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

1112902 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

719004 Views

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

Topics

2" Union Burst Disks

Last post by whoa044
Replies: 20
by whoa044 » Fri Sep 24, 2010 11:51 pm
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I was wondering, since I never got the opportunity to test out a soda can cutout to see its bursting pressure, has anybody ever done so with a 2...

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A 6x mix gave me 600 more fps, compared to an incomplete 10x burn.
I'll either use tin cooking pans, or 14 gauge sheet metal. Trying to get a burst...
20 Replies

7251 Views

Last post by whoa044
Wed Sep 29, 2010 12:28 pm
New fuel/air injection method?

Last post by D_Hall
Replies: 18
by whoa044 » Thu Sep 23, 2010 10:44 pm
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Has anybody thought of a design in which we don't use one meter pipe (for fuel), but we use two meter pipes? One for air, and one for fuel. The fuel...

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The idea behind the same pressure and two orifice sizes is it can be used for various delivery pressure while maintaining the same ratio, such as...
18 Replies

6071 Views

Last post by D_Hall
Mon Sep 27, 2010 8:44 am
Barrel diameter size tolerances

Last post by Technician1002
Replies: 18
by BigBang J » Thu Jul 15, 2010 4:18 pm
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How close do you want the ID of your barrel to the OD of your ammo?
if using 1/4 OD ammo can you use a barrel with an ID of 0.245 or 0.249 ? Or...

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I would have cut out foam cylinders (like the soft foam used in cheap beds) with a section of the barrel and a hammer. Then glue them to the sphere...
18 Replies

5808 Views

Last post by Technician1002
Sun Sep 26, 2010 11:31 pm
Spark Plugs

Last post by dewey-1
Replies: 11
by Lockednloaded » Sun Sep 12, 2010 12:02 am

First post

I Am in the building stage if a medium sized hybrid, and I only lack one major component. I still need a spark plug capable of handling 10x mixtures....

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theirs no need to mod them, its already 1/8'' NPTF( the F is for fuel) which are a little tight on standard NPT taped hole.

10mm x 1.0 mm is not...

11 Replies

4710 Views

Last post by dewey-1
Sun Sep 26, 2010 2:05 pm
Fueling with pump

Last post by whoa044
Replies: 18
by Copperboy » Wed Aug 11, 2010 12:24 pm
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I've seen the fueling meter utilizing a shock pump and a torch/lighter to fuel a hybrid but I don't find it right now. That's a great idea and maybe...

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I think the only place where there should be mixed fuel and air is inside the combustion chamber. Anywhere else is dangerous. Just like having a...
18 Replies

12071 Views

Last post by whoa044
Sat Sep 25, 2010 10:35 pm
aluminum bust pressure

Last post by ilovefire
Replies: 12
by ilovefire » Thu Sep 23, 2010 5:54 am

First post

would anyone know what the burst pressure of 14mm ID 1mm walled aluminum tube and would like to know if it could take a 10-15x mix, it is what i am...

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I like the bust disks better :)

not to mention the hassle of having to cut burst disks etc.

hassle? what do you mean how do you cut them out?

12 Replies

5961 Views

Last post by ilovefire
Fri Sep 24, 2010 4:45 am
Semi final stainless steel gun

Last post by jackssmirkingrevenge
Replies: 69
by fred » Mon Sep 17, 2007 11:30 am
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Almost finished gun. It fires on ox. and propane. I will post more pictures in the album soon. Shoots through 1/2 plywood with a potato slug from 40...

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Hi to all. I have not been on here in a few years, had so many other projects to do.

The forum has a non-spudgun related projects section ;)

Hope...
69 Replies

35314 Views

Last post by jackssmirkingrevenge
Fri Sep 24, 2010 4:18 am
Pop-Off hybrid valve

Last post by saefroch
Replies: 23
by Lockednloaded » Sat Sep 18, 2010 3:37 pm
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I have been inspired to convert my burst disk hybrid into a piston hybrid by awful galvanized unions that couldn't hold air to save their lives. I...

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As thick as you can get it without jeopardizing the strength of the material it's around, hardness really doesn't matter. Softer will seal better but...
23 Replies

10797 Views

Last post by saefroch
Wed Sep 22, 2010 4:06 pm
Hybrid piston pilot valve. Your input please

Last post by Gun Freak
Replies: 26
by BigBang J » Tue Sep 14, 2010 8:12 pm
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O.K. I think I have got the idea now. Please let me know what you think of this design for a valve. The first design in the picture is the one that I...

Last post

It is getting more and more like SB15's valve, with a tapered seal at the back, you can completely vent the air behind the piston for greater flow...
26 Replies

9830 Views

Last post by Gun Freak
Wed Sep 22, 2010 4:00 pm
Semi-Hybrid?

Last post by Gun Freak
Replies: 11
by Insomniac » Sun Sep 19, 2010 9:55 pm

First post

This is continued from my successful hijack of JSR's topic :D

I'd post a proper description of what this is, but all the info is in JSR's thread...

Last post

Yeah that really is a great picture, similar to the one in your avatar. What exactly is the one in your avatar?

11 Replies

5517 Views

Last post by Gun Freak
Wed Sep 22, 2010 3:55 pm
Shots per Minute

Last post by D_Hall
Replies: 6
by Wilson276 » Sat Sep 18, 2010 11:03 pm

First post

How many shots per minute could a hybrid cannon reach with a mix of 5x of MAPP without getting too hot?

I want to construct a high powered cannon...

Last post

It all depends on how much money you want to spend....

With an unlimited budget and a dedicated professional-level effort, 10 rounds per second is...

6 Replies

2448 Views

Last post by D_Hall
Tue Sep 21, 2010 10:16 am
CpTn's Mini Hybrid

Last post by jackssmirkingrevenge
Replies: 19
by CpTn_lAw » Wed Sep 08, 2010 9:49 am
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Hey there! As some of you know i've been working on a mini hybrid lately, and have succeeded. The specifications are as follows:
chamber is 46 cc,...

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that is fast! long barrels and big chambers may be noisy and cumbersome, but there certainly are benefits :)
19 Replies

8312 Views

Last post by jackssmirkingrevenge
Sun Sep 12, 2010 12:07 pm
mini hybrid fail

Last post by ilovefire
Replies: 19
by jackssmirkingrevenge » Sun Sep 05, 2010 5:01 am
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At least my ears have stopped ringing :roll:

I was testing this hybrid , after a few clicks it ignited at 6x, so I decided to up it to 8x, with a...

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well i am using 13mm ID 1mm walled aluminum so that should but enough for a few x hybrid.

That looks about right, area goes down exponentially with...
19 Replies

5483 Views

Last post by ilovefire
Mon Sep 06, 2010 1:40 am
Hybrid build thread

Last post by Heimo
Replies: 18
by Heimo » Tue Jun 22, 2010 3:28 pm
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Greetings
I planned to build a hybrid for a few months now. My first Idea was to create a chamber out of cast Aluminum and I actually made one (the...

Last post

Aluminum eventually fatigues regardless of the heat-treatment.
yes that is correct and I did not think about that when I made that valve body, and...
18 Replies

12661 Views

Last post by Heimo
Tue Aug 31, 2010 12:49 pm
Some quick questions

Last post by Gun Freak
Replies: 33
by Lockednloaded » Mon Jul 12, 2010 5:16 pm
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I'm building a QEV semi, but i like customizability, so i decided to make it able to fire full automatically and as a powerful hybrid. To do this I'm...

Last post

It is possible, BtB has done it.
33 Replies

10103 Views

Last post by Gun Freak
Wed Aug 25, 2010 5:52 pm
How To calculate spring specs? Please help!

Last post by D_Hall
Replies: 5
by BigBang J » Tue Aug 17, 2010 4:33 pm

First post

Hi, I need some help here I am working a hybrid with a mix of 7x.
I was wodering how to calculate spring specs for the valve I am building.I mean if...

Last post

1) Hooke's Law
2) Pascal's Law
3) Wikipedia

5 Replies

2217 Views

Last post by D_Hall
Tue Aug 17, 2010 8:37 pm
Revised Hybrid Piston Valve Design

Last post by SpudFarm
Replies: 1
by saefroch » Tue Aug 03, 2010 7:59 pm

First post

After Technician pointed out the obvious failure of my previous configuration, I came up with this design, which seems to me to overcome the issue of...

Last post

Is this a valve housed in a cross fitting? Looks like it and I like it.
But my question is why you don't just funnel the two chambers into one tee...

1 Replies

2094 Views

Last post by SpudFarm
Wed Aug 04, 2010 7:05 am
premixed fuel chamber.

Last post by SpudFarm
Replies: 23
by SpudFarm » Thu Jul 29, 2010 4:44 am
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Hey, I just made a piston hybrid out of spare parts (:D) and it wont fire.

I am using a 6l premixed chamber at 5x. The premixed chamber has a...

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Then I hope to build this as soon as possible.

I will try to get the next diagram exactly to scale, I just have to find the dimensions of the tee...
23 Replies

8074 Views

Last post by SpudFarm
Tue Aug 03, 2010 2:49 pm
Handheld/recoil

Last post by SpudFarm
Replies: 16
by SpudFarm » Tue Jul 27, 2010 4:24 am
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Hello, I am looking to build a piston hybrid for my next project when I have gotten my other hybrid to 20x.

It will be made with a 12.5cm ID by 40cm...

Last post

Sounds quite high, It can probably be shot with golf balls and such ammo though.
If I can manage to lift more after the gun I might make a...
16 Replies

7471 Views

Last post by SpudFarm
Wed Jul 28, 2010 10:46 am
Using PTFE or other flouropolymers as a barrel material

Last post by BigBang J
Replies: 16
by BigBang J » Wed Jul 14, 2010 10:56 am
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Do you guys think that using PTFE or other flouropolymers is a good idea for barrel material on a 10x hybrid?

Last post

10x is about as high as I want to go, maybe up to 12x. But I am looking at normaly opperating at 7x. The point of the teflon liner is to achieve a...
16 Replies

6854 Views

Last post by BigBang J
Sat Jul 17, 2010 12:47 pm
hybrid spring piston venting combustion chamber and valve

Last post by BigBang J
Replies: 9
by BigBang J » Wed Jul 14, 2010 8:52 pm

First post

I have been working on a design for a hybrid combustion chamber with a fairly simple venting procedure. I got the idea from CS's post, spring piston...

Last post

for the ground screw I'll simply tap a hole somewhere on the chamber, probably in the rear plug and attatch the ground to a bolt there. I figured for...

9 Replies

4764 Views

Last post by BigBang J
Fri Jul 16, 2010 7:27 pm
Spring-piston exhausted hybrid chamber

Last post by Hotwired
Replies: 34
by CS » Sun Mar 07, 2010 3:37 am
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I'm thinking to make hybrid chamber, as in revolving chambers(?), that would use a spring loaded piston within the chamber to exhaust. Firstly the...

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Hey guys, pardon my ignorance, but why do you need to cool the chamber? I mean sure you want your chamber to stay at a reasonable temp, but are ice...
34 Replies

12481 Views

Last post by Hotwired
Thu Jul 15, 2010 11:04 pm
pressurised hydrogen/oxygen

Last post by Technician1002
Replies: 15
by jakethebeast » Thu Jul 15, 2010 4:01 am
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hi!

with my experiments of HHO making and im now buildin a piston hybrid pistol, i just got a grazy idea that would it work if i pressurise the...

Last post

But HHO indicates that there is a separate H atom and HO molecule.

The the Chemistry behind the process does not produce what you think it did....
15 Replies

5987 Views

Last post by Technician1002
Thu Jul 15, 2010 10:09 pm
GGDT 4.6 software help and other recommended software

Last post by saefroch
Replies: 20
by BigBang J » Fri Jul 09, 2010 3:50 pm
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I downloaded GGDT version 4.6 today and was playing around with it a little. Funny thing I noticed was when you changed your chambers od the...

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DDT is a very significant phenomenon, because the pressure wave merges with the flame front, creating a pressure spike that is far more powerful...
20 Replies

13144 Views

Last post by saefroch
Tue Jul 13, 2010 6:26 pm
C chamber material, spark gaps and misc. help needed

Last post by BigBang J
Replies: 6
by BigBang J » Fri Jul 09, 2010 2:39 pm

First post

I think I am going to scrap pretty much my whole gun that I have been working on. The combustion chamber was made of 1/8 thick bronze tubing 4 long...

Last post

Is this a combustion or hybrid?

This is a hybrid, I am looking to have a pressure of 1000 psi after combustion.

6 Replies

2909 Views

Last post by BigBang J
Sat Jul 10, 2010 7:16 pm

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