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simen doing bowie

Simple Air Vane Motor

by svale, published

simen doing bowie
Simple Air Vane Motor by svale May 16, 2009

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Description

After seeing some kids playing with a little air plane powered by compressed air from a soda bottle, I decided to see if I could make a laser cuttable version of such a motor.

This is not a very powerful or efficient motor, but it is a fully working printable ("cuttable"?) air vane motor. My next goal will be to make a full printable bottle-powered park-flyer.

A video of the motor in action: youtube.com/watch?v=reaB0R9ALHs

More on air vane motors:
hydraulicspneumatics.com/200/TechZone/FluidPowerAcces/Article/True/6422/TechZone-FluidPowerAcces

Matt made a version for 3D printers. You can find it here: thingiverse.com/thing:620

Recent Comments

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Hi all, I had a shot at making this. I cut a gasket type thing out of acetate too to the same pattern as the middle ring, to increase the seperation therein to give some space for the rotor to move. That's the part that you see in my photo above. Otherwise the thing looks just like everyone elses - I got a heck of a lot of leakage from the central hole, where the rotor pivots around a bolt. Any nifty solutions for that?

you know what i just realized, in my excitement to build this i realized i left out the most import part of a air vane motor, the vanes!, stupid me i just realized i didnt create that i created a turbine, :-E OOPS! lol

The bearing turbine didnt workout too well, i was having clearance problems i couldnt find and it was having problems spinning freely so i switched back to the non bearing one for now, it spins free enough that i can just blow into the hole with my mouth as shown in the video.

Video here:

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License

Public Domain
Simple Air Vane Motor by svale is licensed under the Public Domain license.

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Instructions

The laser cutter ponoko used to produce this left small "pixelated" indentations along all curves (see image). No big deal, except the vanes need to slide unimpeded along the inner ring, so it had to be sanded and polished manually for the motor to work.

The screw holes are superflous as the acrylic does not really seal well by just screwing the three layers together. I had to glue them with generous amount of Faller Expert Plastic Cement anyway.

I also sanded the sides of the rotor slightly to decrease friction.

For propellant I used a can of common Dust Off.

Comments

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Anonymous on Oct 26, 2009 said:

Hi all, I had a shot at making this. I cut a gasket type thing out of acetate too to the same pattern as the middle ring, to increase the seperation therein to give some space for the rotor to move. That's the part that you see in my photo above. Otherwise the thing looks just like everyone elses - I got a heck of a lot of leakage from the central hole, where the rotor pivots around a bolt. Any nifty solutions for that?

daewootech on Jun 6, 2009 said:

you know what i just realized, in my excitement to build this i realized i left out the most import part of a air vane motor, the vanes!, stupid me i just realized i didnt create that i created a turbine, :-E OOPS! lol

daewootech on Jun 5, 2009 said:

So i ended up spending a good portion of the day fiddling with this :-D I first modified the design a bit by spiraling the turbine to allow more airflow, then i modified the exhaust ports to scale larger in 20% increments until the last one is 200% larger than the first. Then i changed the scale of the turbine, it was originaly 1.41 inches but i saw in the plans it would fit snug at 1.45 so i scaled it up larger for a better fit. then assembled it and realized it didnt spin to well, the material was all the same size which means the turbine would rub against thewalls, so i made two spacers the same thickness as the washers i had and put washers on either side of the turbine after that i drilled out all the holes to fit the #6 screws that i had. screwed it together with 6 brass #6 screws and the middle with the same. It works pretty awesome at arond 20-50 psi with the air compressor, but it started to spin so fast that it was vibrating, i thought where the screw touched the turbine, so i recreated the turbine with a larger center hole (~.31in) and stuck a bearing i had laying around. :-D

Anonymous on Jun 6, 2009 said:

Brilliant improvements beautifully executed! I'd really like to see a video of this running!

As you see I had to sand my rotor to make it slightly thinner than the container, but your solution with the rubber gasket and even a bearing is really, really nice! I would think curving the channels for the vanes would create more friction as the vanes are moving back and forth. You had no trouble with that?

Now a great thingiverse-feature would be for you to be able to upload your revised files with your derivative.

daewootech on Jun 4, 2009 said:

looks cool, i might just make one of these today, although with a few "Modifications" i have in mind :-P

i would also love to see one of these made with a Reuleaux trialgle, kind of like in a Wankel engine :-D

Anonymous on May 18, 2009 said:

Very cool, I had just made my own version of this idea. Mine was not at all successful, as it leaked much more than it ought to.

Anonymous on May 19, 2009 said:

I also just notice that mine seems larger than your picture would imply. Mine has a diameter of 4+1/4". In case that matters.

Anonymous on May 18, 2009 said:

I had to use lots of plastic cement to seal the cylinder, and after it had all set I had to do one more round of cement along all the external seams before it would start.

4volt on May 17, 2009 said:

What are you using as compressed air, Is it a cleaning duster bottle?

Anonymous on May 17, 2009 said:

Yes. CRC Dust Off.

Batist on May 16, 2009 said:

When I see this, I'm dreaming about a steam powered RepRap :-)
Great!

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