In some aircrafts ailerons are situated inboard and some aircrafts outboard. why?

Question

In some aircrafts ailerons are situated inboard and some aircrafts outboard. why?

Answer 1

its to help with banking(rolling)  the airplane, u usually dont find inboard and outboard ailerons on the same planes until u get to the larger passenger and cargo planes, like c-5 galaxy or boeing 747

Answer 2

I guess I have to bite and ask the follow-up question.  What aircraft has inboard ailerons that doesn't have outboard ones?

The outboard ailerons allows you to have some "leverage", meaning you can get  by with smaller surfaces.

Answer 3

Some airplanes have both inboard and outboard ailerons.  On the 747 (and similar aircraft), when the wing flaps are retracted, ( high speed, normal cruise configuration) there is enough airflow over the ailerons that only the inboards are needed  for proper roll response.   The addition of outboards at high speed would make the plane too responsive to roll and it would be difficult to fly.  When the wing flaps are deployed (low speed, low airflow configuration) additional roll control is needed, and the deployment  of flaps automatically enables the outboard ailerons to augment the inboard ailerons.