nice. i am always looking at the possibiities of air.
its hard to find air motors. i was wanting to build an air powered car(ultralight) for a demo
but now i think i'll just get some cheap rotary sanders off ebay and mod them

you're building an air engine?

this one is for a pneumatic engine.

sorry i fixed it

this is just something i whipped up on big blue saw designer.
what do you think? the bolt holes are marked green and its assembled layer by layer(layer numbers at bottom.)
i designed it for an engine but you could use it for a semi auto valve
<a target="_blank" href="http://h.imagehost.org/download ...

you can make a chrony with 2 microphones and some software from the internet. google diy chronograph or something

the muchdiscussed venturi:
http://www.harborfreight.com/cpi/ctaf/D ... mber=66282

this saw:
http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=113
and this drill:
http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=94585
are great deals!
if you have the air to power them its cheaper then electric.

i havent tried them but they look awesome!

EDIT ...

you can use GIMP. its free and almost as good as photoshop.

i got a free die grinder with my new compressor(well not free but might as wel ave been)
i really want to get a venturi. maybe i'll build one!

p.s to suburban spudgunner if you want to REALLY scare the crap outta people you can build a trash can trauma. i'ts a monster on an air cylynder in a ...

use 2 burst disks at either end of a pipe. put the flour between them. i do it all the time for things like water,flour,TP,etc.

quite awesome indeed.

well i think a bolt action design would improve that alot. also 2.5 inch conduit should be fine for a barrel but not a tank. i mean, when have you guys ever heard of a pneumatic barrel explosion! but to use it for a tank would be bad.
so as long as no air is actually STORED it should be fine i think ...

well i bet a small scale of that wouldent be too hard.
wait, i think it would be. but a full motion tilt platform with 6 degrees of freedom could be built pretty easy i think. ultimate home videogaming!

nice. i like the aesthetics. i think direct air is better than a spring. i somehow doubt a spring could be more powerful than a compressed air source.
otherwise we'd all be building spring powered guns right? or maybe we just havent thought os it till now....