Question on 737 spoilers...
Discussion
I was on a 737 the other day, and the inner port spoiler was lifting up about 6" on climb out. The flaps were still down, and it was almost as if the airflow was getting under it and lifting it up. I'm no expert, but I can't see any reason why you'd want spoilers deploying on takeoff...as someone with a bit of glider experience it just seems all wrong!
Is this normal?
Is this normal?
Thanks for clearing that up. Seems odd though...so you've got flaps extended giving more lift, and spoilers deploying reducing lift at the same time
I'm also pretty sure it was only the inboard spoiler...I would have thought if you wanted to induce roll, the further outboard the control surface movement was, the better?
I'm also pretty sure it was only the inboard spoiler...I would have thought if you wanted to induce roll, the further outboard the control surface movement was, the better?
Hard-Drive said:
Thanks for clearing that up. Seems odd though...so you've got flaps extended giving more lift, and spoilers deploying reducing lift at the same time
I'm also pretty sure it was only the inboard spoiler...I would have thought if you wanted to induce roll, the further outboard the control surface movement was, the better?
The flaps allow the plane to fly slowly. The spoilers assist in giving the pilot better roll control at slow speeds.I'm also pretty sure it was only the inboard spoiler...I would have thought if you wanted to induce roll, the further outboard the control surface movement was, the better?
Hard-Drive said:
Thanks for clearing that up. Seems odd though...so you've got flaps extended giving more lift, and spoilers deploying reducing lift at the same time
I'm also pretty sure it was only the inboard spoiler...I would have thought if you wanted to induce roll, the further outboard the control surface movement was, the better?
I'm also pretty sure it was only the inboard spoiler...I would have thought if you wanted to induce roll, the further outboard the control surface movement was, the better?
Only the down going wing spoilers pop, and only the flight spoilers, the ground spoilers are interlocked so they only work with weight on wheels for lift dump. The more aileron you apply, the more spoiler you get after 10 degrees of control wheel movement. You will also find that roll control over rides speed brake function.
Hard-Drive said:
Thanks for clearing that up. Seems odd though...so you've got flaps extended giving more lift, and spoilers deploying reducing lift at the same time
I'm also pretty sure it was only the inboard spoiler...I would have thought if you wanted to induce roll, the further outboard the control surface movement was, the better?
I'm also pretty sure it was only the inboard spoiler...I would have thought if you wanted to induce roll, the further outboard the control surface movement was, the better?
Only the down going wing spoilers pop, and only the flight spoilers, the ground spoilers are interlocked so they only work with weight on wheels for lift dump. The more aileron you apply, the more spoiler you get after 10 degrees of control wheel movement. You will also find that roll control over rides speed brake function.
Hard-Drive said:
Thanks for clearing that up. Seems odd though...so you've got flaps extended giving more lift, and spoilers deploying reducing lift at the same time
I'm also pretty sure it was only the inboard spoiler...I would have thought if you wanted to induce roll, the further outboard the control surface movement was, the better?
I thought it was to reduce adverse yaw, rather than induce roll? (i.e balance the drag caused by the down-going aileron on the opposite wing). Also, following that, wouldn't the inboard spoiler be less likely to cause a wing drop in a low and slow configuration?I'm also pretty sure it was only the inboard spoiler...I would have thought if you wanted to induce roll, the further outboard the control surface movement was, the better?
Yeah spoilers, differential ailerons and rudder cross mixing through the yaw damper are all used to prevent adverse yaw.
I fly the triple but this never fails to amaze me what flight control computers can do! Everything going in all directions!
http://youtu.be/MsV6c5GdxNQ
I fly the triple but this never fails to amaze me what flight control computers can do! Everything going in all directions!
http://youtu.be/MsV6c5GdxNQ
Edited by Kempus on Saturday 20th December 17:48
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