Hybrid Cannons

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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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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...

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

1569666 Views

Last post by quinn whitsitt
Fri Feb 09, 2024 2:38 pm
HYBRID FUELING 101

Last post by quinn whitsitt
Replies: 106
by SpudBlaster15 » Mon Mar 17, 2008 10:56 pm
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Part 1: Using traditional hybrid fuel meters correctly

Question: How many of those who have constructed hybrid launchers have used either an online...

Last post

thank you this is so helpfull!!
106 Replies

881924 Views

Last post by quinn whitsitt
Fri Mar 01, 2024 10:50 am

Topics

HGDT calculator

Last post by jumoo
Replies: 2
by nitrogigi » Wed Apr 21, 2021 7:09 am

First post

Hi guys!
does anybody still have a valid link to HGDT calculator? or could put it back online?
Many thanks in advance!
I'm currently building an...

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It's nice to see someone else who remembers Patatorforum. I used HGDT years ago as well, but most of the old download links seem to have disappeared....

2 Replies

8865 Views

Last post by jumoo
Tue Jul 28, 2026 8:46 am
Speed limit?

Last post by btrettel
Replies: 3
by yyt » Sun Jul 19, 2026 9:34 pm

First post

Can a propane-air mixture allow projectiles to exceed the internal speed-of-sound limit associated with their combustion?

The following content is...

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This question is answered by John Corner's 1950 book Theory of the Interior Ballistics of Guns in section 9.16 titled The maximum possible muzzle...

3 Replies

307 Views

Last post by btrettel
Mon Jul 20, 2026 7:37 am
Workin' on a coaxial sleeper build

Last post by Moonbogg
Replies: 5
by Moonbogg » Mon Apr 20, 2026 2:32 pm

First post

Looks like an average cannon until you see the inside. I used the chamber volume efficiently for valve design to maximize flow with no restriction; 1...

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I'm trying to simplify this thing as much as possible; less parts, less machining, less weight, less cost, while having the chamber volume I want. I...

5 Replies

231073 Views

Last post by Moonbogg
Fri Apr 24, 2026 5:07 pm
Hybrid disk burst pressure effect on performance

Last post by Lumines
Replies: 26
by jackssmirkingrevenge » Sat Nov 11, 2023 12:53 am
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One of the experiments I've done with this project to to see how burst disk strength influences performance. Intuitively one would tend to think that...

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This is very interesting. Intuitively, the highest pressure accumulated before burst would live result in the highest velocity.

It would stand to...
26 Replies

772026 Views

Last post by Lumines
Sat Mar 21, 2026 4:42 am
How to achieve ultra-high power: piston-supercharged propane gun?

Last post by D_Hall
Replies: 5
by yyt » Thu May 22, 2025 3:16 am

First post

This method will challenge the liquefaction limit of propane, exceeding the compression of 20 MPa, and may even reach the energy density of...

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Buy a certified commercial product. If you need high energy for legitimate sport or research, use commercially manufactured devices that meet safety...

5 Replies

96149 Views

Last post by D_Hall
Mon Sep 22, 2025 8:56 am
Big Assed Mother Farker

Last post by Moonbogg
Replies: 17
by striker » Sun Feb 03, 2013 2:30 am
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as you would have probably seen in the hybrid build section that I've had this build on the cards for a few years. well I got around to making it a...

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Yes, perfect! I love stuff like this. What a great update. Thanks for sharing!
17 Replies

258144 Views

Last post by Moonbogg
Fri Jun 13, 2025 12:50 am
overly large Hybrid?

Last post by striker
Replies: 58
by striker » Sat Jan 24, 2009 12:12 am
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Hi guys and girls

This is my first post on here so please be nice.lol

Anyhow I have been contemplating a hybrid build for some time and for the...

Last post

upgrades in motion
58 Replies

305929 Views

Last post by striker
Wed May 21, 2025 2:07 am
Single pumping hybrid, "Strong Boy"

Last post by Daisy L
Replies: 66
by hectmarr » Mon Nov 25, 2019 6:19 pm
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I am planning to build a low compression hybrid, about 3 or 4X, which uses manual force, :roll: using the bolt to compress the mixture. I have...

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Great discussion so far! Based on my experience building pneumatic launchers, I’d recommend upgrading to a 1-inch sprinkler valve for better airflow...
66 Replies

1951168 Views

Last post by Daisy L
Tue Apr 22, 2025 3:09 am
Successfully penetrated 10mm steel plate！

Last post by drainedict
Replies: 5
by yyt » Fri Feb 09, 2024 1:12 am

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Combustion chamber volume: 100cc Barrel diameter: 15mm Barrel length: 100cm Fuel: Liquefied petroleum gas Combustion aid: air with 40% oxygen content...

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That it was able to answer that question is a work of art, but did you use real patatos or hollow core or solid core projectiles? If it was solid or...

5 Replies

118423 Views

Last post by drainedict
Tue Apr 15, 2025 10:17 pm
75SD 3/4" hybrid with integral suppressor

Last post by jackssmirkingrevenge
Replies: 63
by jackssmirkingrevenge » Thu Dec 02, 2010 9:24 am
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As this has gone beyond a mini, I figured it was worth a new thread.

This is the biggest hybrid I've made to date, nothing particular about the...

Last post

Reuploaded a compilation of test clips from this project:
63 Replies

371214 Views

Last post by jackssmirkingrevenge
Sun Mar 30, 2025 7:26 am
Mon blue king cal 68

Last post by Turbine32
Replies: 17
by Turbine32 » Wed Nov 13, 2024 5:33 pm
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Salut à tous je suis français et je vous présente mon fusil hybride blue king✌️
Très peu de français se lancent dans de tel projet j'ai...

Last post

Since we're talking about rifling, have you seen how people are using electrochemical machining to rifle barrels from steel tubing?

A very...
17 Replies

240469 Views

Last post by Turbine32
Thu Jan 02, 2025 9:22 pm
High mixture hybrid gun "fuel cartridges" proposal

Last post by YBCO666

by YBCO666 » Mon Oct 21, 2024 1:05 am

Well, I don't have the money, or the equipment, or the room to make a hybrid gun (100x+ mixture), the best I could do is make the 3D plans and see if...

0 Replies

361035 Views

Last post by YBCO666
Mon Oct 21, 2024 1:05 am
GAW 770 by Grégory

Last post by Turbine32

by Turbine32 » Wed Sep 11, 2024 3:30 am

Bonjour à tous je suis français et en France pas beaucoup de monde ose les choses... Mais moi je le fais !
Pour continuer à faire vivre nôtre plaisir...

0 Replies

358476 Views

Last post by Turbine32
Wed Sep 11, 2024 3:30 am
I asked A.I. to make a heavy metal song about my spud cannon

Last post by elenagilbert
Replies: 3
by Moonbogg » Tue Jun 18, 2024 5:22 am

First post

The link to the song is below, but I also attached the MP3 to this post. Lyrics are copied below. This song rocks!!

Song Title: Blast of Glory!...

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This song is a metal masterpiece. The imagery of spuds flying through the sky combined with the roaring chorus makes this track incredibly dynamic....

3 Replies

98695 Views

Last post by elenagilbert
Mon Aug 19, 2024 9:15 pm
Gregazzgun 770

Last post by Turbine32

by Turbine32 » Mon Aug 05, 2024 12:03 pm

Bonjour à tous je crée ce poste (je suis français) pour participer à continuer de donner vie au forum...
J'ai toujours aimé construire des choses...

0 Replies

351843 Views

Last post by Turbine32
Mon Aug 05, 2024 12:03 pm
Hybrid velocity

Last post by quinn whitsitt
Replies: 20
by Pennywise » Mon Mar 18, 2024 7:07 pm
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I have measured upwards of 3355 feet per second with a hybrid I've been working on. Mind you, I'm using a .510 diameter 3d printed 100% infill...

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once I get my own PC I will since I am running on school chromebook
20 Replies

209735 Views

Last post by quinn whitsitt
Wed Apr 10, 2024 8:07 am
UPGBH10x

Last post by Gippeto
Replies: 89
by SpudFarm » Mon Aug 03, 2009 2:51 pm
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This is a cannon that was made a long time ago. It was supposed to have a smaller chamber but I decided that if it is worth doing it's worth over...

Last post

X2

Almost 200 posts and not a single useful one that I've seen.

Maybe I'm just gettin old and cranky at this point lol.

Your continuous and...
89 Replies

562349 Views

Last post by Gippeto
Sat Mar 09, 2024 7:43 pm
Long range accuracy

Last post by quinn whitsitt
Replies: 7
by jstntmcdrmtt » Tue Jan 14, 2014 6:52 pm

First post

Hello, folks. I'm new to the forum, and am currently in the seriously considering phase of building my first hybrid. Now, I've spent the last few...

Last post

or a dart projectile

7 Replies

113664 Views

Last post by quinn whitsitt
Wed Mar 06, 2024 12:00 pm
The needle valve actually failed at 150×

Last post by quinn whitsitt
Replies: 5
by yyt » Sat Jan 21, 2023 10:46 am

First post

I can't understand that the initial pressure of 150× and the theoretical explosion limit pressure should be less than 110mpa, but the maximum working...

Last post

that not very high psi.

5 Replies

126401 Views

Last post by quinn whitsitt
Fri Mar 01, 2024 10:51 am
Hybrid handgun with rupture disc

Last post by quinn whitsitt
Replies: 8
by hectmarr » Mon Jan 15, 2024 4:06 pm

First post

I had this project in mind for quite some time, and I have finally finished it.
This is this .22 caliber pistol that fires common pellets, associated...

Last post

nice job
and i hope you all have a great day a great week and a great year!!!!

8 Replies

233497 Views

Last post by quinn whitsitt
Tue Feb 20, 2024 11:04 am
hybrid flack cannon

Last post by quinn whitsitt

by quinn whitsitt » Thu Feb 15, 2024 3:06 pm

do you have any suggestion for the stand for the flack cannon i am done with the the firing part
thank you all for mainting this forums your great!

0 Replies

82790 Views

Last post by quinn whitsitt
Thu Feb 15, 2024 3:06 pm
do any of you guys have some tips for hybrids

Last post by quinn whitsitt
Replies: 3
by quinn whitsitt » Thu Feb 15, 2024 12:06 pm

First post

this is a suggestion subject so if you know anything please respond

Last post

i just want the community to be happy do you know of any ways that i can help out the community

3 Replies

82983 Views

Last post by quinn whitsitt
Thu Feb 15, 2024 1:41 pm
what whould be some great feuls for hybrid cannons

Last post by quinn whitsitt

by quinn whitsitt » Wed Feb 14, 2024 10:44 am

hello everyone i have found out that desiel feul supplement works great in combustion guns whould it also improve the preformence of a hybrid cannon

0 Replies

79868 Views

Last post by quinn whitsitt
Wed Feb 14, 2024 10:44 am
hybrid cannons

Last post by quinn whitsitt

by quinn whitsitt » Tue Feb 13, 2024 11:54 am

i have never built a hybrid any advice

0 Replies

80264 Views

Last post by quinn whitsitt
Tue Feb 13, 2024 11:54 am
Will it still work when the fuel starts to liquefy?

Last post by yyt

by yyt » Tue Feb 06, 2024 8:53 pm

I couldn't get propane and had to use butane instead, but butane seems to have a much lower liquefaction pressure than propane, when I add pressure...

0 Replies

80969 Views

Last post by yyt
Tue Feb 06, 2024 8:53 pm

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