Looking for way to make elevons capable of multiple(>2) pitch angles

[Reusables]

Hello!

I was developing some propeller plane, and encountered a problem with stability.

When plane goes too fast, rotation speed decreases relative to the forward speed, decreasing the AoA of propeller elevons to negative causing unstable lift. It seems that the only solution is changing pitch of propellers.

So, are there a way to have 3 pitch angles? Any way will be great if it is stable and reliable.

Perhaps some small rotors could be configured for this? Or, is it possible to let landing struts push parts in the same ship? This doesn't work when I tried...

Any ideas will be greatly appreciated!

Edited December 28, 2016 by Reusables
Edited title

[DrunkenKerbalnaut]

4 hours ago, Abastro said:

Hello!

I was developing some propeller plane, and encountered a problem with stability.

When plane goes too fast, rotation speed decreases relative to the forward speed, decreasing the AoA of propeller elevons to negative causing unstable lift. It seems that the only solution is changing pitch of propellers.

So, are there a way to have 3 pitch angles? Any way will be great if it is stable and reliable.

Perhaps some small rotors could be configured for this? Or, is it possible to let landing struts push parts in the same ship? This doesn't work when I tried...

Any ideas will be greatly appreciated!

Using the 'deploy' functionality, you can set a taxi speed angle, and flight speed angle for the blades. Then, set the deploy functions to an action group. When in flight, hit F12 to see the aerodynamic effects. When the blades begin to lose effectiveness due to speed, toggle them with your action group. Make note of the speed, and use that number as a rule of thumb later. 

[Reusables]

Just now, DrunkenKerbalnaut said:

Using the 'deploy' functionality, you can set a taxi speed angle, and flight speed angle for the blades. Then, set the deploy functions to an action group. When in flight, hit F12 to see the aerodynamic effects. When the blades begin to lose effectiveness due to speed, toggle them with your action group. Make note of the speed, and use that number as a rule of thumb later. 

Well I know that, the problem is that I want more than 3 pitch angles.

[DrunkenKerbalnaut]

3 minutes ago, Abastro said:

Well I know that, the problem is that I want more than 3 pitch angles.

Gotcha. Stack more flaps and simulate it. 

[Reusables]

2 minutes ago, DrunkenKerbalnaut said:

Gotcha. Stack more flaps and simulate it. 

I tried it. Just found out that the ones with more pitch generates negative lift, which makes the props useless. (net lift became 0)

[DrunkenKerbalnaut]

See if you can design an all-stock collective joint, like helicopters. Other than that, I'd probably just use more blades and deal with diminished lift/thrust until high airspeed. 

EDIT: or actively babysit authority. 

Edited December 28, 2016 by DrunkenKerbalnaut