[GGTharos]

You can never prevent a collision. It has less to do with stiff blades and more with rotor disk tilt. You'd have to further separate the rotors, but then I think you start losing some of that counter-rotating rotor efficiency.

[Blaze1]

Originally Posted by GGTharos

You can never prevent a collision. It has less to do with stiff blades and more with rotor disk tilt. You'd have to further separate the rotors, but then I think you start losing some of that counter-rotating rotor efficiency.

Thanks GGTharos

I did some digging around and found this: http://aeronode.com/aero/18/sikorsky...run-in-october
Also this: http://www.aviastar.org/helicopters_eng/sik_s-69.php

Blaze1

[GGTharos]

There you go.

[Vekkinho]

Originally Posted by Blaze1

Thanks GGTharos

I did some digging around and found this: http://aeronode.com/aero/18/sikorsky...run-in-october
Also this: http://www.aviastar.org/helicopters_eng/sik_s-69.php

Blaze1

Nice find!

[Udat]

Here is an old NASA article on Coaxial rotor systems: https://ntrs.nasa.gov/archive/nasa/c...9970015550.pdf

[ricktoberfest]

Almost as old as this thread!


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