On 2010-08-19 7:59 AM, [email protected] wrote:
Who's landing hot? Notice from time to time, some people screw up the
flare - initiate it just a tad late - and allow the nose gear to touch
first. The upward force of that premature nose gear touch rotates the
airplane around it's lateral axis and the mains touch with some flying
speed and the airplane becomes airborne.
Bart,
I don't think that CAN happen if the landing gear is properly
maintained. The mains should hang down at least as far, or farther,
than the fully extended nose gear. In a Coupe at specifications, the
only way for the nose to touch first would require a big nose-down
attitude that's something akin to a dive (or a HUGE sink rate) - in that
case the impact and repercussions would be extreme.
In anything not resembling a crash, if the nose gear touches, so do the
mains. If the mains are providing their proper support, then the
landing will, at worst, be flat and final because that flat landing has
nearly zero lift due to nearly zero angle of attack.
If your mains are not providing proper support, only then can they let
the tail go low - giving you the angle of attack needed for enough lift
to make the plane be airborne.
When those mains touch, the plane should be forced nose down - to that
low, on-the-ground-level attitude with near-zero angle of attack.
Everything else you've written (included below) follows from this
landing gear issue. If your landing gear kills your angle of attack as
it was designed to do, you can't lift off and you can't get into PIO.
Please explain to me how your plane can develop high angle of attack
from this situation?
Ed
The pilot, in an attempt to correct the bounce, instinctively applies
forward pressure on the yoke forcing another nose wheel touch and the
sequence repeats except this time with a bigger bounce. Subsequent
control inputs become a half cycle out of phase the and bounce becomes
more exaggerated. That is a true JC maneuver (slang) or
"pilot-induced-oscillation" (PIO). You haven't lived until you've
been in one of those. I witnessed one in 1961 in a T-33 and we flew
out of it.
The corrective action, by the way, is to go around immediately. If
you ride it out, you are either going to crash or at the least crunch
the nose gear and firewall.
Pants on the ground
Hat turned around
Bart
