ATL-LAS 3

[Mobius]

I learned that spoilers can be used on some aircraft for roll control instead of ailerons or in conjunction with ailerons.  When ailerons are used to roll an airplane, they created more lift on one wing and less on the other, rolling the airplane.  With lift comes induced drag so the wing creating more lift also creates more drag so the nose is pulled in one direction or the other.  This is called adverse yaw and it is the reason rudder input is required while rolling an airplane.  

However, spoilers break up or "spoil" the airflow over the top of the wing which so that wing is then creating less lift and drag than the other wing so the airplane is rolled without pulling the nose in the opposite direction.  When spoilers are used the nose is pulled in the same direction that the airplane is rolling which is called adverse yaw.  

I think this is correct.  I am mostly sure about the spoiler thing but I have never flown an airplane with spoilers so I cannot be completely sure.

[Hagar]

[quote]I learned that spoilers can be used on some aircraft for roll control instead of ailerons or in conjunction with ailerons.

[Silver1SWA]

The spoilers do react in conjunction with the ailerons during extreme bank inputs by the flight controls.

[iwannaflySC]

[quote]The spoilers do react in conjunction with the ailerons during extreme bank inputs by the flight controls.