My sweet gun

Boom! The classic potato gun harnesses the combustion of flammable vapor. Show us your combustion spud gun and discuss fuels, ratios, safety, ignition systems, tools, and more.
Post Reply
User avatar
metallover
Private 4
Private 4
Posts: 95
Joined: Fri Apr 18, 2008 12:20 pm

Fri Apr 18, 2008 12:54 pm

Here is a thread about my new spud gun. It is nothing way too special, but It is respectable in my eyes...

Here is a picture of my OLD gun (the bbq ignitor was on the endcap)
Image
Here are some pictures of my NEW gun
Image
It cost 66.88 - I had enough by 11 cents! (we got lucky - they didnt charge us for the cleanout cap ;))
I also made a not yet working mini pneumatic gun with that wimpy barrel and puny ball valve
Image
Image

Where should I mount the schrader valve to fill the chamber with propane?

I dont have it yet, and I also need a propane fitting. I hope to pick those up by this weekend. I cant wait for the first test fire. =]

Someday I hope to get a chamber fan if it is too tame for me.

Any help is appreciated, Thanks
Last edited by metallover on Mon Apr 21, 2008 7:16 pm, edited 5 times in total.
Top
User avatar
Hubb
First Sergeant 2
First Sergeant 2
Posts: 2390
Joined: Mon May 28, 2007 8:39 am
Location: South Georgia
Contact:
Contact Hubb

Fri Apr 18, 2008 1:22 pm

Here's my launcher. I really like the handle design and it makes the launcher perfectly balanced.

As far as ratio, I went for .8:1. The reason; Burnt Latke did tests with a launcher very similar in size (which also happens to be very, very similar to the size you're wanting) and that seemed to be the best ratio. Including fittings (inline configuration), my barrel is 44" long. The ratio is not exact, but it is good enough to break bricks :wink:

As far as the meter, I've never built one seperate from the chamber, but am planning on doing so when I rebuild my hybrid. I don't see why it won't work.
Top
User avatar
metallover
Private 4
Private 4
Posts: 95
Joined: Fri Apr 18, 2008 12:20 pm

Fri Apr 18, 2008 1:30 pm

Here are some pictures of my propane meter. I used teflon tape on the threads on the bottom half of a standard propane torch. The top half threads off. With a really tight hoseclamp, it doesnt leak at all. I used 1/2" pressure rated hose.
Image
Image

I already had a propane torch and I didnt want to cut it up and make a fitting.

This is leak free!



I just realized I am in the wrong thread! can I have a moderator move me to the combustion cannon showcase? sorry, im a noob at this thread :oops:
Top
Post Reply

Return to “Combustion Cannons”