Compressed Air Motor

hi · Fri Apr 27, 2007 12:29 am

i think i might make one out of copper (will that work?). i might use two 12 gram co2 adaptors with some 1/8'' copper pipe to get the co2 to the motor and a ball valve to control the flow. i think ill use a ball barring for the ball and a bolt to push the ball up. then maybe a bushing that the ball barring sits on, it doesnt have to be a 100% seal doesnt it? it looks simple enough, i remember wanting to make one because i used to have an air hog, i almost kicked myself 4 years later for throwing it away.

there was a size of copper end cap that fit perfectly in another size of copper pipe, does anyone know that it was? i think it was 3/4'' end cap in a 1'' or 1.25' pipe, but i really dont remember.

will copper pipe stand up to the pressure?

shud_b_rite · Fri Apr 27, 2007 12:35 am

HOLY MOLY. Meatballs our minds must be linked together or something because I was thinking about doing the exact same thing yesterday. That is why I posted that topic about liquid nitrogen.

I was planning on making a steam engine type motor to run on compressed air but I dont have the right equipment or tools. I would really like to see what you come up with if you ever build this. Good luck

meatballs · Fri Apr 27, 2007 5:57 pm

hi i did the exact same thing. used to have an air hogs airplane. loved it. then the wings broke for good after hitting its thousandth tree. i saw no use for it and threw it away. now i REALLY wish i didn't. No it doesn't have to be a perfect seal, and if you use a design similar to the diagram on page one of this topic, a small leak might be better than a perfect seal since it would compress air on the way back to the valve assembly at the top. not sure about that one, but i know it doesn't have to be a perfect seal. i've thought of the end cap idea, and a 3/4 inch pvc cap fits perfectly in 1 1/4 inch pipe (w/ o-rings) but thats the wrong material and sizes. i like the idea of an end cap though.
SpudBlaster15 what did you make your engine out of? i built one using that principle out of legos. hooked up to a vacuum cleaner it got to a maximum of 860 rpm (measured with a tachometer).

Also, does anyone know what presssure an air hogs airplane runs at?

hi · Fri Apr 27, 2007 6:07 pm

mine hade a gauge, but it was just green, yellow, and red, but i was 10 years old and could pump it and the chamber was only about as thick as a 2 litter bottle, so my guess is 50-70psi, and it ran for about 45 seconds- a minute. Thats what i remember, it could have been longer. i remember i had two, one flew much faster than the other, but they had the same motor.

meatballs · Fri Apr 27, 2007 6:15 pm

yeah, mine had the same gauge with min and max pressure measured. i still have the pump, and i suppose i might be able to get it hooked up to a gauge or something. i might try that. it would be a pain tho, since its not a standard sized thread or anything. I'd like to find out some easier way.

hi · Fri Apr 27, 2007 7:12 pm

i dont remember what i was the threads/ fill valve was, but just use a hose and hose clamps, for 60 psi you really dont need threads.

meatballs · Fri Apr 27, 2007 10:50 pm

good point, didn't think of that. i just want to get a psi valve on there so i can see what 'max' is in psi.

jon_89 · Sat Apr 28, 2007 1:38 am

do you think one of these could power a scooter (stupid)?

Insomniac · Sat Apr 28, 2007 1:43 am

The air hogs firestormer airplane runs at 80 psi (it says it on the back of the box)
Also, I found out that you can unscrew the engine from the tank and screw it onto a coke bottle. The threads are perfect and it has a perfect seal.

jackssmirkingrevenge · Sat Apr 28, 2007 1:44 am

jon_89 wrote:do you think one of these could power a scooter (stupid)?

It could power a car if you make it big enough

Orpackrat · Sat Apr 28, 2007 2:04 am

http://surpluscenter.com/item.asp?UID=2 ... atname=air

shud_b_rite · Sat Apr 28, 2007 5:00 am

So someone that has got one of these motors or an air hog one. How long do you think it would go for on a 1.5L coke bottle at 80psi?

lukemc · Sat Apr 28, 2007 6:08 am

i dont knw but i have an air hog one thats tank ia like .5 liter and it runs like a muinite and a half

SpudBlaster15 · Sat Apr 28, 2007 12:19 pm

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras nec placerat erat. Vivamus dapibus egestas nunc, at eleifend neque. Suspendisse potenti. Sed dictum lacus eu nisl pretium vehicula. Ut faucibus hendrerit nisi. Integer ultricies orci eu ultrices malesuada. Fusce id mauris risus. Suspendisse finibus ligula et nisl rutrum efficitur. Vestibulum posuere erat pellentesque ornare venenatis. Integer commodo fermentum tortor in pharetra. Proin scelerisque consectetur posuere. Vestibulum molestie augue ac nibh feugiat scelerisque. Sed aliquet a nunc in mattis.

meatballs · Sat Apr 28, 2007 2:37 pm

hmmm, well that wont work for me as i have neither a lathe nor steel and brass stock. that's truly brilliant to put an air hogs engine on a coke bottle, how long does it run like that? does anyone have an air hogs motor that they dont want/need? i might post something about that in the classifieds...

Compressed Air Motor

Donating Members