PPRuNe Forums - Inappropriate rotation technique

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A rapid rotation can take a wing past its normal stall angle and still have 'attached' flow ie remain unstalled for few seconds. This has been shown in tests, and I am sure helped the Lightning 'rotation' take-offs where flight path rapidly caught up pitch angle.

The big no-no with 'slow' rotations on take-offs in normal a/c is......... - remember the s/e screen height on a wet runway and then rotate slowly? No thanks.

hawk37 wrote:

Quote:

I Clunk says:
"You rotate early, get airborne early (Vmu or "slow") and are at a pitch/airspeed mis-match (ie AOA)".
Would you really get airborne if you don't exceed your computed attitude?

Sure, ground effect increases your lift, so you can get airborne early. However, the final pitch attitude shouldn't be attained until you're already airborne. The wheels will come off around 6-8 degrees on a normal rotation and you'll continue to rotate. Rotate to 15 degrees on the runway in a -900, you'll have some paperwork.