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

1437826 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

842579 Views

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

Topics

MAPP//PRO Question

Last post by MrPed
Replies: 16
by MrPed » Thu Aug 06, 2009 8:54 am
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Does anyone on the forum have experience with MAPP//PRO, it is different than MAPP supposedly it is propylene. Also, does anyone know the fuel:air...

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Jimmy101 thank you very very much for that valuable info!! :D
Yeah, I was looking for that article, but I was looking under the hybrid section, I...
16 Replies

6397 Views

Last post by MrPed
Thu Aug 06, 2009 4:42 pm
Shear discs?

Last post by D_Hall
Replies: 18
by D_Hall » Wed Jun 10, 2009 10:37 pm
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I'm thinking that for a large bore gun burst discs can be problematic. It occurs to me however, that a solution may be a shear disc instead. More to...

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If it wasn't for the size of the bore there's probably one with what you need more or less off the shelf.
There are off the shelf solutions... And...
18 Replies

7591 Views

Last post by D_Hall
Mon Aug 03, 2009 8:09 pm
Pellet gun hybrid?

Last post by dudeman508
Replies: 3
by scianiac » Wed Jul 29, 2009 1:52 am

First post

Sorry if this is has already been brought up but the search gives like 500 results.

Has anyone ever tried to convert a pump pellet rifle into a...

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My uncle tried that, only he just put sewing machin oil in the gun and he got his pelets supersonic. The spring compression ignited the oil, and it...

3 Replies

2526 Views

Last post by dudeman508
Wed Jul 29, 2009 7:29 pm
fuel mixing

Last post by Willdebeers
Replies: 10
by ramses » Sun May 17, 2009 9:47 pm

First post

First, the relevant specs of my cannon:
2x12 chamber plus a lot of fittings
manometric metering
ignition: camera flash+ignition coil (tested to work...

Last post

You could always add a fan (brushless preferably) to aid mixing.

10 Replies

4786 Views

Last post by Willdebeers
Tue Jul 28, 2009 5:57 am
Thoughts on real rifle barrels and hybrids

Last post by MrCrowley
Replies: 46
by MrCrowley » Thu Jul 09, 2009 4:27 am
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I understand that it probably takes close to a thousand if not more PSI to be able to get a real bullet to be rifled by a real rifle barrel. So I was...

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Far beyond my budget but still very interesting nonetheless. :)
46 Replies

39849 Views

Last post by MrCrowley
Sat Jul 25, 2009 1:43 am
TeaBrid

Last post by theBOOM
Replies: 11
by inonickname » Tue Jul 21, 2009 4:22 am

First post

Nothing particularly special here- just a hybrid inside a 1/4 tee. It's just practice for the 200x mini- mainly in fueling. However, the 200 will...

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thanks ino and happy bday for you too
im getting 500 dollars for my bday,too bad ive been sick with an outer ear infection.... i hope it goes away...

11 Replies

5371 Views

Last post by theBOOM
Tue Jul 21, 2009 8:42 pm
First Hybrid (with Videos)

Last post by ramses
Replies: 32
by vince » Thu Jun 18, 2009 9:36 am
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This is my first hybrid. I hope you like it.

Barrel: 2,5m long, 26mm ID, 28mm OD
Chamber: 20 cm long, 2'' diameter (about 660ml)
Ignition:...

Last post

now I wanna shoot my hybrid in the basement! That is some beastly penetration
32 Replies

18812 Views

Last post by ramses
Fri Jul 17, 2009 3:44 pm
555+mosfet+ignition coil ignition

Last post by Technician1002
Replies: 17
by Copperboy » Mon Jul 13, 2009 3:52 am
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I've always wanted to build a simple and powerful ignition system, and I think I finally found it! At least it's powerful! As I not are that into...

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Maybe I don't need it, but it would draw less current. But yeah, 5mm is a bit overkill.

To save power, but still have a long powerful spark, simply...
17 Replies

16010 Views

Last post by Technician1002
Thu Jul 16, 2009 11:19 am
Fuel injector

Last post by jimmy101
Replies: 6
by daccel » Tue Jun 30, 2009 1:19 am

First post

Working on the injector part of a liquid fueling system now. The plan is to use a spool valve to meter a very small amount of liquid. Reservoir air...

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On the flashback issue, I can understand not wanting high pressure to transfer back to the fuel reservoir which may be lower strength, but if there...

6 Replies

6879 Views

Last post by jimmy101
Wed Jul 01, 2009 1:08 pm
5 shot hybrid repeater

Last post by spudamine
Replies: 26
by spudamine » Sat Jan 24, 2009 6:56 pm
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This is my second cannon and my first foray into the world of combustion, she's not finished yet but I think there's enough material here to share....

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Thanks Mark, I'm betting you saw the damage picture I posted in another topic, though what the hell did that and had a bit of a search :)
When I...
26 Replies

19115 Views

Last post by spudamine
Tue Jun 30, 2009 2:58 pm
Can someone check these metering calculations?

Last post by Dave_424
Replies: 8
by Dave_424 » Wed Jun 24, 2009 10:25 am

First post

Hey guys, just wondering if someone could check over these calculations for manometric metering

Volume of the chamber = 19.6349541 * 28 = 549.778715...

Last post

Thanks for that Mark

That really helped, Im now confident that my numbers are correct.

Now to order the parts and start assembling

Dave

8 Replies

3383 Views

Last post by Dave_424
Wed Jun 24, 2009 8:37 pm
How much pressure will this chamber take?

Last post by Dave_424
Replies: 19
by Dave_424 » Mon Jun 22, 2009 4:04 pm
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Hey guys, I have a sodastream bottle that is pressure tested to 3600 psi

What X mix do you think I could use it to? The fittings will be 1/4 steel...

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That is the hole that I am tapping, I am not worrying about te cylinder walls, Just showing that there is sufficient material to hold the threads...
19 Replies

5347 Views

Last post by Dave_424
Tue Jun 23, 2009 3:55 pm
Starting a project to break the SOS :)

Last post by Dave_424
Replies: 12
by Dave_424 » Mon Jun 22, 2009 7:20 pm

First post

Right guys, I have a odastream bottle that is tested to 3600 psi and am going to build a high pressure hybrid.

I will tap a 1/4 thread into the...

Last post

Woah thats a mighty long post .

Okay then, I will reach 15X with my fridge compressor capable of 60 BAR

I might not even take it to 15X for a...

12 Replies

3667 Views

Last post by Dave_424
Mon Jun 22, 2009 8:53 pm
Swing check valve for burst valve?

Last post by psycix
Replies: 8
by auxiliary » Sat Jun 20, 2009 7:42 pm

First post

Instead of making a piston the way Fnord did with his hybrid, would it be effective to install a strong spring inside a swing check valve so it...

Last post

You want this thing to pop open instead of leaking. The simplest way to do such thing is to make it have extra surface area as soon as it starts...

8 Replies

5220 Views

Last post by psycix
Mon Jun 22, 2009 5:38 am
Another random thought....

Last post by Carlman
Replies: 13
by D_Hall » Thu Jun 18, 2009 8:46 am

First post

A few weeks back I started complaining to the powers that be. We were WAY behind schedule because my crew kept getting pulled off my project to work...

Last post

Hooray for human sized bore!! :cheers:

Top priority spud gun FTW!

13 Replies

4729 Views

Last post by Carlman
Fri Jun 19, 2009 11:01 am
oxy vs air & oxy regulator

Last post by Biopyro
Replies: 32
by Moonbogg » Tue Jun 02, 2009 5:43 pm
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I will be using oxygen to increase power rather than using compressed air. Is the power the same between the two assuming of course the correct...

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You may get unexpected combustion speed with no nitrogen buffer. It may be a true explosive mixture which is against the forum rules. I mentioned it...
32 Replies

11282 Views

Last post by Biopyro
Wed Jun 10, 2009 4:36 am
its going down

Last post by psycix
Replies: 15
by Moonbogg » Fri May 22, 2009 2:47 am
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+ + =

A little ID sanding and UHMW bushings will make this a beautiful golf ball barrel insert that will slide right into the existing barrel....

Last post

Just park your car at a distance and keep wind direction in mind. It never comes straight down into the barrel, making a random hit somewhere around...
15 Replies

4758 Views

Last post by psycix
Wed Jun 10, 2009 3:27 am
Pipe bugs... way cool.

Last post by Technician1002
Replies: 69
by D_Hall » Thu Jan 15, 2009 9:43 pm
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Just got a new tool delivered this week that makes pipe cutting operations very smooth. I highly recommend a pipe bug if you have the need to cut...

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And since this is an on-going off-topic thread - What would be the best approach for a mechanical engineering student in college to get involved in...
69 Replies

18462 Views

Last post by Technician1002
Wed Jun 10, 2009 1:31 am
Diesel copper gun

Last post by jeepkahn
Replies: 12
by jmeyer1022 » Wed Jun 03, 2009 2:01 pm

First post

I was thinking about doing it with PVC, but I don't think it could take the pressure. I got the idea after see this

I'd want to go on a larger bore...

Last post

And I just did some digging and for a given chamber diesel will produce up to 2600psi during the burn process... so just build your chamber to...

12 Replies

5318 Views

Last post by jeepkahn
Thu Jun 04, 2009 1:14 pm
Spray n pray hybrid

Last post by jackssmirkingrevenge
Replies: 10
by daccel » Sat May 30, 2009 1:01 am

First post

Current project is still under development, and I wanted something to take camping this weekend, so I threw this together.

It has .75 chamber, .569...

Last post

For science!

Sweet, and that ali furniture looks very promising :D

10 Replies

4707 Views

Last post by jackssmirkingrevenge
Thu Jun 04, 2009 1:08 am
Combustion containment

Last post by Moonbogg
Replies: 11
by Moonbogg » Sun May 24, 2009 11:33 am

First post

Quick question here...I was thinking about getting a camlock plug and doing some combustion containment with a pressure gage connected to the chamber...

Last post

If you can get some good data for 1x you should be able to extrapolate that out for 2x and 3x...not sure it's really necessary to test those unless...

11 Replies

3141 Views

Last post by Moonbogg
Mon May 25, 2009 1:51 am
Diesel+Autoignition idea

Last post by POLAND_SPUD
Replies: 16
by auxiliary » Wed May 20, 2009 8:38 am
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The concept of igniting a fuel in a combustion chamber using just pressure is pretty widely used. This is a video of a guy that uses the diesel...

Last post

@ tech

yeah maybe... but you won't know unless you test it...

Maybe a premix would be better with some kind of super light piston but the point of...
16 Replies

5120 Views

Last post by POLAND_SPUD
Thu May 21, 2009 10:59 am
QEV/Pop off hybrid?

Last post by boom_o_matic_2.0
Replies: 13
by boom_o_matic_2.0 » Sun May 17, 2009 9:59 am

First post

I'm not entirely sure but I don't think any one has tried it but do you think a QEV/Pop off valve would work in firing a hybrid cannon? I would try...

Last post

dont worry. that IS something to brag about.

13 Replies

3501 Views

Last post by boom_o_matic_2.0
Tue May 19, 2009 9:36 am
Liquid fueled hybrid

Last post by daccel
Replies: 19
by daccel » Thu May 14, 2009 12:31 am
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I was thinking about using methanol in a hybrid, but would the liquid not evaporate under pressure? Or if you heated it to evaporate would it...

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Well it would be easy enough to do some trial and error with and without a wick, I suppose.

Forgot to show it in the diagram, but the idea is to...
19 Replies

10628 Views

Last post by daccel
Mon May 18, 2009 11:58 pm
Converting a pneumatic into hybrid using shock heating

Last post by KineticAmbitions
Replies: 23
by psycix » Tue May 05, 2009 4:56 pm
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Im throwing out this crazy idea I had. :)

Say you have a normal pneumatic launcher, lets assume a barrel sealing piston valve for now and pressurize...

Last post

You are now talking about light gas guns. Have the piston have a larger diameter then the projectile.

The piston need not be a larger diameter than...
23 Replies

10894 Views

Last post by KineticAmbitions
Sun May 17, 2009 3:14 pm

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