On Thursday, September 22, 2022 at 2:21:51 PM UTC-6,
[email protected] wrote:
Thanks for sending the NTSB report. Can't be sure that this is directly related but it is certainly similar.
At Moriarty flying my 27. A nice active day. Start the tow and a strong gust crosses the runway; the Pawnee towplane bobbled but I got the full gust (post-incident rationalisation wth Mike Stogner an experienced western tow pilot) and the 27 popped off
the ground to maybe 6-7 feet; as it started to sink back I added a bit of back stick. Ground reports said that the glider hit level -- nevertheless it created a bounce exactly when the tow plane removed the slack in the line that had emerged. Bounce plus
a sort of bungee launch set the 27 off sharply upward. Immediate release -- at least at my reaction time, which even now is not bad. The glider kited to maybe 40 feet before I had the speed back under control, so I eased to the right to aim for the
taxiway, to see to my left Mike accelerating hard, taking off and getting away from the runway. At which I moved back over the runway and flew the remaining half mile plus to land at the 08 end and get out of the way of the next tows (and to gather my
wits, breath and knees ...)
My thought re the accident from my experience above is that there was likely rope slack which the glider ran over and that the accelerating tow car, though not at full speed, was going fast enough to create the same effect I had, though clearly to much
larger effect. Is there anything in any reporting whether the glider released and if so when? Reports say the glider overran the rope -- the subsequent result could have been similar to my incident writ large -- a loop of slack rope then pulled tight
like a bungee. Isn't there some rule suggesting that if the rope is overrun on any towed launch then release immediately, though I have often wondered how the pilot is supposed to know it has happened completely out of sight in any glider type I flew.
On Thursday, September 22, 2022 at 3:22:48 PM UTC-4, [email protected] wrote:
On Thursday, July 18, 2019 at 1:41:09 PM UTC-6, Ramy wrote:
On Thursday, July 18, 2019 at 11:02:08 AM UTC-7, ProfJ wrote:
On Thursday, 18 July 2019 08:39:25 UTC-6, Waveguru wrote:
I am very sorry to report that there has been another fatality in our sport. Yesterday, July 17th, at the annual Alvord Desert Safari, Dave Kibby crashed during an auto tow launch. All I have at this time is that as he rotated into his climb he
was hit with a gust, rolled to the left and hit the deck. He was killed instantly. I wasn't there, and I didn't know Dave, but I know most of the other people involved at this event. My thoughts go out to friends and family.
Boggs
My condolences to his friends and family. It seems to me that we are having a horrible streak of tragedies at the moment - or is this typical and I just never paid attention before?
Unfortunately and tragically this is typical, although this year so far it is more concentrated in the last few weeks. Last year we lost 11 pilots to glider accidents as far as I know. we loosing 6 pilots on average per year in the US, mostly
during the summer.
Ramy
I don't mean to dig up an old thread, but I was finally able to find the NTSB accident report, and I believe there are lessons we can learn from this one. Here it is:
https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/99876/pdf
My impression is that there was something that happened to cause the slack in the tow rope--possibly the tow vehicle loosing power temporarily while shifting gears? Then the pilot pulled back on the stick to take up slack or start the kiting phase, but
was too slow and at too steep an angle of attack when the slack got taken up, which caused the wing to stall and spin in. Keep in mind that if the glider is in too high of a nose up attitude when the slack comes out, it can take a normal angle of attack
relative to the motion of the glider (climbing), and suddenly change it to exceed the critical angle of attack when tension on the tow rope pulls in a more forward direction. In any event, I believe the pilot should have dropped the nose and released
the tow rope. Someone more knowledgeable correct me if I'm wrong.
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