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SpudFiles Potato Gun Commercial

Last post by quinn whitsitt
Posted in Combustion Cannons
Replies: 15
by PCGUY » Tue Oct 29, 2013 10:54 pm » in Combustion Cannons
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First post

I've been wanting to get in some spud shooting action this fall before the weather got cold. I know it's been a while since I filmed anything for...

Last post

thank you for creating this website is there anything i can do to help
15 Replies

1194629 Views

Last post by quinn whitsitt
Fri Feb 09, 2024 2:38 pm
Sketchup Model Library

Last post by mrfoo
Replies: 152
by dewey-1 » Tue Mar 24, 2009 12:12 pm
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First post

Over the last year I have made a lot of CAD drawings for
Pneumatic Launchers.

I have imported several of them into Sketchup format.
Here is the link...

Last post

Bollocks. Dewey put them out in the hope that, and I quote

some of you can make use of these!

There's absolutely nothing wrong with using them,...
152 Replies

622365 Views

Last post by mrfoo
Mon May 20, 2024 11:17 am
Solvent Welding Course Recommended For ALL

Last post by Technician1002
Replies: 46
by sgort87 » Fri Aug 04, 2006 8:18 pm
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First post

Originally posted by DR on the Spudtech forums:

IPEX Solvent Cements ONLINE Course can be found here:

It is recommended that you download and...

Last post

Your earlier post about just scoring the surface, has me wondering if that is why OATEY makes a brush tool that scores the inside of a fitting, and...
46 Replies

334655 Views

Last post by Technician1002
Thu Dec 02, 2010 5:04 pm

Topics

Chamber

Last post by saladtossser
Replies: 1
by Charlie Brown » Mon Sep 05, 2005 12:33 pm

First post

How big should the air chamber be for a 2 diamiter barrel thats 5' long with a 2 inch sprinkler valve.

Last post

i'd say twice the barrel volume, just to be sure, a bigger chamber never hurts, a shorter barrel does.

1 Replies

1645 Views

Last post by saladtossser
Mon Sep 05, 2005 1:03 pm
cannon materials

Last post by drac
Replies: 1
by b-nice » Sun Sep 04, 2005 6:30 pm

First post

is it safer to use 316 stainless steel reinforced unions?

it is for a hybrid mini and i planed to use a 1 1/4'' sch 80 one. I dont want it to blow...

Last post

For what purpose are you using them? If it's for a normal combustion, or pneumatic, or hybrid, yes, because they can hold a substantially large...

1 Replies

1761 Views

Last post by drac
Sun Sep 04, 2005 7:51 pm
CPVC Meter and Reg/Pop-Off

Last post by saladtossser
Replies: 5
by saladtossser » Sat Jul 02, 2005 7:33 pm

First post

self-explaining

Last post

this is a propane meter!! and right now, i am using a WAY simpler design that works just as well.
co2 reg my ass :P lol, that design is obsolete now...

5 Replies

3852 Views

Last post by saladtossser
Sat Sep 03, 2005 11:12 pm
hybrid mini question

Last post by boilingleadbath
Replies: 4
by b-nice » Sat Sep 03, 2005 10:13 am

First post

im building a hybrid mini that is a 1.5'' sch80 chamber 12'' long sleeved with 2'' sch80 and 2.5'' sch40. this should be safe shouldn't it for...

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Acctualy, If I remember right, DDT (detonation-deflagulation transition) occurs more often with a lean mix (not enough fule). Don't quote me there,...

4 Replies

2096 Views

Last post by boilingleadbath
Sat Sep 03, 2005 1:35 pm
sweet melissa

Last post by CS
Replies: 3
by b-nice » Sat Sep 03, 2005 10:19 am

First post

this gun is awesome. not to loud and very accurate. is now equipted with a hard pipe propane injection and a new press regulator that is 0-140...

Last post

Go back and edit your post and at the bottom there is a sumbit area or something like that. Click the browse link then find your picture on your...

3 Replies

1977 Views

Last post by CS
Sat Sep 03, 2005 1:08 pm
Sprinkler valve question

Last post by tony2405
Replies: 11
by tony2405 » Sun Aug 21, 2005 11:57 am

First post

I bought a Rain Bird 3/4 inch automatic sprinkler valve to modify it for my spud gun. I drilled through the plastic piece and fit my blow gun into it...

Last post

ok i took my old chamber off because there was a lot of air that was leaking out. I did what you said and put primer on the pipes before i glued them...

11 Replies

4451 Views

Last post by tony2405
Fri Aug 26, 2005 10:01 pm
about how fast would a mini spud gun fire

Last post by boilingleadbath
Replies: 1
by spudman » Fri Aug 26, 2005 4:07 am

First post

about how fast would a mini spud gun fire potatoes horizontal if anyone has a speed gun

by mini i mean something around 20cm a meter long somthing...

Last post

It would depend appon fuel, projectile mass, and barrel diameter.
With a good propane fuel-air mixture, and a projectile mass of 20 grams in a 2.5 cm...

1 Replies

2190 Views

Last post by boilingleadbath
Fri Aug 26, 2005 10:46 am
How To Seal Leaks

Last post by boilingleadbath
Replies: 2
by Vincente » Thu Aug 25, 2005 11:40 am

First post

Hey everyone,

I just built a pneumatic cannon which is fired using a ball valve. I am currently only shooting water from the cannon because I'm not...

Last post

Darkerweb12, it's leaking solvent welds that are bad. Leaking threaded joints are... normal.

There are several meathods;
If you can live with some...

2 Replies

1795 Views

Last post by boilingleadbath
Thu Aug 25, 2005 2:06 pm
i found this valve

Last post by spudshot
Replies: 1
by Charlie Brown » Wed Aug 24, 2005 4:37 pm

First post

could you please give me some info on it. has a inlet 3/4 inch and 3/4 out let and a egsaust thats a bout one inch and a small opening in the top...

Last post

you need to upload a pic before we could see it, from what i understand it sounds like a QEV

1 Replies

3225 Views

Last post by spudshot
Wed Aug 24, 2005 6:22 pm
Simple Combustion Cannon

Last post by townbomber_01
Replies: 3
by Hal0 x » Tue Aug 23, 2005 2:11 pm

First post

Like the Title Says Simple Combustion Cannon...Good first Timer

Parts

# 2 feet of 2 inch dia. PVC or ABS pressure rated pipe
# 1 foot of 3 inch...

Last post

3 ft barrel...better results

3 Replies

5349 Views

Last post by townbomber_01
Wed Aug 24, 2005 1:23 am
Air nossel question

Last post by spudshot
Replies: 1
by tony2405 » Sun Aug 21, 2005 12:01 pm

First post

I am building a spud gun that uses the sprinkler valve witha blow gun. It has an air pressure gauge on the chamber but i cant seem to find a air...

Last post

a schrader valve is what you want

1 Replies

1425 Views

Last post by spudshot
Sun Aug 21, 2005 12:18 pm
IPLA

Last post by CS
Replies: 2
by Charlie Brown » Sat Aug 20, 2005 9:45 pm

First post

Can some people give me IPLA logos, just post them in this forum.

P.S. sorry if I posted this in the wrong section I did't know where else to go

Last post

International Potato Launching Association. They have there own section on spudtech here

2 Replies

2352 Views

Last post by CS
Sat Aug 20, 2005 10:55 pm
Fastest speed, longest distance etc?

Last post by spudshot
Replies: 1
by julz » Sat Aug 20, 2005 7:33 am

First post

Hi, i was just wondering what was the highest speed reached and the longest distance shot etc with your cannon?

for me, with a dodgey calculation...

Last post

well, i dont have a chrony, but with my copy of the HVPL-01 in GGDT it predicts i'll be getting in the 800-1000 range depending on barrel length and...

1 Replies

1794 Views

Last post by spudshot
Sat Aug 20, 2005 7:40 am
help

Last post by Charlie Brown
Replies: 3
by Charlie Brown » Fri Aug 19, 2005 4:10 pm

First post

im going to down load a 3d model ing thing from rinocerous wich ones should i get to disien potato guns; Industrial Design
Rapid Prototyping...

Last post

no spud shot i was just in a rush

3 Replies

2098 Views

Last post by Charlie Brown
Fri Aug 19, 2005 10:02 pm
need help

Last post by PCGUY
Replies: 1
by Mad-Add » Fri Aug 19, 2005 1:38 pm

First post

Hi GUYS can some one please help me!!! were do you buy a BBQ lighter? in the US i live in sweden :wink:

Last post

Wherever you can buy BBQ grills, you can probally also pick up or order an ignitor.

If worse comes to worse you could order one online and pay the...

1 Replies

2018 Views

Last post by PCGUY
Fri Aug 19, 2005 3:28 pm
multible vaves

Last post by Charlie Brown
Replies: 2
by Charlie Brown » Thu Aug 18, 2005 8:28 pm

First post

If you read about my cannon that im going to build i have changed the plans and updated what do you think of my cannon . (the updates can be viewed...

Last post

thanks spud shot. your so helpful :wink:

2 Replies

1606 Views

Last post by Charlie Brown
Thu Aug 18, 2005 8:58 pm
blow torch

Last post by pvt joker
Replies: 2
by pvt joker » Tue Aug 16, 2005 4:51 am

First post

hey guys

now i know this is a bit of topic. but i was at the hard were store the other day and bought a blow torch in the hope of doing a little...

Last post

hey

thanks spud shot

so it will be fine for building a copper cannon then? great.
cus i have a mate who got a bb gun for his b day and hes putting...

2 Replies

2715 Views

Last post by pvt joker
Tue Aug 16, 2005 3:40 pm
will this valve work

Last post by spudshot
Replies: 1
by Charlie Brown » Tue Aug 16, 2005 1:44 pm

First post

i bought this valve but i heard that it opens to slow is this true

Last post

no, it should be fine, i've seen other people use those valves.

dont double post, edit your posts, i deleted your other one, and fixed your pic, you...

1 Replies

1511 Views

Last post by spudshot
Tue Aug 16, 2005 1:51 pm
Where do I find the GGDT?

Last post by PCGUY
Replies: 1
by Fight The Machine » Fri Aug 12, 2005 6:02 pm

I've heard a lot about the GGDT (gas gun design tool), but where can I find it yo use it?

1 Replies

1839 Views

Last post by PCGUY
Fri Aug 12, 2005 6:05 pm
Ratios!

Last post by neilman88
Replies: 3
by neilman88 » Sun Aug 07, 2005 6:40 am

First post

hey is there like a thing i can download to figure out ratio...because i have no clue how to do it, if someone said hey is your rario good then i...

Last post

ok many many thx

3 Replies

2286 Views

Last post by neilman88
Tue Aug 09, 2005 5:49 am
pnumatic piston

Last post by Spencer
Replies: 6
by sergeantspud2 » Wed Aug 03, 2005 10:10 pm

First post

could someone explain to me how a piston works.

Last post

Go here for a visual explanation if you are registered for spud tech forums:
Pretty hard not to understand watching that.

6 Replies

3528 Views

Last post by Spencer
Mon Aug 08, 2005 12:52 pm
barrel to chamber size ratio on pneumatics

Last post by saladtossser
Replies: 3
by Jimpson » Sat Aug 06, 2005 2:27 pm

First post

Does anyone know a good C:B size ratio for pneumatics? I have a copper gun with a 3ft barrel, and about 2.5ft of 3/4 chamber. THe barrel is 1/2. I...

Last post

depends on your operating pressure

3 Replies

3316 Views

Last post by saladtossser
Sat Aug 06, 2005 8:47 pm
Fuel mixer

Last post by saladtossser
Replies: 6
by saladtossser » Fri Aug 05, 2005 4:58 pm

First post

has this been done before?

the mixer is a 1.5 pipe with fan blade like tin sheets cut from a can. it is designed to trave up and down a 2 chamber...

Last post

my gun is of an over-under design, so the mixer will be on the other end of the chamber when it fires

6 Replies

2828 Views

Last post by saladtossser
Fri Aug 05, 2005 7:51 pm
spud n00b!

Last post by yuandrew
Replies: 29
by Anubis013 » Tue Mar 29, 2005 10:16 pm
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listen, i m beginning to think about about building a spudgun but first im mentaly think how im going to do it. although i don't know how to install...

Last post

If you take the lighter apart, you should see a little square thing with some wires comming out of it going into the nozzel/burner. There's a plastic...
29 Replies

14163 Views

Last post by yuandrew
Thu Aug 04, 2005 12:09 pm
MAP Gas

Last post by boilingleadbath
Replies: 6
by UnrealityisReal » Thu Feb 10, 2005 10:52 am

First post

I have a combustion cannon that uses propane and i was interested in upgrading to MAP Gas. Does anyone have any information regarding the safety of...

Last post

The aerodynamic forces are smaller than the forces inside a launcher... that potatoe was damaged in the barrel, not the air.

It does result in...

6 Replies

3641 Views

Last post by boilingleadbath
Wed Aug 03, 2005 2:58 pm

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