Login    Register
User Information
Username:
Password:
We are a free and open
community, all are welcome.
Click here to Register
Sponsored
Who is online

In total there are 62 users online :: 5 registered, 0 hidden and 57 guests


Most users ever online was 155 on Mon Aug 15, 2016 1:40 am

Registered users: Bing [Bot], Google [Bot], Google Adsense [Bot], MSNbot Media, Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

1.5"/17 (40mm) Spud Gun

Built a combustion cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
Sponsored 
  • Author
    Message

1.5"/17 (40mm) Spud Gun

Unread postAuthor: Flamex » Mon Oct 15, 2007 1:39 pm

Here is my first attempt at a spud gun. It uses a 3" Y pipe, 3" to 1.5" bushings and a 1.5" barrel. The barrel is suppressed, with a 2" pipe for the suppressor casing. The barrel is 28" long in all, but the effective length is 25" because of holes drilled in a 3" section of the pipe up front near the muzzle. A 1.5" ball valve is used for fuel entry, the use of which was inspired by utx's spud guns. A standard BBQ lighter is used for ignition, but there is room for future replacement with more reliable forms of igniter. I've purchased another 3' section of 2" pipe for a new suppressor casing, because the one I have installed now is too short for my liking, I had cut it too short. All piping and fittings are solid core ABS.

Image

Image

Image

Image

Image
  • 0

Last edited by Flamex on Mon Oct 15, 2007 1:54 pm, edited 1 time in total.

Flamex
Private
Private
 
Posts: 12
Joined: Sat Oct 06, 2007 1:40 am
Location: The Union Of Socialist Canadian Republics
Reputation: 0

Unread postAuthor: LikimysCrotchus5 » Mon Oct 15, 2007 1:49 pm

not bad pretty nice for a first. I would have gone with a pvc bal valve only because its cheaper ane weighs less, and has the same flow. :D
  • 0

User avatar
LikimysCrotchus5
Brigadier General
Brigadier General
 
Posts: 1100
Joined: Tue Sep 04, 2007 10:16 pm
Reputation: 0

Unread postAuthor: f.c » Mon Oct 15, 2007 3:51 pm

thats a nice basic combustion youve got there. :)

keep up the great work.
  • 0

User avatar
f.c
Captain
Captain
 
Posts: 340
Joined: Sun Jul 08, 2007 2:40 am
Reputation: 0

Unread postAuthor: Lentamentalisk » Mon Oct 22, 2007 9:02 pm

The one problem I have is that the sparker is in the endcap, which is not the safest of places for it, but then again putting a sparker anywhere inside the cannon is unsafe, and it is much better to drill 2 holes, bolt in some long bolts, and attach the sparker leads to those, so you dont blow your hand off.
  • 0

User avatar
Lentamentalisk
Brigadier General
Brigadier General
 
Posts: 1202
Joined: Tue Aug 07, 2007 5:27 pm
Location: Berkeley C.A.
Reputation: 0

Unread postAuthor: TwitchTheAussie » Mon Oct 22, 2007 9:07 pm

Shoulda made a handle but its all good. Nice work
  • 0

Raise your horns if you love metal.
spudgunning is like sex, once you've tasted, you can't wait til next time.
-
CpTn_lAw
User avatar
TwitchTheAussie
Brigadier General
Brigadier General
 
Posts: 980
Joined: Tue Feb 06, 2007 3:23 am
Reputation: 0

Unread postAuthor: Novacastrian » Mon Oct 22, 2007 9:13 pm

Looks great, next step- chamber fan!!
I wouldn't be worried about the sparker.
Well done and welcome.
  • 0

America, the greatest gangster of all time. With 200 million odd foot soldiers at it's whim and call.
When you fill your car with refined oil remember that it has been paid for with blood and guts, some from your own countrymen, most not.

Novacastrian
Major General
Major General
 
Posts: 1604
Joined: Sat Aug 11, 2007 6:59 pm
Reputation: 0

Unread postAuthor: Flamex » Mon Oct 29, 2007 12:05 pm

Lentamentalisk wrote:The one problem I have is that the sparker is in the endcap, which is not the safest of places for it, but then again putting a sparker anywhere inside the cannon is unsafe, and it is much better to drill 2 holes, bolt in some long bolts, and attach the sparker leads to those, so you dont blow your hand off.


The igniter should hold, as I used a high strength epoxy to secure it in place. I had a misfire with a new cannon I just built a few days ago using the same standard "igniter cap" and the cap and cannon were undamaged. The projectile didn't make it out of the barrel, and so the cooling exhaust gases contracted, sucking the projectile back into the chamber.
  • 0


Flamex
Private
Private
 
Posts: 12
Joined: Sat Oct 06, 2007 1:40 am
Location: The Union Of Socialist Canadian Republics
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: BigGrib » Mon Oct 29, 2007 11:10 pm

definatley a handle or shoulder strap would be nice. also don't like the ignitor in the endcap, but that is personal prefence.
  • 0

Yea, that's definitely going to get you at least a tazer.

<a href="http://www.youtube.com/watch?v=AkMkGOpAF4s">DONT TAZE ME BRO.. DONT TAZE ME... AHHHH</a>
facebook.com/biggrib
User avatar
BigGrib
Colonel
Colonel
 
Posts: 652
Joined: Mon Oct 01, 2007 11:43 pm
Location: TriCities, WA
Reputation: 0

Return to Combustion Cannon Database

Who is online

Registered users: Bing [Bot], Google [Bot], Google Adsense [Bot], MSNbot Media, Yahoo [Bot]

Reputation System ©'