- White Belt
- Posts: 28
- Joined: Thu Oct 21, 2010 6:02 am
Yes, it will still maintain collective pitch with the use of a thrust bearing assembly. The airframe is seperated into 2 different frames and joined with a gimbal or spherical bearing assembly. I drew up both configurations to see which is better. All of the rotor system, mast/reduction drive, power plant, and tail boom tilt as one unit with the pilot seat as the seat is attached to both airframes with spherical bearings. The collective pitch stick must be canted over the left leg of the pilot to prevent unwanted change in collective pitch during forward/aft tilting. The weight of the pilot facilitates positive control when tilting the upper airframe. The mechanical ability to perform auto-rotation is a must. The GEN H4 and Airscooter are fixed pitch rotorcraft....bad idea even though they fly well with the GEN H4 using a gimbal and the Airscooter using a CV joint. The GEN H4 at least can land safely on 2 of the 4 power plants. In my rotor design, the "Human Interface" or pilot moving with the rotor system as well the gimbaled airframes are my efforts to have tilt mast control for directional flight and maintaining collective pitch. Charles Siebel designed, built and flew a weight shift helo and in his airframe the cockpit slide forward, aft, etc thereby changining the CG for directional control. One draw back was it had a tendency to flip over in a low hover when the CG was manipulated a certain way. Not sure why, but he negated this result by adding "training wheels" for lack of a better phrase. They were struts that extended out to the flanks of the airframe. It did the trick. With my design I'm trying to "flex" the CG in conjunction with tilting the mast rather than a linear shift in weight. The first phase is a simple airframe that only tilts forward/aft to verify the validity of mechanical morphing airframes. There will be a slight drift in a hover caused from the thrust of the tail rotor as there will not be lateral tilt in the 1st configuration. The 2nd phase is a larger gas powered airframe that will tilt laterally as well as forward/aft.
Stay in touch. I'm really intrigued by your design.