Sikorsky-Boeing #SB1 Defiant Completes First Flight

[Doshy]

https://www.youtube.com/watch?v=Sm-N7trI0sw&fe...

[FourWheelDrift]

When the rear prop starts so does the Airwolf theme music.

[AnotherClarkey]

Kamov must be feeling flattered.

[lufbramatt]

Reminds me of

https://m.youtube.com/watch?v=ycXEgIRWGqs

[dvs_dave]

So a top speed of almost 300mph. Impressive. Presumably due to the contra-rotating rotor it’s able to maintain equal lift across the rotor at high forward airspeed. But at the same time keep the rotor rpm low enough so as to not exceed supersonic airflow over the advancing blade, and being able to tolerate retreating blade stall (or even reverse flow) without any ill effects.

Is the pusher prop primarily to improve acceleration and deceleration without having to pitch the aircraft, or does it have other advantages?

Edited by dvs_dave on Tuesday 23 April 05:32

Edited by dvs_dave on Tuesday 23 April 05:34

[SVX]

That looks like the outcome of an unholy tryst between a Kamov and Red October It'll be interesting to see how this develops, and what the intended uses for the platform are.