3 ms·
It is interesting that the experiment he proposes actually does use a jet of air! I guess the best counterexample would be to have an airfoil with 0 angle of a
by Cogito 12y ago
It is interesting that the experiment he proposes actually does use a jet of air!
I guess the best counterexample would be to have an airfoil with 0 angle of attack - horizontal on the bottom and curved down on top. Can this wing divert the stream of air downwards, generating enough to allow flight? Even if it does, how much extra lift do you get when you increase the angle of attack?
- lisper 12y agoFor an asymmetric airfoil, zero angle of attack is defined as the AoA that produces zero lift.
- aidenn0 12y agoI've seen it defined as the chordline being parallel to the flow.
- lisper 12y agoYeah, you can define it that way too. But that's not a very useful definition when you're actually flying an airplane.
- Cogito 12y agoYes, please excuse my ignorance of the technical use of the terms. It would be interesting to see an experiment that isolated any divergence of the airstream caused by Coanda-like effects. I don't know what that experiment would look like, nor if any lift at all would be generated.
- lisper 12y agoIt's not a hard experiment to do: make an airfoil out of cardboard and stick it in front of a fan.