SpudFiles

The first one i built was a pneumatic (ill post pic later), then i built the mini combustion and then my big combustion just last week.
Ill start with my mini combustion, I used:
-a chapstick container
-a pen tube
-a bit of electrical tape
-a long-nose lighters, igniter
- 2 thumb tacks
and thats about it
Heres my mini, next to a quarter.
Here you can see the green thumbtacks and the white igniter, and the rest which is pretty much self explanitory:P

Inside the mini's chamber (kinda blurred)

With that set-up it'll fired a spit ball 70 ft and hurt up to ~12ft (havnt tested it yet too much)

Heres my pride and joy... If you could call it that. I respect this thing pretty big. After its first test today, it show'd it wasnt a wuss.
I havnt put a real projectile in it just yet, i will tomorrow (june.7.08 ). Anyways with the tiniest bit of back pressure(I put a rag in it and paper towel after) , the thing is craaaazy loud.
Im talkin, OMMFG HoLy CwAp loud. yea. Anyways i used:
~1.5ft of 3" ABS Sch40 for my chamber
~5ft of 1.5" ABS Sch40 for the barrel
and connecting it all was a
3" to 1.5" reducer
3" coupling
3"cleanout adapter setup
Ignition is obtained via:
a Centro BBQ Electronic Ignition unit
and 3/8" bolt/nut/washer set-up for electrodes
Here it is standing its mighty 6.5ft height

The igniton box plus the toggle switch(on the left of the chamber) that I can move around

The electrode set-up


So yea, hope you enjoyed the write up! These spud guns are alot of fun, but i can see where it can get ya in alot of trouble:D

Anyways if you have any questions let me know, until then
have a good one.

Canuck

abs...you must live in canada , glad to another

Nice efforts for your first guns. Your large gun is proportioned well for good performance. I'm not a "mini" man at all so..........

You did a pretty fair job on your presentation. However, I would like to encourage you to use better sentence/paragraph structure, capitalization and proper punctuation. It doesn't have to be perfect but it will pay off in respect from fellow Spudfilers.

Two thumbs up good to see the spudding community is getting bigger

lol, yea, I wrote up the article last night, and was kinda tired. Thanks for the comments and advice so far! I only used ABS because I heard it was better for combustions, my pneumatic is made of Sch40 PVC Yes I am Canadian.

Isn't your barrel a little long? And do you by any chance...live in Vancouver, or near the area?

Im in Ontario actually kinda far away, lol.
and yes my barrel is probably too long. the barrel is like 5-6ft long for a 1-1.5ft chamber. What length of barrel would you guys reccomend?
Today wasnt too much of a success. It fires but only about 100ft (rocks with a paper block behind it) . I was using 99% Rubbing alcohol, which works pretty good, not good enough though. Theres a product called "Hero anti-static and has all the flamable warnings on it. Is that the same as Static Guard?

Canuck

Haha, it's because I live in Richmond and our hockey team is called the Vancouver Canucks. How long is your barrel?

lol, yea I get that question alot, as I use it as my username often. I always thought of it as another way of saying Canadian .
The barrel length is 5 ft. Probably a bit too long?

Canuck wrote:I always thought of it as another way of saying Canadian .

Indeed it is ... for lots of people...aye?...

Its "eh" actually :P

Canuck wrote:Its "eh" actually :P

Thanks! I was actually wondering what the "official" spelling of that was.

Yea, it's "eh" pronounced as "aye". And yes, I think the barrel is a little too long. It also depends on your ammo though...so, what are you firing?

Actually I think your barrel is fine, unless you just want a shorter one for logistical reasons.

I've moved to golfballs mostly, some potatos occasionally, a tennis ball once in a blue moon...nothing!! (just a noise cannon).

You're lucky you have 1 1/2" PVC in your local hardware stores...all I have is fittings...