yeah you should probably put some o-rings on it for a good seal, but it'll only leak for a very short period of time since all the gas is out the barrel in probably less than a second( depending on your c:b ratio it might be a bit more). for optomal performance i would put o-rings on it but they're ...

sound great. can't wait for some pics.

ok well i got one of my designs to work. now the problem is that the blades open the moment it leaves the barrel and so it doesn't get very high up. does anyone have any sugestions as how i could fix this or or is there now was to do it on sech a small scale?

Edit: sry for the double post

oh ok
what i'm wondering is how thw blades fold out. do they? if they dont they look like they would fall straight down but idk. i tried a grocery bag with string but it jamed lol. i'll have to try folding it another way but it got dark before i could.

ya something like that but i would prefer to make my own
i wonder what the blades are made of?

ok well i have a 1/2inch barrel on my cannon but i'm wondering if its posible to make a parachute or helicopter round small enought that still works right to fit. has anyone done this or a plan that might work. some sujestions are highly apreciated.

those bbs are used in blowguns that they sell right next to them. friend has one and it sure is fun.

all you have to do is split something that fits in your barrel into 4 (or however many you wish). then atatch a corner to each part. the thing reforms into its original shape when brought together in the barrel but when it's fired it should fly apart thus opening the net that is atatched to it. p.s....

rebar fits very well in 1/2 inch pvc but my cannon isn't strong enough to launch the rebar but a high powered copper one would probably work well.

i have a 1 inch like that and it works with one 9 volt batery, so 12v should work fine.

Edit: darn i got beaten to it.

you mean like a blow back bolt?

i believe people have already done that before.

ya it would push the projectile further down the barrel before the valve is opened thus creating dead space.

there is 3/16, 1/4 , and 6 mm from what i've seen but there migt be more

mine is a sprinkler valve and it operates at 30 psi (parents won't let me go higher )

well the piston is gona be a 1inch piston so not very smal but still.

will the blow gun design work better even though it has a way biger pilot volume?