Flight modelling trivia

[Citabria]

why do you need to use rudder when you begin or end a turn but not when you are established in the turn?

[M0nkey_Man]

it bleeds speed?

[Zeagle]

To counter the adverse yaw when ailerons are deflected.

see here

[DaHand]

To counter the adverse yaw when ailerons are deflected.

see here

Most areo manufacturers model their aircraft in order to counteract that adverse effect without applying rudder.  And that yaw effect is really only on larger aircraft if I recall correctly.

[Zeagle]

While designs are created to minimize it, it is still there. Even the tailless designs of the Horten brothers still had adverse yaw.
Frise type ailerons, differential ailerons, spoilers, wing twist, and computer FBW designs are all used to counter it. The aircraft you mention that don't need rudder inputs probably fall into the FBW category.

Go grab a few hours in a 172 or similar then come back and let me know what you find 

[Ardy123]

keeping coordinated in you turns actually greatly improved your turn and e retention. Try it in AH, when you make a turn look a the ball and try and keep it centered, and you will be amazed.

[MachFly]

Zeagle and Bunnies are correct.

[hitech]

If a plane is in a steady 45 deg banked level turn to the left.  Which wing is producing more lift.

HiTech

[Ardy123]

err it was magically deleted.... nvrmind

[JUGgler]

If a plane is in a steady 45 deg banked level turn to the left.  Which wing is producing more lift.

HiTech

That would be the right wing, it is traveling further so it is moving more air!



JUGgler

[kvuo75]

why do i think that's a trick question. I'm guessing both are making the same lift.

[Stang]

If a plane is in a steady 45 deg banked level turn to the left.  Which wing is producing more lift.

HiTech

If it's an F-4u, and the flaps are down, the answer is neither... The hover engines are just engaged.

 

[Vinkman]

If a plane is in a steady 45 deg banked level turn to the left.  Which wing is producing more lift.

HiTech

The outer (right) wing. It's moving faster.

[Nypsy]

Common sense would say the right wing.
At the start of the bank however don't the ailerons kill the lift on the left wing and increase it on the right?
Is this what causes the yaw action, or is it from the increased drag of the left wing aileron?

[kvuo75]

Common sense would say the right wing.
At the start of the bank however don't the ailerons kill the lift on the left wing and increase it on the right?
Is this what causes the yaw action, or is it from the increased drag of the left wing aileron?

adverse yaw is from the extra lift.. byproduct of lift is drag.

The outer (right) wing. It's moving faster.

see if one is making more lift though, wouldn't the plane keep rolling? thats why i figured both are the same in stable turn.