i got the 40mm od stuff i rushed my research and brought the wrong stuff.

great guns , i cant usually be bothered with painting so mine usually end up with that "duct tape and chewing gum" look this will proberly be no different

thanks every one. did not really think about where i was going to get them but thanks for the links. i did have a look at yours MrCrowley but i stuffed up i misread what barrel you used for the nerf so i got the 40mm pipe :oops: so this will have to be a golf ball prototype. but i got class 12 pipe ...

I am building hopefully improved version of the paint ball rocket launcher (reloading after every shot? what is with that) and was wondering how long i should make the shells to fit a pocket nerf foot ball?

crap, i didn't think about keeping the insides cold. oh well it was too heavy even when empty to move around. looks like i will have to add a lock and turn it in to a soda safe(funny jrrdw). i will have to build a short law style launcher with replica rockets. great idea sthrone, i will try to add i...

i found this in the shed when replacing the benches i don't know where my dad got it from. I was wondering what was in it? the only markings are 'RMWC C2351 1942' it is about just over 1m long 30 cm wide about 15cm deep was painted a dark green http://i304.photobucket.com/albums/nn170/purcey/P511000...

sorry about the late response got stuck with a urgent job at work so i had to work late and i still have to work the fucking weekend. You could go the BTB route and make a massive popoff valve as your main firing valve if this is for a small calibre Wink Building my own valve, Great idea. I had a qu...

sounds good i have to finish a gun first, i tend to frankenstein any that are finished when building some thing new.

did you order your qev from smc or go in to the shop?

smc address: Perth Cnr Daly & Resolution Drive PO Box 143 Belmont WA 6104 Cnr Daly & Resolution Drive are actually in Ascot so i think them made a mistake, turns out they are about 5mins from my office. i also have to get a small ram and a pop off valve hope they sell them. if i cant get it at smc i...

Great idea, you might want to re direct the exhaust in case some leaked gas ignites your face.

i cant see closing being a problem because i will fill from behind the diaphragm. i think opening will be a bigger problem.

any one know the pressure a compressor pop off valve would activate at?

what do you mean seat fast enough? i know qevs need less change in pressure to open so they would be a better choice, but i cant be arsed ordering one over the net so if this store is close i will certainly get one. well considering i drive from Joondalup to Belmont every day it is most likely close...

G'day everyone it's been a long time. Any way i am back and looking at building an auto some thing like this http://www.spudfiles.com/forums/full-auto-marble-gun-t4108.html I need some advice on pressure relief valves: can they pilot a sprinkler valve? or will i need a Q.E.V.? what pressure will the...

G'day fellow west Aussie i got your pm

i was surprised how well that worked well done.

think it would make a difference on this cannon?
chamber 150mm x 500mm
barrel 50mm x 1000mm
even for a combustion it is awesomely loud (ears ringing for 5 mins)

1. It can spontaneously detonate, even in the absence of oxygen or air. It is so prone to autodetonation that a cylinder of compressed acetylene has to have several things added to it to keep the tank from detonating all by itself (usually a mixture of acetone and crushed brick IIRC). acetylene wil...

no. don't mess with acetlene and oxygen unless you like pipe lodged in vital organs.