what pressure would you run it at?

and how does it compare to a combustion

aright cool guys

thanks

aright ill go pnuematic then...should i keep the same ratio (.8:1) or is the ratio supposed to be different???

also the bend from the chamber to the barrel has no effect right??

yeah tahts what i was thinking that it wouldnt be very powerful...


the chamber volume is 6.28 cu. in....102.91ml

should it be bigger and mae the barrel bigger too to keep the .8:1 ratio

hey dude i would actually be interested in this if you still have enough ambition to do it...

seeing some of the rosponses you got ...you may not have enough ambition now

im sure it would help out plenty of people...except for the "know-it-alls" of course

if the pressure is at 21.5 psi with a 3/8 meter pipe it will give me a length of 1 inch...

will a 1 inch meter pipe be ok and will 21.5 psi be enough pressure to empty all the propane into the chamber?

I am making my first propane gun...i made some rough plans for it...i know the chamber size and barrel length and the amount of propane but i dont know the meter pipe length yet because i need to figure out a pressure to run it at... barrel = 40" x .5" combustion = 8" x 1' amount of propane in chamb...

Aright cool thanks guys. Now that i think about it, that is quite an obvious solution. What pressure would you guys recommend. Or how long of a meter pipe would you recommend and i can get the pressure from there. Also one more question now. This is possible to have the porpane tank, the meter pipe ...

I have made many potato guns and that have all been combustion with hairspray. Now I want to make a combustion gun using propane. I have read up on all the propane injection stuff and started to plan out my gun. It is supposed to be a sniper. here are the specs I wanted: barrel = 40" x .5" \ -------...

is it volume (c):volume (b) ...if your combustion has a bigger diameter than your barrel than you would want volume of the chamber to the volume of the barrel to be .8:1??? but if the cumbustion and the barrel is the same diameter than you can just do lenght to length rather than volume right? sorry...

umm i got the tape at wal-mart for like 3 or 4 bucks...its was in the hunting section and it is made to go on guns, bows, tree stands ect...I couldnt find the exact product i used but this is similar... http://www.summitstands.com/productDetail.aspx?id=329178 im guessing your wal-mart will have the ...

ok im going to clear this up...it is a camo tape but it is made to look ragged so it looks like leaves and stuff

lol

thanks for comments guys

i shot a raquet ball in my 2 incher...i needed dish soap to squeeze it in and it took like 10 mins to get it in...when i shot it the back of the combustion chamber actually shot off....it hit me in the hand and cut it pretty good...so i dont think its a good idea to shoot raquet balls because its so...

This is about our 4th gun I think. This is a really short gun and the barrel detatches for further portibilty. We just hooked up a male and female thread system where the barrel meets the combustion chamber. As you can see we attached handles to it to make it more like a gun. There are no holes dril...