Half a croissant, on a plate, with a sign in front of it saying '50c'
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steampunk flying saucer.
  [vote for,

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.

FlyingToaster, Sep 01 2017

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]


       I have no idea whether this would fly, but I love it. How large a butterfly net will I need?
pertinax, Sep 02 2017

       For the idea ? or the author.   

       It should fly : (regular) ornithopters are available as flying models, and a university has built and flown both human and engine-powered vehicles.   

       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.
FlyingToaster, Sep 02 2017

       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.
RayfordSteele, Sep 02 2017

       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.
FlyingToaster, Sep 02 2017

       A couple of trimed wobble boards attached to model helicopter must be just the test. A sound idea for built up areas.
wjt, Sep 03 2017

       I'm sure that some configuration matching this description could be made to fly. It would definitely be cool to watch.   

       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.
scad mientist, Sep 03 2017

       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.   

       But MEMS would certainly be the pro version.
FlyingToaster, Sep 03 2017

       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
beanangel, Sep 05 2017

       You could do that with the right sort of POV lighting effects.
RayfordSteele, Sep 05 2017


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