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Old 16th Jan 2012, 17:27
  #47 (permalink)  
Big Pistons Forever
 
Join Date: Jan 2004
Location: Canada
Age: 63
Posts: 5,209
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Originally Posted by BackPacker
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So if you are going to hit a concrete wall, it really doesn't matter how long the ground run preceding that hit is. Yes, if your ground run before hitting the concrete wall is one fuselage length, the *average* G force will be 9G or thereabouts: One fuselage length of almost zero G (horizontal deceleration), followed by one engine cowling length of 25+ G. Unfortunately your body is not going to care for the average G, but for the peak G.
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True; which is why I made the comment

and have at least a small run after touchdown to moderate the de-acceleration forces ( ie not a head on impact with a solid immovable object)
The central point, which I think is a failing of todays flight training, is that the crappy patch of rough ground a few hundred feet long that is right in front you is likely to be discounted as a viable option because it doesn't meet the "right" criteria and so pilots are trained to turn towards the "good" field
which in the EFATO scenario is probably too far away or behind them.
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