The internet you just posted on was created from funds that were dispersed by DARPA (Defense Advanced Research Projects Agency), a US department of defense agency, the same agency that funded this work. If you don’t see the peacetime implications and uses of this technology (along with the internet), at least the US military does…

Regards.

absolutely understood what you meant to say, but in case others didn’t i wanted to clarify it. i think you have a point about reciprocation as opposed to rotary motors, but i had a couple thoughts on that.

first, you can use a solenoid or an electric motor arranged like a voice coil for excursion to get the reciprocating motion you want.

second, a simple sliding mechanism can be used to convert rotary motion into reciprocating motion (as the reverse happens in your gas engine, it should be pretty easy to see). you’re right, though, that you’re going to lose some of that motor efficiency as not as much of the output will be converted to thrust.

At the same time, clever use of the wings could up the efficiency pretty well — think like swimming. The wings would twist during the wing recovery phase so they gave almost no downward thrust.

I’m still waiting to see when they can add a second joint in the wing more like a bird – they’re not just for folding the wings up!

Also, one would think that a reciprocating motor, you’d lose alot of energy. Specifically one half. You’d have to not only power the piston in one direction but slow it down from the opposite direction. With a cranked motor, you only have to supply energy to maintain the rotation. You still have loss from the reciprocation of the crank, but with the design they use, all of that goes to thrust.

Damn, it was pretty nifty looking. Like a big headed Humming Bird with plumage.

And yeah, it was battery powered. Most likely Li-po. For obvious reasons. Ha.

@Dan Fruzzetti

Ha, sorry. I’m used to gas powered propulsion. (i.e. controls for increasing/decreasing throttle as to a direct relationship to increasing/decreasing thrust). But you understood what I meant to say.

is there a battery on that thing? or is it tethered.. i can’t make it out from the video.

For the rest of you – as already mentioned this is great for aerodynamic research; the closer we get to nature’s flight (or any) techniques, the better we understand how to improve our own.

because we do all agree: nature kicks man’s ass at engineering. so man has a tendency to try and learn from nature’s ridiculous talent.

It’s fantastic. Once we figure out how to make an engine that natively reciprocates (take out the crankshaft and hook directly into the piston?), there might even be room for competition between types.

perhaps an engine that natively reciprocates would need two fuels, one that combusts quickly and one that does it slowly; then if you had a simple weighted piston with combustion chambers above and below, you could speed or slow the ‘flapping’ of wings by varying the mixture of fuels in each trip of the piston.

I guess that makes sense and also seems like a bit of chaos theory could apply.

The tendency for flighted vehicles is the more unstable the craft the more overall maneuverability the craft has.

In R/C planes & helis, sport planes are far less stable than trainers and helis are less stable than sport planes.

No mechanical details, but by the looks of it, I’d be willing to bet that the wings themselves provide no more control than throttle.

I would venture to guess that it uses some sort of internal pendulum to control CG, and an internal dual axis gyro controlling it with a R/C override.

Just a guess.

Your helis are more controllable, but are also a much simple design, spinning wings the pitch.

a stander heli in nothing has to do with evolution of flight, you can just extend heli tech to a certain point, were the ornithopters resemble the technique used by insects, insects crash and don’t fall, they can fly fast or hover slow, change direction in a blink of an eye, this is great news, and in some time or in many years to come it will help in the evolution of flight and better understanding of aerodynamics…