Posts: 99
Joined: Sat Nov 13, 1999 6:16 am

Spoilers On Takeoff?

Sat May 11, 2002 9:26 am

I recently noticed that on take off in a 737, the spoilers seemed to deploy at varying degrees after rotation for a few hundred feet into the climb. Is this a function of the 73's trim?
Posts: 1989
Joined: Mon Jul 10, 2000 4:51 am

RE: Spoilers On Takeoff?

Sat May 11, 2002 11:04 am

I'd suspect you were seeing the roll spoilers deflect as the crew or autopilot put in small roll corrections to stay level.
Posts: 37
Joined: Mon Oct 01, 2001 3:48 am

RE: Spoilers On Takeoff?

Sat May 11, 2002 5:23 pm

it's normal , some spoilers (roll spoilers) are operating with the ailerons.
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RE: Spoilers On Takeoff?

Sat May 11, 2002 6:05 pm

yes what you saw were roll spoilers. They operate with and sometimes without the ailerons depending on the IAS.
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Joined: Wed Oct 06, 1999 10:48 am

RE: Spoilers On Takeoff?

Mon May 13, 2002 6:21 pm

On the 737, like many aircraft, have flight spoilers that can be used to assist roll-control by deploying asymetrically. Asymetrical deflection helps kill-off lift on that wing, thus lowering it at a more rapid rate than the ailerons could alone. On the 737, once the yoke is turned past 7 degrees the flight spoilers begin to raise asymetrically (the spoilers are not up on the other side).


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