ORIGINAL: drac1
ORIGINAL: sensei
ORIGINAL: drac1
IMO ailerons will provide lift only if they are part of the airfoil of the wing, the chord would be then from the leading edge of the wing to the trailing edge of the aileron.
If the ailerons are flat with no airfoil profile (as on some sports planes and fun fly's), the chord would then be from the leading edge of the wing to the hinge line as the aileron being parallel top and bottom would provide no lift.
When the ailerons are deflected, they alter the direction of airflow which causes the plane to roll. The reason the plane loses altitude is because the lift from the wing is no longer acting directly upwards but at an angle and their isn't sufficient lift acting upwards to maintain altitude. To turn, elevator must be applied which again, alters the direction of airflow moving the tail of the plane which in turn changes the direction of the plane. To prevent loss of altitude the elevator must be applied between the wings being level and at 90 degrees.
The stab will contribute very little to lift in most cases as the majority of models do not have airfoil sections on the stab. The stab/elevator and fin/rudder are primarily to steer the plane.
It was mentioned in an earlier post that if the model pulls to the canopy or belly in a vertical climb, adjust the ailerons up or down to achieve a straight vertical. This would most likely work, but the correct fix is to adjust down thrust on the engine.
Oh really, go remove an aileron from one side of your wing, then go fly your airplane this way. Now come back and tell us all just how it had no effect on it's flight characteristics, how there was no need for trimming the aileron on the wing that has an aileron of course, thus reducing the
LIFT of that wing in order to maintain level flight, or....
Bob
1. What's the sarcasm about? I stated ''IMO'' and i stand by it. Everyone is entitled to their opinion and be part of a reasonable discussion.
2. I didn't say that the ailerons don't affect flight characteristics. You need to read the post, then think about your reply before hitting the OK tab.
3. How can an aileron that is parallel produce lift as there is no difference in air pressure top and bottom? The aileron when deflected changes the AOA which puts air pressure against the surface causing the plane to roll.
The only thing that keeps a flat plan foamy in the air is the AOA, which is attained by the propellor thrust and applying elevator, which again is changing the AOA. Cut the throttle and the plane will fall as there is no air pressure against the wing or air pressure differential to hold it there.
4. That's just being silly saying to remove an aileron and fly.
5. But hey, that's MO and you're the guy at the field who is always right.
Have you ever flown an airplane that shed an aileron or a wing half for that matter? I have, you find out real quick what the absence of wing area does on any part of that wing while flying.
Bob