"Bert Willing" wrote in message ...
You're right - the elevator produces lift (same direction as the wings) at
low speeds, not at high speeds. Got mixed up.

--
Bert Willing

ASW20 "TW"


"Gldcomp" a écrit dans le message de
om...
"Bert Willing" wrote in
message ...
That doesn't make sense to me. At high speeds, the elevator produces
lift
so
in case of structural failure, the bits would go upwards.

--
Bert Willing

ASW20 "TW"

Bert,

The elevator does produce lift, but in the opposite direction as the wings
(most of the time anyway).



Ok, so let me see if I've got this straight now. I cruising along at
60 kts in trim and elevator close to neutral. I want to go 140kts so
I push the stick forward, the elevator goes down, which pushes the
tail up, which pushes the nose goes down, I go faster. And all this is
because the elevator is producing more lift in the downward direction?

For a fixed stab with moving elevator don't we have to consider the
forces on both components separately to predict the failure mode?


Andy