this situation   when there are more traffic to be
controlled/monitored, and thus the potential danger situations is
increasing, the FLARM  operates in the worst and most unreliable manner.

But unfortunally  this is not the only technical problem source of
malfunctioning . We've found a far more dangerous firmware bug we're going
to  detail below.

In order to complicate a possible decryption by third parties, the
encryption key used by FLARM  is not fixed anymore (as it was  for the older
version of the firmware) but is built with the code of the transmitting
station and as well as with  the GPS time of the first transmission moment
,and is changed every 64 seconds.

In addition  to this during the 64 second interval, the data string
transmitted change every second, because of the GPS position data updated is
inside it.

The creator of the encryption code  XXTEA  says, and it is also reported by
other cryptanalysts (see the articles by John Kelsey, Bruce Schneier, and
David Wagner from 2002 to 2004), that exist certain combinations of DATA 

[Aus-soaring] JAR-22 dated 1 Apr 1980

[Anthony Smith]

Hi all

 

Does anyone have a copy of JAR-22 dated 1 Apr 1980 (original issue I think)
rather than more modern editions?

 

If so can I get a scan or a copy of it please?

 

Regards

 

Anthony 

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Re: [Aus-soaring] Australian glider canopy manufacturer

[Anthony Smith]

I have forwarded Jim's request on to the individual mentioned below (he
still works at the Uni).  

 

Anthony

 

From: Aus-soaring [mailto:aus-soaring-boun...@lists.base64.com.au] On Behalf
Of Michael Shirley
Sent: Monday, 8 February 2016 2:36 PM
To: 'Discussion of issues relating to Soaring in Australia.'

Subject: Re: [Aus-soaring] Australian glider canopy manufacturer

 

Hi Jim

 

6 years ago he worked at University of Adelaide, someone in SA will know
him.

Regards

Michael

 

  _  

From: Aus-soaring [mailto:aus-soaring-boun...@lists.base64.com.au] On Behalf
Of Jim Staniforth
Sent: Monday, 8 February 2016 1:43 PM
To: Discussion of issues relating to Soaring in Australia.
Subject: [Aus-soaring] Australian glider canopy manufacturer

 

Hello:
  I'm looking for the supplier of replacement glider canopies.
Information is appreciated.
Thanks,
Jim

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