I made significant changes to the airframe to lower the center of gravity. Both electric motors are still good. Still trying to track down a suitable mixer/speed controller. When I first started this prototype, I did not take into account the servo spacing. My patent drawing are for a manned platform. The servo pushes the upper airframe about 1 inch higher than it should be, displacing the weight and CG in a vertical manner. There is also a good chance that this is also what caused the torsion flex in the airframe and failure during the first tethered flight.
Regards,
Dave
Simply a link for VTOL and similar rotorcraft, but mostly unproven and proven designs with a particular interest in morphing aero-structures and Human-machine interface.
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