Parafoil Rotor Blade

Using Tyvek, ultrasonically welded to make an inflateable spar and a dual, above & third sized at the leading edge below parafoil bags which have control of the openings via a drawstring. This will allow overspeed for spinup and feathered blade for lower drag flight conditions. The need for a very low weight and strong material pointed to Tyvek as a cheap source, with several different thickness, flexibility & porousness. Ultrasonic welding provides a quick bonding method that does not require the holes stitching creates. Less holes, less chance of the material riping at these stress points.

Who will help me & fund these wings for Flugtag? Six CW & six CCW blades 7' long will lift 275lbs with 25 RRPM as the target natural resonant rotor speed. With the light frame and blades an HPA (Human Powered Aircraft) in the form of a BiRotor Air Bike is possible.

Help get us Flying

Flugtag Red Bull entry with no funds to build or place to assemble & test design of the future. This design uses a Bi-Rotor & Blended Wing & Body frame to hold a split canard & a variable tail. The twelve rotor blades are stitched or ultrasonicly welded Tyvek parafoils, six rotate CW (left side) and six rotate CCW (right side). Pedal power thru a five way transmition
to spinup, wheel drive, two thrust vectorable pusher props w/flex shafts.


I have some of the parts, need not so silent well off partner. The first production air bike could cost $45,000. If someone's really into this with me I can make
an automatic control once we have some sensors mounted around on the
airframe and rotor blades, I can put some data to my software and the PDA
will fly it for us. The ramp at Red Bull would be a good test, current record
160'.


bob_kaehler2001@yahoo.com



I wait for the phone to ring on the next generation of autorotational VTL flight.