With all the talk surrounding flaperons, I thought it might be a good idea to write something in RWA to explain why they’re there and how they work IRL.
flaperons do quite literally what it says on the box, they’re both flaps and ailerons.
During takeoff and landing, they’ll behave like flaps and droop with the flaps. Their party trick is that they can still move up and down really quickly while drooped, unlike flaps and like an aileron. This allows the pilots to have more control over the roll of the aircraft while also not sacrificing on lift capability because the upward deflection of one flaperon is equal to the downwards deflection of the other flaperon.
In cruise, those flaperons act like normal ailerons.
During rollout after landing, those flaperons go to full upwards deflection to decrease the amount of lift generated on the wings.
Here are some images showing them in action and to illustrate what I’m talking about. (All of the photos belong to me)
- No control input - Flaperon flush with the flaps, aileron in neutral position.
- Control input to the left - Flaps raise slighty while the flaperon deflects slightly downwards compared from last image to produce left roll in tandem with the outboard aileron deflecting downwards.
- Roll complete, no control input - Flaps now up. flaperon fully up with flaps, aileron in a neutral position.
- Rollout after landing - Flaperon fully up to decrease lift after landing.