Reno race crash in front of grandstands

Don't mix the failure of the trim tab (and it's effect on the pitch trim) and it's physical departure from the aircraft at a later point.

Two separate events.
 
TwoTwoLeft said:
I'm having a hard time with this instantaneous G-LOC explanation. It had to been well over 9... If you knew the airplane's velocity and could estimate the radius of the pitch-up, with some fancy math you could get a G force estimate.

It's the duration of the G force that has the greatest affect on the pilot's consciousness.
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No, definitely not the case -- sort of. The onset rate is much more significant in terms of loss of consciousness than the duration, especially in this scenario if the pilot is not physically prepared for that rapid onset. This assumes that we're not talking about a "spike" of G that has rapid onset and then goes away relatively quickly.

If you're tensed up and ready for the rapid onset, then it's not that big of a deal, and duration is much more of a factor.

If it catches the pilot by surprise, though, it's impossible to generate enough blood pressure to overcome that initial onset and "get back on top of the G" physically. When coupled with a long duration, GLOC is a done deal.
 
Hacker15e said:
No, definitely not the case -- sort of. The onset rate is much more significant in terms of loss of consciousness than the duration, especially in this scenario if the pilot is not physically prepared for that rapid onset. This assumes that we're not talking about a "spike" of G that has rapid onset and then goes away relatively quickly.

If you're tensed up and ready for the rapid onset, then it's not that big of a deal, and duration is much more of a factor.

If it catches the pilot by surprise, though, it's impossible to generate enough blood pressure to overcome that initial onset and "get back on top of the G" physically. When coupled with a long duration, GLOC is a done deal.
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Yeah you're right. Hitting a quick 9 would defiantly knock you out of you weren't ready for it. The "spike" in this case was probably much more rapid compared to how fast it unloaded. The most I've done was +8, -6, flying and along for the ride. Even along for the ride you're still sort of ready for it and with that kind of pull, that particular airplane would begin to decelerate anyway. Things are different when you have the performance to actually accelerate through the pull.

I was of thinking if he was already tensing up for +5 in the turn, how suddenly hitting 9 would then affect you? But regardless of G-LOC, you just wouldn't be able to move. If his hands came off the controls there would be no way to get them back even if he still had half his wits about him.
 
TwoTwoLeft said:
I was of thinking if he was already tensing up for +5 in the turn, how suddenly hitting 9 would then affect you? But regardless of G-LOC, you just wouldn't be able to move. If his hands came off the controls there would be no way to get them back even if he still had half his wits about him.
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Too, if he wasn't or was late on tensing up, he very likely wouldnt catch the spike in time.
 
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