h a l f b a k e r yI think this would be a great thing to not do.
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A spinning rotary wing, comprised of ornithoptering blades,
that
requires no
rotor, no empennage, no counter-rotating anything : just a
single complex assemblage.
For machines with more than two blades, the cycle points are staggered for a smoother flight (ie: they're all at different points
in their cycle).
flappity flappity flappity flappity.
https://en.wikipedia.org/wiki/Ornithopter
[FlyingToaster, Sep 02 2017]
Ornithopter in flight
https://www.youtube...watch?v=a-qS7oN-3tA
[FlyingToaster, Sep 02 2017]
regards to
Flying_20blade_20helicopter
put ailerons on the blades to power articulation. [FlyingToaster, Sep 02 2017]
Forget the rotation
https://www.festo.c.../bionicopter-SD.mp4
Flappy enough?. A scale model of something on Lexx's extrapolation. [wjt, Sep 03 2017]
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Annotation:
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I have no idea whether this would fly, but I love it. How large a
butterfly net will I need? |
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For the idea ? or the author. |
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It should fly : (regular) ornithopters are available as flying models, and a university has built and flown both human and engine-powered vehicles. |
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Like a helicopter, it has 2 or more wings attached to a hub ; unlike a regular helicopter where the hub pushes against the fuselage to turn, the wings push themselves... topographically like a tip-jet 'copter. |
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I really have no idea if this would fly or not. My gut is
saying no, an ornithopter needs to push against the wind to
generate thrust as well as lift; here the thrust simply spins
the blades faster. What lifting force that would otherwise
result seems lost. But I could be wrong. |
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Well, obviously the wings would be designed specifically for
the application. It's not difficult to imagine the outer
portions of the blade doing most of the work : like a
helicopter, the bit closest the axis doesn't do much: not
enough speed or room to work. |
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A couple of trimed wobble boards attached to model helicopter must be just the test. A sound idea for built up areas. |
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I'm sure that some configuration matching this description
could be made to fly. It would definitely be cool to watch. |
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I wonder if it might be useful on an extremely small scale. I
have the impression that it is much easier to create a
flapping motion with MEMS than to create a MEMS motor
coupled to a propeller. But pure flapping flight is pretty
tricky. By putting enough wings around a rigid ring, the
oscillations get canceled out. |
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There's possibly a solid airfoil that could be useful for the entire flap sequence, but I had in mind each blade having a few adjustable spars to cycle it through different airfoils for different AoA's - that and a cotton or clear-mylar skin would give it the required steampunky/DaVinci look. |
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But MEMS would certainly be the pro version. |
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completely non-flapping, but I would like to see a computer stabilized flying muffin fan where the outer rim is stationary. make it round and it looks like a UFO with a fan in the middle |
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You could do that with the right sort of POV lighting effects. |
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