Dining room light 1, Mr. Hickman 0. I've learned quite a bit from this coaxial set up with regard to my airframe design. Though I still have not achieved postive controlled flight, my trials and errors have raised questions.
The coaxial system w/ 2 fly bars works ok, but both fly bars need to
be leading edge to leading edge. Trailing edge to trailing edge causes
failure in the system.
When fly bars oriented leading edge to leading edge on both hubs are
integrated into my airframe the lift across the rotor discs is
reversed, so when the masts are tilted forward, the fly bars generate
more lift over the forward portion of the rotor discs and thrust
vectoring is negated a great deal causing it to fly aft. The small
scale that I've chosen does not have sufficient servo span of motion
to affect flight direction. Larger scale needed. Going back to the
single mast for now, but I'm not giving up. I've learned quite a bit
about this mechanical morphing airframe. So, with regard to the
coaxial, in theory if a have servos with more range of motion,
tilting the masts forward will cause aft flight and aft mast tilt,
forward flight, but it' s 180 degrees from my original intent which is
thrust vertoring and morphing airframe rotor disc control. I believe
that torsion bars for flapping, lead/lag would be better. I'm going to
keep tweaking both rotor system set ups.
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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