The "X"'s are just deviders

When I make it a hybrid I wouldnt take it about 2x or mabye 3x

yes I know my avitar is messed.

I dont quite know what DDT is. Can anyone explain?

yes my GF is amazing and sometimes I think her dad is quite using his brain.

Thanks

The first shot she admitted defeat. so after winning I didn't care if the gun broke cause I'll have time to fix it. so I lubed another potato with vegetable oil shoved it it and strapped the mapp gas bottle to it. The whole gun all 19 feet of it kicked back probably 2-3 feet. it was so beautiful ...

Thank you all, Never shot it at anything, Parents concern, the competition was a challenge from my Girlfriend to see who could build a potato gun that shot further.

Yes i won. she showed up on launch day with a 1:1 3foot barrel 3 inch chamber and propane. (never shot) her dad wanted to put oxygen ...

So at the beginning of the year I posted something about the combustion competition. and Hear it is.

Chamber:
42"x4"
120,000 volt taser
2 spark gaps
Chamber Fan
Metered Mapp or Propane (mapp)

Barrel:
15' (feet)x 2"
beech load

Its a pretty basic gun, fun to so off.

WHY? why not just do it with less pieces and use pvc?

Yeah paint would be the next step but I have a deadline to meat on my next gun take a look and say your thoughts....

http://www.spudfiles.com/forums/combust ... 12113.html

Thanks guys!

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

I like the way From_Hamsterdam put it. Its defiantly not an option in my book.

Wow thanks, regulations are its has to be under $100 and a 2" barrel firing a potato and thats pretty much it I don't know really how burst disk works and how much it costs. I just picked up a 41" of 4" sch. 40 ABS for free and figured That would make a nice camber. And I've decided to go with MAPP ...

again great first gun i had one more question is that thing on the end an actual scilencer or is it just for looks or both

Yes This is an actual silencer and it does help but I just had some leftover pipe and was bored one day. Its very comfortable to shoot but I can only get one shot out of it ...

Why do you suggest that I mod the sprinkler valve? is it faster? it shoots fast especially at 120 psi. Would ruin someones day. lol

Yes Ive been to burntlakte and read all their stuff. I know the c:b ratio is High but I'm not really looking for efficiency. I guess it could be alot lower like 1:1 but I figued if I waste a little potential energy then the potato would be at maximum kinetic energy by the end of the barrel.

My First Pneumatic air gun-

1" pvc
2" air Chamber
interchangeable barrels
-36" 1" barrel
-30" 3/4" barrel

Ammo:

3/4" Rubber Stoppers 41 cents
(Parents Concern)

1" broom handle segments

Ive done some research and Ive found that pneumatics are a lot more powerful but part of the bet was it has to be a combustion gun

So this is my first post and new to spudfiles but I'm not new to spudding. Ive built a pneumatic gun that will be on here soon and as human male instinct It has to get bigger and better. I made a bet with my girlfriend and her dad that I could a better spud gun then they could and so the competition ...