The design would work, but you have to cosider: a) The pilot pipe has to be flush with the inside, or far enough back to allow enough piston travel. I do not encourage the latter option though. b) Once the piston has traveled past the pilot, obviously it cant pilot any further as it is sealed off by...

Shes a beauty. I love the compact rifle-like look to it (even if its a bit crazy )
Great work

hah no macho jocks eh?

that's the kind of stuff I live for.

sports is all I really go to school for. besides being forced to listen to ben stein all day.

Are you a jock? I really dislike jocks They make me sick!

(this wasnt meant to offend anyone)

I,m not sure I want to go supersonic like his.

Why not?

Holy moley! I am honoured to be the firdt post for this amazing machine. I am truly astounded by its crazy awesomeness... wow!

EDIT: damn you hubb, you beat me!

Thats really decent because I can get 450mls of it for R45 (about $6) which goes a long way. I think I may experiment with it a bit.

Whilst we on epoxies and pastes vs resins I have this: I know that epoxy resin works well, but has anybody tried fibreglass resin, or do you think it would work; because it is a load cheaper! I have used it for my surfboard and a few molds, so I was just wondering. (sorry for the slight thread hijac...

That design looks pretty good, but does that piston really need the guide rods?

LOL, the government are going to be shocked by this sudden influx of holey coins

Note, I edited my above mistake. Sorry.
I agree that epoxy is nicer for shaping purposes, so perhaps my vote has swung due to JSR's persuasive skills [/sarcasm] J/K

watch out buying the lube though, I went to buy some ky for a piston cannon, and the stupid woman wouldn't sell it to me cause she said, and i quote, women-"your too young to need lube, I've seen you young people with all sorts of fluids dripping out of you'll, save some money and use those" me-"um...

I go to a catholic school... enough said

I am no proffessional at epoxy casting, but from my knowledge I give you: 1- yes, they are both non-natural materials, and therefor should not join into one another, but be sure to use some good lube (KY lube etc) that is water-based for best results 2- I think that epoxy is a better material for th...

The burst disk material also depends pn the pressure you want to raise it to. It can vary from stickytape to plastic boards.
I suggest *aluminium foil for this size, and if you want higher pressures, double over the foil

*Yay for the proper spelling of "aluminum" foil

And always remember, if the places you visit are crap, just mission over to South Africa, as you are most welcome here!

(You just earned my 1000th message )