3 ms·
I am unsure of how the trailing edge tech works, are they blowing the air out of trailing edge for roll control, and is it blowing aft or directionally? Is the
by ehnto 3y ago
I am unsure of how the trailing edge tech works, are they blowing the air out of trailing edge for roll control, and is it blowing aft or directionally? Is the blown air itself the force moving the wing or is it just redirecting flow over the wing? I am thinking of diminishing control as speeds lower, which is already a characteristic of regular control surfaces.
This is super interesting, I would love to build it in an RC plane.
- Gravityloss 3y agoIt acts like an aileron. If you blow air up from the right wingtip trailing edge, the right wing will go down. What is key here is that it affects the airflow and the effect is bigger than just the momentum of the blown air itself.
- carabiner 3y agoThe key concept is Coanda effect: https://en.wikipedia.org/wiki/Coand%C4%83_effect https://en.wikipedia.org/wiki/Coand%C4%83_effect There's a diagram of how this is implemented in the aircraft: https://www.baesystems.com/en/article/magma-the-future-of-flight https://www.baesystems.com/en/article/magma-the-future-of-fl... For roll, air is blown out of the TE aftward. Per Coanda and the lift equation (lift is proportional to square of flow speed), this blowing will generate higher lift on one wing, imparting a roll moment on the aircraft. For pitch, air is blown up at the engine's exhaust surface to point the flow up/down. It is shaped so that with 0 blowing, it's pointing down.
- flapless_anon 3y agoThe air is blown out aft, but the jet is blown adjacent to a curved surface and tends to stick to it. This entrains the flow over the wing and creates a change in lift distribution just like a normal aileron. The thrust vectoring is similar but slightly different, again the blown air is used to change an existing airflow.