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

976818 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

651925 Views

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

Topics

Hi. wondering if this design would work. Little hybrid

Last post by MrCrowley
Replies: 60
by Rob748 » Wed Feb 18, 2009 9:55 pm
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Ok I wanted to make a smaller hybrid out of schedule 40 piping. The combustion chamber is roughly 10 by 3 inches long and the barrel is about 26 by...

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Rob, your drawing seems to be good enough aside from two things:

1: The burst disk. You still don't (or didn't at the time of the drawing) have any...
60 Replies

15817 Views

Last post by MrCrowley
Fri Feb 20, 2009 6:31 pm
New burst disk idea ?

Last post by Combustion Monkey
Replies: 29
by trigun » Mon Feb 09, 2009 10:42 pm
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I was at home depot the other day and saw they sold pvc sheet. It is fairly thin so it seems like a good burst disk. Has anyone else ever tried to...

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It is amazing how difficult it is to find decent burst disk material. Many people have gone down this road and always seem to drift back toward...
29 Replies

6487 Views

Last post by Combustion Monkey
Mon Feb 16, 2009 6:58 pm
FEAR

Last post by Killjoy
Replies: 89
by Killjoy » Wed Apr 25, 2007 1:29 am
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FEAR

Combustion Chamber
6 diameter sch 40 steel pipe, 63 long. Recommended working pressure 1100, burst pressure 3200 psi. Total volume...

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In theory I could but I feel it could get to complicated if I tried to do that with timing and all.
The active recoil system sounds like a possible...
89 Replies

47403 Views

Last post by Killjoy
Sun Feb 08, 2009 8:08 pm
New hybrid, 4x mix.

Last post by psycix
Replies: 7
by Willdebeers » Tue Feb 03, 2009 1:58 pm

First post

...

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it will run 4x, but if im brave i'll try 5-6x
What you may consider brave is actually ignoring danger because of being stupid
Now being brave may...

7 Replies

2410 Views

Last post by psycix
Tue Feb 03, 2009 4:26 pm
Sch. 40 pipe

Last post by trigun
Replies: 1
by trigun » Sun Feb 01, 2009 2:57 am

First post

I'm planning on building a hybrid duh. I can't seem to find anywhere what the actual pressure rating of sch. 40 steel pipe is. Does any one know ?

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Wow i found it. I looked all over the forum and google then just looked on spudwiki. Its safe to 11x and 2000psi wow.

I request this one be closed...

1 Replies

1887 Views

Last post by trigun
Sun Feb 01, 2009 3:01 am
hybrid setup

Last post by trigun
Replies: 7
by trigun » Wed Jan 28, 2009 12:00 am

First post

I want to take a 3 steel pipe plenty thick weld two square plates on the end then put a 1 union for the barrel. On the back i was thinking a 1/2 inch...

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yes it will be in the showcase. It will look a bit different than the sb15? i think it is. But I'm planning on making it hand held and only reason it...

7 Replies

2714 Views

Last post by trigun
Thu Jan 29, 2009 4:33 pm
Getting a little nervous...

Last post by psycix
Replies: 34
by Moonbogg » Fri Jan 16, 2009 4:28 am
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OK, so the aluminum for my new cannon showed up today at my doorstep, and then the reality of the project hit me...I am going to be holding a large...

Last post

Frankrede, there is a line between being courageous and being stupid, and you crossed it...

;) :D
Though really, you should know better.
Or were...
34 Replies

8967 Views

Last post by psycix
Mon Jan 19, 2009 6:52 am
my first hybrid

Last post by psycix
Replies: 37
by maggotman » Sat Jan 17, 2009 1:56 pm
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well ive just wacked together a hybrid of sorts and ive tried using it but i cant get it to fire i think its a metering problem or the spark not in...

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3 mm gap?
3x9 = 27 mm
Thats over an inch. Can your spark jump that on atmospheric pressure?
You certainly need to close the gap to less then one mm....
37 Replies

9890 Views

Last post by psycix
Mon Jan 19, 2009 6:14 am
1/4 ballvalve max. pressure?

Last post by Biopyro
Replies: 9
by Gunner » Sat Jan 17, 2009 2:33 pm

First post

What do you think that if I make 30x mixture and Ill use that valve so does it handle it?

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Yes it is maggotman. Sorry gunner, I just flicked over and thought ALIHISGREAT was the original poster

9 Replies

2995 Views

Last post by Biopyro
Sat Jan 17, 2009 5:43 pm
Blowback spring

Last post by daccel
Replies: 3
by daccel » Tue Jan 13, 2009 12:58 am

First post

What would be the best spring for a direct blow back hybrid cartridge? A regular steel spring or an air spring?

I could make the steel spring...

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Yeah the air would allow more flexibility for layout. More important when moving beyond a proof of concept, but might as well start designing that in...

3 Replies

1956 Views

Last post by daccel
Wed Jan 14, 2009 2:16 am
SCH40 PVC

Last post by psycix
Replies: 6
by Moonbogg » Mon Jan 12, 2009 4:21 pm

First post

I was reading about pvc burst pressure requirements and 4 sch40 has a min. burst pressure requirement of 710PSI. Why don't people use it for 2-3x...

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With that mindset, all pvc cannons will eventually fail.
When subjected to shock loads, yes.
But on simple combustions the shock load is so low that...

6 Replies

2340 Views

Last post by psycix
Tue Jan 13, 2009 1:59 pm
Mini Hybrid Chamber Type M Copper

Last post by daccel
Replies: 3
by spudkilla224 » Mon Jan 12, 2009 6:42 pm

First post

Hello i am doing research on hybrid cannons and i was using HGDT and i'm using a 3/4 Type M Copper Chamber as my combustion chamer, it says that it...

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As I was referred, so I shall refer: Copper tube handbook .

I've used 3/4 L at 8.5x without a problem, but make sure you check out the specific...

3 Replies

1738 Views

Last post by daccel
Mon Jan 12, 2009 8:22 pm
Combustion/burst valve/piston hybrid?

Last post by starman
Replies: 14
by Daltonultra » Sat Nov 29, 2008 9:49 pm

First post

I've been tossing this one around in my head for a couple days. I don't have the resources to do it myself, so I'll throw it out for anyone who...

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The wrapped up wire is for 9-12V - underneath the tape is a flyback transformer circuit, you can see the HV wire going of to the right. The long wire...

14 Replies

5934 Views

Last post by starman
Sun Jan 11, 2009 1:50 pm
hybrid chamber?

Last post by SpudFarm
Replies: 10
by Jspellman » Wed Jan 07, 2009 3:06 am

First post

I got ahold of two of these these and was wondering if i could maybe use them for chambers on a hybrid? the pressure rating is like 150 or 200 but...

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i have used a 5,5 chamber on 11x with 7mm walls. no sign of stress. in my opinion hybrids is a little over estimated. they are not as brutal as...

10 Replies

3044 Views

Last post by SpudFarm
Thu Jan 08, 2009 10:12 am
Meter for 30ml chamber

Last post by VH_man
Replies: 30
by Sticky_Tape » Fri Jan 02, 2009 11:57 am
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What is the best way to meter propane for a 30ml chamber? I am thinking a syringe but other than a syringe.

Last post

do the chemistry. Figure out the wattage of the propane energy released

do the math for tensile strength and burst pressures.

basically, prove it...
30 Replies

6710 Views

Last post by VH_man
Tue Jan 06, 2009 7:00 am
General questions

Last post by MrCrowley
Replies: 1
by Moonbogg » Tue Jan 06, 2009 3:13 am

First post

I just have a few general questions about hybrids.
How common are handheld hybrids and if hand held are they usually much smaller than a typical...

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How common are handheld hybrids and if hand held are they usually much smaller than a typical combustion or pneumatic
Because hybrids need to...

1 Replies

1888 Views

Last post by MrCrowley
Tue Jan 06, 2009 4:27 am
Piston cartridge

Last post by daccel
Replies: 7
by daccel » Mon Jan 05, 2009 2:07 am

First post

Thinking about making a piston cartridge, but at smaller sizes the coaxial layout doesn't end up leaving much chamber volume, so I came up with this....

Last post

Well the piston front could act as a check valve to fuel through, then orings on the piston to seal it from air behind.

Hate to let go of an idea,...

7 Replies

2481 Views

Last post by daccel
Tue Jan 06, 2009 12:30 am
Is it possible?

Last post by Ragnarok
Replies: 5
by taterflames22 » Mon Jan 05, 2009 12:21 pm

First post

My question is: Is it possible to convert a combustion cannon to a hybrid?

Last post

That really depends. Personally, I wouldn't be too concerned using something that was designed, and (well) made as a combustion at a 2x mix, assuming...

5 Replies

1953 Views

Last post by Ragnarok
Mon Jan 05, 2009 7:29 pm
Hybrid fueling question

Last post by CasinoVanart
Replies: 2
by Moonbogg » Mon Jan 05, 2009 5:10 pm

First post

I am designing a new hybrid and I want to keep it really clean and as light as possible, so I will be using separate meter pipes and won't have a...

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I have used schraders on Hybrids up to 9x . They do break off easily if bumped though.

2 Replies

1657 Views

Last post by CasinoVanart
Mon Jan 05, 2009 6:50 pm
Compressed air spark gaps

Last post by jimmy101
Replies: 6
by Moonbogg » Sat Jan 03, 2009 5:23 pm

First post

In a 3xi chamber, would the spark gaps have to be closer than at atmosphere? Is there additional resistance due to the thicker air? Can it be figured...

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t...will the sparks still be as effective if they are super tiny? As long as there are 3 of them, I would think it would be good still.
A spark is a...

6 Replies

2677 Views

Last post by jimmy101
Mon Jan 05, 2009 5:41 pm
sealing a burst disk in a tube

Last post by JDP12
Replies: 8
by JDP12 » Mon Jan 05, 2009 10:08 am

First post

Hey all- It looks like a few other people are working on the same project I am- a cartridge hybrid gun. I saw JSR's design, but i want something that...

Last post

I figured something out- its a combination of two designs- I will post a diagram later

8 Replies

2434 Views

Last post by JDP12
Mon Jan 05, 2009 4:26 pm
"Boston Industrial Tools" air regulators are cheap

Last post by PCGUY
Replies: 15
by noob of noobs » Wed Dec 24, 2008 12:35 pm
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Hello! So I'm looking to build a propane/air meter for an upcoming hybrid cannon. It's going to require two regulators (one for air, one for propane)...

Last post

Links fixed. 8)
15 Replies

5644 Views

Last post by PCGUY
Tue Dec 30, 2008 12:51 am
Spherical Hybrid Combustion Chamber?

Last post by JohnnyBOOM
Replies: 19
by JohnnyBOOM » Tue Dec 23, 2008 2:05 pm
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I've read in several posts that the optimal shape to prevent detonation would be a sphere. So that got me to thinking, if you had access to a CNC...

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Actually, I was making a remark in reference to D_Hall's comment on recreating the diesel engine. Perhaps I should make use of the quote...
19 Replies

5542 Views

Last post by JohnnyBOOM
Mon Dec 29, 2008 5:36 pm
Spare Tank

Last post by ramses
Replies: 15
by JohnnyBOOM » Wed Dec 24, 2008 3:13 am
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An 8 long by 4.5 diameter oxygen cylinder tested at 3500psi might make a mean hybrid? There's even a nifty high pressure Schrader valve in it.

This...

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you could weld (or pay someone to weld) some threaded aluminum pipe to it.
15 Replies

5921 Views

Last post by ramses
Mon Dec 29, 2008 1:58 pm
Hybrid Piston Valve Design

Last post by ramses
Replies: 14
by noob of noobs » Sat Dec 20, 2008 2:21 am

First post

Hello friends! It’s winter break for me, and so I’ve decided to make a new cannon; a hybrid piston-valve cannon. This is mostly an experimental...

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i still say that it will come to a relatively slow stop if you use an air spring and extremely little dead volume. this also lets you choose your...

14 Replies

5594 Views

Last post by ramses
Mon Dec 22, 2008 9:18 am

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