Tim Van wrote:
Bill,
In my professional opinion, I would have to say 'a lot'. Yep, definitely a lot...
Seriously though, there would be two sources of G's. First, G's caused by the sudden
acceleration away from the plane as a result of the propellant, etc. used to eject the
pilot. Those G's would be dependant on the mechanics/design of the ejection system
(the power and duration of whatever is used, solid fuel rocket boosters usually).
Second, the sudden deceleration caused by suddenly moving from a 'sealed' container
into air that is moving past you at your current TAS (mach 1.2-1.5??). Someone correct
me if I'm wrong, but don't tell my dynamics prof...
up, up and away...
Most ejection seats are operationally rated for 8g it seems, though
some hit 12g. In other words, they have to exceed this on ejection
by a wide margin to get the pilot safely out.
I don't know the top number, but I wouldn't be surprised if it was
around 22g, but for a very short period. Ejecting is EXTREMELY
DANGEROUS, but is assumed to be less dangerous than staying in the
aircraft.
--
Andrew E. Mileski
Ottawa, Canada
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