we hit the trees, the airspeed indicated 125 knots (140 mph). If
my head had been forward instead of back against the
headrest, it would not have snapped forward sending my helmet (with
an ill-fitting nape strap) flying through the fragmented canopy.
The stretched harness, like a rubber band, slung my bare head back
against the poorly padded headrest, knocking me out.
If I had not lost my helmet,
or the head-rest been properly padded, I would have not been knocked
out and could have gotten out of the fire sooner. We cut 35 feet
out of the top of 110-foot tree right off the end of the runway,
and an 800-foot swath through the trees, landing in that circle
impacting at 15 Gs!
You should be able to survive a 35 mph
impact, the average impact speed in vehicle accidents,
if I survived 140 mph impact!