The perfect VTOL aircraft design has been the desire of many an aerospace engineer, a flying machine which can go from vertical takeoff to high-speed flight flawlessly, efficiently, and effortlessly. The challenge is quite significant. I'd like to talk to one such strategy. I would like to speak and discuss with you a two bladed vertical rotor blade where the blades turn into wings and the aircraft continues forward after a transitional flight phase. I think I have a solution to this problem and I'd like to discuss it with you.
First, I suggest we use three blades and not two. This would allow the rotor blades when stopped to be forward swept, with the third blade facing back down the fuselage. If it were turned vertical, the third blade that is, it could act as a fan or vertical stabilizer. If the intake to the main engine was behind that vertical blade it would funnel all of the airflow from the forward swept wings along that blade on both sides into the intake realigning the relative wind and allowing for maximum airflow.
A three bladed helicopter of this type could accelerate to just under 200 knots, and then go through it's transitional flight phase by slowing the blades to zero, the third rotor blade would turn vertical first to give the aircraft more stability in forward flight preventing him from rolling over the rotor blade with a trailing edge facing forward would disengage and flip which would happen extremely rapidly and click back into place.
At this point the aircraft would have to swept wings and a new vertical stabilizer to go at extremely high speeds and that would solve the problem. The two bladed design with the wide rotor wings doesn't seem to work very well, and has tremendous problems with transitional flight, causing the many prototypes using this strategy to crash and burn. Such a re-modification with three rotor blades could be just what we need for unmanned aerial vehicles of this type which could travel at super high airspeeds and be capable of vertical takeoff and landing.
The rotor blades would have to spin extremely fast and be somewhat shorter and thinner than traditional rotor helicopter blades. Perhaps with new materials the future the rotor blades can also be shape shifting adding another dimension to this concept and solution for VTOL aircraft. Indeed I hope you will please consider this if you are an aerospace engineer, because I think the solution is quite viable.
Lance Winslow has launched a new provocative series of eBooks on Future Aircraft Concepts. Lance Winslow is a retired Founder of a Nationwide Franchise Chain, and now runs the Online Think Tank; http://www.worldthinktank.net/
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