[Aus-soaring] Spinning the ASK 21

2014-12-27 Thread Bernhard
Good evening all It seem to me that the attachment to my posing of earlier today never made it onto the list. It is a report on the spin characteristics of the ASK 21 and I assume this 6.5 MB document was automatically withheld due to it size. I’m happy to submit a copy to anyone interested

[Aus-soaring] ASK21 spinning was Re: Spin training

2014-12-27 Thread Peter (PCS3)
Page (v) /7. Some spins continued indefinitely if controls were released during the developed spin./ How many other gliders do this? I am pretty sure the Blanik self recovers from a spin but have never tested it! :-) PeterS On 27/12/2014 8:26 AM, Ulrich Stauss wrote: http://faculty.chicagob

Re: [Aus-soaring] Spin training

2014-12-27 Thread Ulrich Stauss
Is this what you had in mind Anthony? http://www.dg-flugzeugbau.de/index.php?id=seitenfaden-e Ulrich -Original Message- From: aus-soaring-boun...@lists.internode.on.net [mailto:aus-soaring-boun...@lists.internode.on.net] On Behalf Of Anthony Smith Sent: Saturday, 27 December 2014 16:49 To

Re: [Aus-soaring] Spin training

2014-12-27 Thread Anthony Smith
Actually, yes. I must try that out sometime! -Original Message- From: aus-soaring-boun...@lists.internode.on.net [mailto:aus-soaring-boun...@lists.internode.on.net] On Behalf Of Ulrich Stauss Sent: Saturday, 27 December 2014 8:07 PM To: 'Discussion of issues relating to Soaring in Austr

Re: [Aus-soaring] Spin training

2014-12-27 Thread Anthony Smith
Actually, I was thinking a flush mounted static probe rather than a pitot. It would be interesting to see if a transducer could pick up the pressure fluctuations from separated flow and be able to see the difference from attached flow. After doing some work with the RAAF's P-3 wing tips, I am pret

Re: [Aus-soaring] ASK21 spinning was Re: Spin training

2014-12-27 Thread Anthony Smith
Bergfalke IV decays into a spiral dive unless pro spin controls are held. If you hold pro spin controls, it still decays into a spiral dive after three or so rotations. Bocian used to stay in a spin until positive recovery controls were applied. Cath Conway told me way back when that anyth

Re: [Aus-soaring] ASK21 spinning was Re: Spin training

2014-12-27 Thread druddock
From memory there have been about 26 fatalities as a result of spin training in the Puchaz. If you want to release the controls in a spin go ahead but please don't take anyone with you Sent from Samsung Mobile Original message From: Anthony Smith Date: To: "'Discussion of

Re: [Aus-soaring] ASK21 spinning was Re: Spin training

2014-12-27 Thread Paul Bart
I wonder how many of them were off a winch from 1200 ft? Cheers Paul On Dec 27, 2014 8:29 PM, "druddock" wrote: > From memory there have been about 26 fatalities as a result of spin > training in the Puchaz. > If you want to release the controls in a spin go ahead but please don't > take anyone

Re: [Aus-soaring] Spin training

2014-12-27 Thread DMcD
>>You probably could do something very easily for modern non-flapped gliders. >>AoA indicators have been around for a long time. You could have three >>critical angles annotated on the device display: stall, climb and cruise. >>Flapped gliders would need to have a method of knowing what the f

Re: [Aus-soaring] Spin training

2014-12-27 Thread Paul Bart
SZD 55 also has a stall warning. Cheers Paul On Dec 27, 2014 9:29 PM, "DMcD" wrote: > >>You probably could do something very easily for modern non-flapped > gliders. AoA indicators have been around for a long time. You could have > three critical angles annotated on the device display: stall,

Re: [Aus-soaring] Spin training

2014-12-27 Thread Mike Borgelt
Might be possible. The frequency of the AC component of the pressure and the amplitude should change as the flow becomes turbulent. AC is good as offsets, temperature effects don't cause problems. Silicon pressure tranducers easily go out to one kilohertz frequency response unless they are the o

Re: [Aus-soaring] ASK21 spinning was Re: Spin training

2014-12-27 Thread Mike Borgelt
Well one was two USAF test pilot school graduates from at least 3500 feet AGL. Mike > On 27 Dec 2014, at 7:03 pm, Paul Bart wrote: > > I wonder how many of them were off a winch from 1200 ft? > > Cheers > > Paul > >> On Dec 27, 2014 8:29 PM, "druddock" wrote: >> From memory there have bee

Re: [Aus-soaring] ASK21 spinning was Re: Spin training

2014-12-27 Thread stephenk
Mike, you've made this claim before. I assume it is another incident, not the Caracole one (because they weren't that high, nor were they ex test pilots) But I've never been able to find any other references to an accident like this and the NTSB database only seems to show up 4 Puchacz accident

[Aus-soaring] Fw: DG Flugzeugbau - Newsletter No. 176

2014-12-27 Thread Tom & Jane Gilbert
-Original Message- From: Friedel Weber Sent: Sunday, December 28, 2014 5:38 AM To: Tom & Jane Gilbert Subject: DG Flugzeugbau - Newsletter No. 176 DG Flugzeugbau - Newsletter No. 176 December 2014 Welcome to the latest issue of our Newsletter Index: Flugzeugbau New Air Force Contr

Re: [Aus-soaring] Fw: DG Flugzeugbau - Newsletter No. 176

2014-12-27 Thread Ian Mc Phee
Come on tom and jane start writing re AAFC and DG 1001s for GA. it is a sugccess story Bernard GR IM On 28 December 2014 at 09:25, Tom & Jane Gilbert < tnjgilb...@internode.on.net> wrote: > > > -Original Message- From: Friedel Weber > Sent: Sunday, December 28, 2014 5:38 AM > To: To

Re: [Aus-soaring] ASK21 spinning was Re: Spin training

2014-12-27 Thread Derek Ruddock
Here's one from the Canadian ATSB which references others. http://www.bst-tsb.gc.ca/eng/rapports-reports/aviation/2005/a05o0204/a05o020 4.asp From: aus-soaring-boun...@lists.internode.on.net [mailto:aus-soaring-boun...@lists.internode.on.net] On Behalf Of stephenk Sent: Sunday, 28 December 201

Re: [Aus-soaring] ASK21 spinning was Re: Spin training

2014-12-27 Thread Derek Ruddock
From http://www.bst-tsb.gc.ca/eng/rapports-reports/aviation/2005/a05o0204/a05o020 4.asp “In 1990, a Puchacz spinning accident that resulted in two fatalities was investigated by the Transportation Safety Board of Canada (TSB). It was determined that the glider had inadvertently entered a spin at

Re: [Aus-soaring] ASK21 spinning was Re: Spin training

2014-12-27 Thread Michael Derry
'As highlighted in the British Gliding Association report, the retention of aft stick could be expected to be the involuntary reaction of the pilot in such a situation. ' Could be a major reason why people are dying. No one seems to be able to: measure this, train for it, or stop it happening. H

Re: [Aus-soaring] ASK21 spinning was Re: Spin training

2014-12-27 Thread stephenk
Thanks for that Derek, though I had seen the Canadian one and I was aware of the british ones (cos they keep coming up on soaring news sites whenever anyone mentions Puchacz, like here; https://www.mail-archive.com/aus-soaring@lists.internode.on.net/msg07341.html ). I am just intrigued by the

Re: [Aus-soaring] ASK21 spinning was Re: Spin training

2014-12-27 Thread Bernhard
Hi Derek This is consistent with a briefing that the late Mike Valentine gave in South Australia when the Puchacz first came on the market. He commented that it loses 300 plus feet in a single rotation and becomes a "widow maker" if spins are allowed to develop below 1000 ft AGL. The most frig

Re: [Aus-soaring] ASK21 spinning was Re: Spin training

2014-12-27 Thread Mike Borgelt
I've never seen an official NTSB report on it but it was reported on r.a.s. in a thread on Puch spinning after another Puch spin in elsewhere. IIRC it was Cindy Brickner who posted that information. R.a.s. Is probably archived somewhere. Note also we've had one near spin in by two level 3 instr

Re: [Aus-soaring] ASK21 spinning was Re: Spin training

2014-12-27 Thread stephenk
And that is what is so annoying about this whole discussion. Only a little factual documentation* exists about the whole issue. Yes, I have seen a number of posts by the person you mentioned but dont recall/cant find one like that. Here's a post from the same person https://groups.google.com/fo

Re: [Aus-soaring] ASK21 spinning was Re: Spin training

2014-12-27 Thread Michael Derry
This could just be one of those issues that does the rounds every so often, never getting the analysis it deserves. Some of the relevant information is relayed and lots of it not each time. Some of the information is distorted due to to people's memories and some of it not. If anyone believes pas

Re: [Aus-soaring] Aus-soaring Digest, Vol 135, Issue 78

2014-12-27 Thread Richard Frawley
I infer from this thread that the general view is that a pilot (perhaps more so in low hours) has a higher potential to spin when thermalling or attempting to thermal at less than 500' AGL than at higher altitudes. If so, why? What behaviours and responses are different? Richard Sent f

Re: [Aus-soaring] Aus-soaring Digest, Vol 135, Issue 78

2014-12-27 Thread Matthew Scutter
The horizon appears higher, and pilots in flatland sites are often taught to judge airspeed based on nose attitude on the horizon. On Sun, Dec 28, 2014 at 1:20 PM, Richard Frawley wrote: > I infer from this thread that the general view is that a pilot (perhaps > more so in low hours) has a highe

Re: [Aus-soaring] Aus-soaring Digest, Vol 135, Issue 78

2014-12-27 Thread James Dutschke
Another factor is the perceived acceleration and changes to turn radius/rate at low level if there is any wind about during a turn. The brain can see this and subconsciously try to keep the picture constant by tightening the turn or slowing down. Sent from my iPhone > On 28 Dec 2014, at 12:53

Re: [Aus-soaring] Aus-soaring Digest, Vol 135, Issue 78

2014-12-27 Thread Daryl Mackay
Hi Richard, Fear of manoeuvring when low level might have an inexperienced pilot over ruddering the turn. This pro-spin cross control in low level turbulent air (higher "g" transients) can certainly drive one into an incipient spin. Coupled with lack of spin currency hightening a natural fear when

Re: [Aus-soaring] ASK21 spinning was Re: Spin training

2014-12-27 Thread Mike Borgelt
So where did you get your knowledge of the Puch spin in at Cal city? Mike > On 28 Dec 2014, at 8:59 am, stephenk wrote: > > And that is what is so annoying about this whole discussion. Only a little > factual documentation* exists about the whole issue. Yes, I have seen a > number of posts

Re: [Aus-soaring] Aus-soaring Digest, Vol 135, Issue 78

2014-12-27 Thread Paul Bart
Were there any Puchaz spin fatalities in Australia? I know that DDSC used them for spin training from mid nineties without an incident. Cheers Paul On Dec 28, 2014 1:32 PM, "Daryl Mackay" wrote: > Hi Richard, > Fear of manoeuvring when low level might have an inexperienced pilot over > rudderin

Re: [Aus-soaring] Aus-soaring Digest, Vol 135, Issue 78

2014-12-27 Thread emilis prelgauskas
On 28/12/2014, at 12:50 PM, Richard Frawley wrote: I infer from this thread that the general view is that a pilot (perhaps more so in low hours) has a higher potential to spin when thermalling or attempting to thermal at less than 500' AGL than at higher altitudes. Additional to the pilot