Future Rotorcraft Concept

[Intermesher]

The following link is to a picture of a proposed future rotorcraft.

http://rotored.arc.nasa.gov/activity/HiSpeedRotor.html

This craft utilizes the Reverse Velocity Rotor Concept. The link

http://www.brazd.ru/books/ahs58/book/58af089.pdf

provides an overview of its features.

Are then any participants on this forum that would enjoy using this proposal as the basis for discussing the pro and cons of its features?

 

[Intermesher]

FranAle

It the helicopter was able to make the transition into an autorotative descent, the rotor would be able to descend and land in a conventional manner. In other words, it will have regained full roll control. I see the significant problem as being the potential inability to make it from cruise to autorotation.

There is another problem, which was not mentioned in the previous posts. The rotor turns at 50% NR (RRPM) during cruse and at 100% NR during hover. This means that the 'driving regions' on the two effective quadrants of the rotor disk have the added function of bringing up the rotor speed, during transition and before the blades fold up.


Open for scathing rebuttals.