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Yes. - and the tugs also will be
fitted.
We have been able to obtain sponsorship to pay for
the hire of units to fit out all entries in the comp - thanks to NSWGA, Oamps,
and QBE.
While it will not be mandatory we expect every
pilot take advantage of this offer and participate in the trial. There will be a
decided safety benefit to all if everyone joins the trial.
Dave Shorter - Contest Director
----- Original Message -----
Sent: Wednesday, October 26, 2005 8:50
AM
Subject: RE: [Aus-soaring] Zaon Flight
Systems collision avoidance
Are you planning to
trial this in all the entered gliders then Nigel?
-----Original
Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of RF Developments Pty
Ltd
Sent: Tuesday, 25 October
2005 5:17 PM
To: 'Discussion
of issues relating to Soaring in Australia.'
Subject: RE: [Aus-soaring] Zaon Flight
Systems collision avoidance
OzFLARM, which uses the core FLARM
micro has a different way of presenting the information ( see OzFLARM news )
If a glider is behind you, further than 1 km , a green LED will light up in
that direction. If he is less than 1 km , a RED led will light up. If he is a
potential threat , the red will blink and the audio will go
off.
The core collision algorithms are
the same.
I should have the manual ready in
a few weeks, around the time 66 OzFLARMS are going to be flying around in
close formation at Lake Keepit!
Nigel Andrews
Managing Director
RF Developments Pty Ltd
"A Queensland Company devoted to Research and
Development in aviation electronics"
Email [EMAIL PROTECTED]
Web www.rf-developments.com
Ph: (61) 7 54635670 Fax: (61) 7
54635695
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The information contained in the above e-mail message
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-----Original
Message-----
From:
[EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Geoff Kidd
Sent: Tuesday, October 25, 2005 3:29
PM
To: Discussion of issues
relating to Soaring in Australia.
Subject: Re: [Aus-soaring] Zaon Flight
Systems collision avoidance
Thanks for
that Mark. It assists understanding a lot.
I found
it interesting that based on the latter part of that video, it would be
possible to be at the same height and flying towards (but a tad
behind) that other glider ... and not get any warning unless the
tracks intersect or converge ................ and if the
other remains unseen it would be possible to tighten the turn and
converge to get a warning just as they collide.
For some
reason I assumed that if you are constantly getting closer to, but not
intersecting with, another Flarm equipped aircraft, then you would get
some type of "heads-up" (poor pun) warning.
I'm not
complaining, mind you, I just want to understand the way that it operates.
It just proves that Flarm is certainly useful but it is an aid to the "see"
of see-and-avoid, but there can never be any guarantees even if all aircraft
are equipped.
On looking
at that video again, the LEDs were unlit during the turn to port and early
in the approach to the other aircraft. How does it indicate proximity
as per your 2nd last para?
Regards
& thanks for your response Geoff
----- Original Message -----
Sent:
Tuesday, October 25, 2005 2:34 PM
Subject: Re:
[Aus-soaring] Zaon Flight Systems collision
avoidance
Geoff Kidd
wrote:
> In trying to understand your
explanation, and wanting to fully grasp
> the way these things
work, I looked again at the Flarm video on DG's
> website http://www.dg-download.de/Videos/flarm-rennes.wmv.
>
In that case the display alarms initially at the 12.30/01.00 LED,
>
which is about where the other glider is, when the tracks of the 2
> aircraft appear to be intersecting but when there also appears to
be a
> reasonable height separation ..... and it looks to me like
there was not
> a "risk of collision".
They were on a
converging heading. The FLARM was essentially saying,
"Even
though the separation is high, if you continue the way you
are at the
moment you will probably hit each other."
Note that the alarm tone
was different to what it was later on when
they were
closer.
> The pilot then bears away to
starboard and turns back to port to fly
> directly at or towards
the other aircraft.
Obviously not directly at it, because they
didn't hit each other.
Unless it's directly in front of you, flying
directly at the position
another aircraft is in *right now* will cause
you to miss it, because
by the time you reach that position the other
aircraft won't be
there anymore.
They were on diverging headings
during that phase of the demo, when
the alarm was silent. They
were in close proximity to each other,
but there was no collision risk,
so there was no alarm.
> It looks to me
that there is a greater risk of collision after he
> turns back to
port towards the other ship when it is visible in his
> screen
........... yet the alarm doesn't sound again until he is
>
reasonably close.
Reasonably close *and converging*.
There
is no mystery to this, Geoff. You can fly as close to
another
glider as you want; but if you're not converging with it,
FLARM won't
bother to sound an alert (it'll still indicate proximity on
its visual
display, but it won't sound an alarm to indicate an imminent
collision)
That's the right answer, isn't it? Nobody wants a
"collision avoidance"
system which chirps continuously just because you
happen to be sharing
a thermal with someone else, do they? What
we really want is a collision
avoidance system which is silent when
you're sharing a thermal with
someone else *unless you're about to hit
each other*.
-
mark
--------------------------------------------------------------------
I
tried an internal
modem,
[EMAIL PROTECTED]
but it hurt when I
walked.
Mark Newton
----- Voice: +61-4-1620-2223 ------------- Fax:
+61-8-82231777
-----
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