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...

Last post

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

1440714 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

843448 Views

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

Topics

cup shaped bursk disk

Last post by mobile chernobyl
Replies: 12
by jean » Sat Jan 19, 2013 10:26 am

First post

ok im thinking
of a cup shaped burst disk machined out of delrin or something
or made by deep drawing with vacuum out of some sort thermoplastic...

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Cartridges?

Silly cartridges... they certainly don't utilize the biggest advantage of a combustion gas gun - gaseous propellant! :D

12 Replies

7290 Views

Last post by mobile chernobyl
Mon Mar 04, 2013 7:13 pm
Fueling multiple chambers without need for valve on each one

Last post by jackssmirkingrevenge
Replies: 10
by CS » Mon Feb 18, 2013 6:20 pm

First post

I'm working on a belt fed hybrid, and up to now I planned a spool valve on each cartridge to fill them. That is a lot of work/o-rings/fittings/cost...

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As with most valves of this type, you need a raised lip for it to work effectively:

10 Replies

5985 Views

Last post by jackssmirkingrevenge
Wed Feb 20, 2013 8:19 am
Fueling problems (manometer)

Last post by jackssmirkingrevenge
Replies: 25
by CS » Wed Jan 23, 2013 9:02 am
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So I fill the manometer to a water column difference of 14.8 (adjusted for elevation). Close the ball valve to the meter, click the sparker, and...

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I hadm issed this working, good job :)
25 Replies

10525 Views

Last post by jackssmirkingrevenge
Tue Feb 19, 2013 4:29 am
My hybrid (piston version)

Last post by wyz2285
Replies: 8
by wyz2285 » Fri Feb 15, 2013 1:46 pm

First post

Well, I really really wanted a Flak 88 gun :lol:
I found my self the stuffs I thing I'd need, like pneumatic cylinders etc.
Most importantly, I want...

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Well, I really really wanted a Flak 88 gun :lol

Sooo... is it going to be put of a cruciform mount and have a recoiling system and everything?...

8 Replies

4463 Views

Last post by wyz2285
Mon Feb 18, 2013 4:35 am
Flint ignition

Last post by Happy
Replies: 25
by POLAND_SPUD » Fri Jan 14, 2011 6:26 am
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so what do you think, is it a good idea to use flint igniters for hybrids?
Any ideas how to build a flint ignition system for hybrids?

Last post

Thx and im sorry for posting pointless questions, I now understand Hybrids better. It seems it would extremely complicate the system i have in mind...
25 Replies

11258 Views

Last post by Happy
Fri Feb 15, 2013 9:25 pm
My Hybrid Build (buidlog)

Last post by airpress
Replies: 2
by airpress » Sat Feb 02, 2013 9:51 am

First post

Hello.

I decided to start a new hybrid project.
I will start from the beginning with a new cannon, i keep the pmhl not in mind. Extually it works...

Last post

Thanks for the tips, I appreciate it!

I've got some 2 to 5/4 reducers here laying around.
I understand your thing for larger unions.
I will go for...

2 Replies

3194 Views

Last post by airpress
Sun Feb 03, 2013 8:19 am
PMHL by Airpress (Pressure Metered Hybrid Launcher)

Last post by mobile chernobyl
Replies: 38
by airpress » Sat Jun 02, 2012 2:29 pm
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Hi folks.

I started a week ago with building a simple hybrid.
It was that type of launcher i never builded since 8 years. So I thought it was time....

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What ignition source do you think you will end up using?
38 Replies

17835 Views

Last post by mobile chernobyl
Sat Feb 02, 2013 1:52 pm
6mm mini hybrid

Last post by wyz2285
Replies: 15
by wyz2285 » Sun Jan 20, 2013 12:04 pm
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I made this thing really quick, welding brass and copper it's way faster than epoxy :lol:. took me like 2 hours to fix a leak on the spark thread...

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Damn fuel this is hard like hell :? Don't know where I left my small syringes, fuel with my 100ml syringe is just not precise enough for something...
15 Replies

8748 Views

Last post by wyz2285
Thu Jan 24, 2013 1:22 pm
How fast does your burst disc leak?

Last post by CS
Replies: 13
by CS » Tue Jan 08, 2013 6:47 am

First post

At 30 psi I lose 3-5 psi in one minute. I'm wondering if you all are having better luck then me? Tommorow I'm going to try and use a gasket insted of...

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Well I cut a rubber sheet out like this:
It is only leaking 1 psi every 5 minutes at 30 psi. Yeah!

HOLY F*ING SH*T
(russian zorbing)

13 Replies

6488 Views

Last post by CS
Thu Jan 10, 2013 2:39 am
2" Golfball Hybrid Buildlog

Last post by Lockednloaded
Replies: 10
by Lockednloaded » Fri Jan 04, 2013 6:06 pm

First post

I recently started working on a full sized metal golfball hybrid, and so far I have the meter, chamber, burst disk, and sparkplug all setup. At the...

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I understand the concern with the digital gauge, and even though its currently protected by 2 ball valves, I'll air on the safer side and mount it on...

10 Replies

6958 Views

Last post by Lockednloaded
Sun Jan 06, 2013 7:47 pm
Cartridge hybrid build log

Last post by jackssmirkingrevenge
Replies: 22
by Skywalker » Thu Dec 23, 2010 3:23 pm
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Well, JSR et al have been bemoaning the lack of innovation on the spud forums; I've been itching to build something, and now that I'm on winter...

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If I remember well I couldn't penetrate PC hardware steel with my mini hybrid below 10x.

Above that though, no problem with lead pellets:

At 14x...
22 Replies

17839 Views

Last post by jackssmirkingrevenge
Thu Jan 03, 2013 11:38 am
Compression Autoignition Solid Fuel Hybrid?

Last post by Zeus
Replies: 3
by auxiliary » Tue Jan 01, 2013 6:18 pm

First post

Iv'e got an idea here and wondered if this is at all feasible. The main idea is to compress air and solid powdered fuel like flour with enough...

Last post

You could use something like diesel, which easily ignites with rapid pressure, but we're not allowed to talk about it on these forums.

Unless...

3 Replies

4097 Views

Last post by Zeus
Tue Jan 01, 2013 7:50 pm
Fueling app for android

Last post by dewey-1
Replies: 12
by POLAND_SPUD » Mon Nov 26, 2012 5:36 pm

First post

So here is my revised fueling calculator for hybrids.

Seems to work just fine for me - tested at 1X on various chambers of different sizes and it...

Last post

I think you should add a safety interlock switch in series with your switched ignition power also.

12 Replies

8366 Views

Last post by dewey-1
Tue Dec 18, 2012 3:52 pm
Semi Auto Cartridge Hybrid Build Log (Lotsa pics)

Last post by CpTn_lAw
Replies: 30
by pneumaticcannons » Thu Aug 09, 2012 5:21 am
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I'm in serious need of a new username :D

After pondering countless cartridge hybrid designs, I've decided to screw simplicity and see just how...

Last post

Haha :D

Nice job here.
However, if I may...do some positive criticism :D

It's ingenious. But it could be more. ==> It seems like it has too many...
30 Replies

31154 Views

Last post by CpTn_lAw
Fri Dec 14, 2012 3:08 pm
U Tube Manometer

Last post by POLAND_SPUD
Replies: 8
by CS » Fri Nov 30, 2012 6:25 pm

First post

Needle Valve plus Pressure Gauge

Bernzomatic Torch
Another type of fuel meter is simply a needle valve and a low range pressure gauge. The needle...

Last post

uhmm dude I know that - the reason I posted it here is not because I found something about 'mms of water' somewhere in the text but because he is...

8 Replies

8446 Views

Last post by POLAND_SPUD
Sat Dec 01, 2012 11:11 am
Trident Mk. II Build Log

Last post by saefroch
Replies: 131
by saefroch » Wed Apr 13, 2011 4:28 pm
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This launcher has been in the works for a rather long time, and I'm glad to see it finally coming together. I'd appreciate any non-obvious advice,...

Last post

Day 2 of machining, good progress. New pump completed, 3/8 diameter head, 12 stroke:

Sorry for the terrible picture quality, all I have at school...
131 Replies

50210 Views

Last post by saefroch
Thu Nov 29, 2012 11:47 pm
HGDT Max Bar Pres > Cham Pres

Last post by D_Hall
Replies: 5
by saefroch » Tue Nov 27, 2012 7:52 pm

First post

This is the hoped configuration for my current build. Why is the max barrel pressure much greater than the max chamber pressure?

Last post

Yeah, I've got the program architecture and methodology mapped out in my mind for a new program that will combine GGDT and HGDT into one program...

5 Replies

8562 Views

Last post by D_Hall
Tue Nov 27, 2012 11:01 pm
"yankee spirit" full auto/semi cartridge hybrid

Last post by nitrogigi
Replies: 14
by nitrogigi » Wed Nov 21, 2012 6:41 am

First post

Hi!
My project is now mature enough so that I can let you know about it:

generalities:
caliber : 6mm airsoft aluminium BB
canon length : about 550...

Last post

I maid a simualtion with solidworks, with mix10 and a burst disk holding 30 atm. It gave me a fire rate between 250 and 500 shots per minute,...

14 Replies

10652 Views

Last post by nitrogigi
Thu Nov 22, 2012 6:01 pm
problem by designing shell ejection system

Last post by nitrogigi
Replies: 27
by nitrogigi » Thu Nov 15, 2012 8:40 am
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Hi folks,
I'm actually designing an hybrid full automatic spudgun, where then chamber is a shell i've already designed, wich include ignition...

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this will only be for very light machining, and I'll add a bearing above the chuck, the heaviest machining I'll do may be milling 1 mm of aluminium...
27 Replies

13981 Views

Last post by nitrogigi
Tue Nov 20, 2012 5:42 pm
The Pipe Dream lives...

Last post by jrrdw
Replies: 78
by D_Hall » Mon Feb 11, 2008 8:45 pm
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...well, not yet. But the idea is alive and well and gaining some support at the office (these things take time!).

For those of you who've no idea...

Last post

I have a few pipe dreams 60k could take care of. :twisted:
78 Replies

38576 Views

Last post by jrrdw
Fri Nov 16, 2012 3:31 pm
+20x piston hybrid

Last post by Gunner
Replies: 5
by Gunner » Wed Oct 31, 2012 3:05 pm

First post

As you can see the title, Im designing high mixture hybrid and one thing that is the problem is this:

What kind of piston area ratios you guys use?...

Last post

OK, thanks for good answers. What is max ratio(piston area: thin area ) that is safe to use? I think that 6 sounds ok, but 7-> sounds risky because...

5 Replies

4657 Views

Last post by Gunner
Tue Nov 06, 2012 5:18 am
percussion cap ignition?

Last post by POLAND_SPUD
Replies: 16
by steven_main » Wed Oct 31, 2012 10:52 am
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Just hypothetical, what would happen if you used shotshell primers as an ignition source? Would this cause DDT? Im not going to attempt it because of...

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turn one cylinder of the engine into an air compressor. heh good one - at least you'd improve efficiency of the air compressor as heat from the...
16 Replies

6795 Views

Last post by POLAND_SPUD
Sat Nov 03, 2012 2:43 am
Problem with Spark Plug

Last post by jackssmirkingrevenge
Replies: 42
by MrCrowley » Fri Aug 31, 2012 10:22 pm
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Had some problems with my piston hybrid the last few days. I finally installed a spark plug to replace the home-made electrodes but I was never able...

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It would be so heavy and unwieldy.

Well, if you could get your hands on another barrel that's threaded on the muzzle end...
42 Replies

16166 Views

Last post by jackssmirkingrevenge
Thu Nov 01, 2012 2:23 pm
20 Cubic foot oxy bottle cannon idea

Last post by jackssmirkingrevenge
Replies: 10
by steven_main » Tue Oct 30, 2012 12:29 pm

First post

bottle is Stamped DOT-3AA-2015 (pressure tested safe work rating)
Just want to be certain this idea sounds safe and effective to the experts for 10X...

Last post

Recoil will be substantial but won't knock you off your feet.

This is probably what awaits you:

Of course if the line of thrust is over the...

10 Replies

4599 Views

Last post by jackssmirkingrevenge
Wed Oct 31, 2012 12:43 am

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