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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First post

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

977793 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

652309 Views

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

Topics

Propane + Oxygen + Steel Gun

Last post by Moonbogg
Replies: 12
by xequa » Wed Mar 17, 2010 1:42 am

First post

Hi folks, I'm trying to design a steel potato cannon that uses propane and a bit of O2 to generally increase the % of available combustible matter in...

Last post

Any suggestions on how to make this thing cheaper? 3 black steel pipe is very expensive... at this point I'll have to wait to build the thing till......

12 Replies

6481 Views

Last post by Moonbogg
Fri Mar 19, 2010 12:34 am
busy with 10X hybrid (still in the design phase)

Last post by Heimo
Replies: 2
by Heimo » Mon Mar 15, 2010 1:34 pm

First post

Ok now that I finally understand how hybrid fueling works I think it is high time I start on building one. The part I am still little fuzzy about is...

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How are you buying the Aluminum, as tube or as bar and then machining it?

:D :D you will have to wait and see, but I guarantee that I will keep...

2 Replies

1346 Views

Last post by Heimo
Mon Mar 15, 2010 3:55 pm
Hybrid piston valve

Last post by ramses
Replies: 4
by niglch » Thu Mar 11, 2010 2:24 pm

First post

Well I'm home for the week without much to do so the only logical course of action was to start drawing designs for a hybrid piston valve. Of course...

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Yes, more volume would help, but dead space in the pilot won't. You want the pressure to ramp way up before the piston hits the back of the tube....

4 Replies

2772 Views

Last post by ramses
Sat Mar 13, 2010 7:32 pm
how hybrids are filled

Last post by MrCrowley
Replies: 2
by bighead33 » Wed Feb 24, 2010 11:58 pm

First post

how am i suppose to fill my hybrid exactly, am i suppose to ad my propane then ad my air or what :?:

Last post

khepera1997?

You've been plaguing this forum with ridiculous hybrid questions lately. Four individual topics for each of your four posts, two per...

2 Replies

2130 Views

Last post by MrCrowley
Thu Feb 25, 2010 12:39 am
large hybrid

Last post by artillerycreations
Replies: 25
by artillerycreations » Wed Dec 23, 2009 7:55 pm
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I was just wondering if .188 wal 6 inch galvanized steel would hold up to say a 3-5x mix and in what length would i have to worry about detonation. I...

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I am considering using an 80 cf empty high pressure cylinder. In the attached file i would cut the neck to accept 3'' pipe inside of it. It would be...
25 Replies

9541 Views

Last post by artillerycreations
Mon Feb 22, 2010 7:17 pm
hybrid mixtures

Last post by jimmy101
Replies: 4
by bighead33 » Fri Feb 19, 2010 2:37 pm

First post

i herd that for my hybrid cannon i am going to use 5x more air than i use propane. is that true

Last post

You then pressurize with air to a bit more than 5 ATM.

It is worth noting that this is absolute pressure, and that we have one ATM (14.7 PSI) all...

4 Replies

1880 Views

Last post by jimmy101
Fri Feb 19, 2010 5:06 pm
Air/Fuel Percentages for Propane

Last post by MrCrowley
Replies: 2
by khepera1997 » Thu Feb 18, 2010 6:28 pm

First post

Thank you for Your Replys you Really Helped Me But Now all i Have is One More Questions and that is: how Much Air/Propane Should i use (S.P. id...

Last post

And I keep telling you to search! You obviously have no clue what you are doing if you think we can just give you a fixed PSI (unless it was...

2 Replies

1559 Views

Last post by MrCrowley
Fri Feb 19, 2010 6:38 am
Stoichiometric's (A.K.A. Fuel/Air Ratio)

Last post by rcman50166
Replies: 6
by khepera1997 » Wed Feb 17, 2010 10:56 pm

First post

I am in the Process of Building a Spud Gun and iv Got Every Thing Down But The Stoichiometric's. (A.K.A. Fuel/Air Ratio)

Number One:I Can Calculate...

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So on an O 2 sensor, I would be looking for a number ideally around 12.5? I just want to be sure. I'm going to be fine tuning an engine and need that...

6 Replies

4391 Views

Last post by rcman50166
Thu Feb 18, 2010 3:55 pm
Oxygen amounts...

Last post by deathbyDWV
Replies: 4
by deathbyDWV » Wed Feb 03, 2010 10:27 pm

First post

Alright, so I have a question about my oxygen for my new hybrid.

For this post I'm going to say that:

air is 20% oxygen and 80% nitrogen...

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Yes I've done lots searching and reading on oxygen hazards. The most pressure the oxygen will experience outside of the tank is under 15 psi. That...

4 Replies

2362 Views

Last post by deathbyDWV
Thu Feb 04, 2010 7:55 am
Hybrid peek...

Last post by deathbyDWV
Replies: 11
by deathbyDWV » Fri Jan 29, 2010 10:08 am

First post

Yeah that's right. I've been building a hybrid. Actually since about august now. Because of school I haven't had much tine to work on it. But it's...

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There is a 1 inch union at the back of the barrel.

I'm not sure about what material I will certainly be using.

I'm thinking about these...

I'd...

11 Replies

4781 Views

Last post by deathbyDWV
Fri Jan 29, 2010 5:11 pm
high mix hybrid ideas and questions.

Last post by Jeeperforlife
Replies: 19
by Jeeperforlife » Tue Jan 26, 2010 11:36 pm
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I have been trying to come up with a good way to build a hybrid that could take high mixes but not require a lathe. My hopes are 200X mixes. Here is...

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If you weld the tubes in place, then you just lost the point of having bolts. You will be relying on the strength of the welded tubes and not the...
19 Replies

7594 Views

Last post by Jeeperforlife
Fri Jan 29, 2010 12:27 am
Hybrid preview

Last post by CpTn_lAw
Replies: 6
by CpTn_lAw » Fri Jan 22, 2010 11:01 am

First post

Ok everyone hello!
I've been wanting to do this for a long time now, almost came to finish it! A 5x, handheld on rifle stock, on-board propane...

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Ok I ran some numbers through HGDT !! I must say i'm quite surprised about the power difference between each number of mix.
HGDT predicts that with...

6 Replies

2598 Views

Last post by CpTn_lAw
Sun Jan 24, 2010 11:08 am
My handheld rifle hybrid (Pictures now up)

Last post by CpTn_lAw
Replies: 7
by JDP12 » Tue Dec 29, 2009 3:49 pm

First post

Hey all, I'm proud to present my finally working hybrid! Been tryin to get it going on and off for a year or so.

I've only tested it without a...

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Where are the pictures!!!! :D

sorry for kicking old topic... :oops:

7 Replies

4107 Views

Last post by CpTn_lAw
Fri Jan 22, 2010 5:05 am
Hot Three Piece

Last post by Carlman
Replies: 40
by CasinoVanart » Fri Aug 08, 2008 3:55 am
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I feel kinda lame posting this after Larda's huge win but i will anyway :)

It's a three piece stainless hybrid that i made about 4 months ago its...

Last post

heyyyyyyyyy im here.

Its been a while but now i have employment and money i may get back into spudding a bit.

1km3t: Ill see what I can do :D
40 Replies

20452 Views

Last post by Carlman
Wed Jan 20, 2010 10:45 am
What will they think of next...

Last post by Hubb
Replies: 10
by MrCrowley » Mon Jan 18, 2010 4:18 am

First post

Anyone heard of things like these?

The Ultimate in Pest Control.

The Rodenator R3 uses a proprietary method to proportion, compress and inject...

Last post

hahaha, ive heard of using a pneumatic to unblock a kitchen sink, but this is just nuts!! I've done it , and now, to complete the collection of...

10 Replies

2851 Views

Last post by Hubb
Tue Jan 19, 2010 8:35 am
2 X Spring Piston Hybrid

Last post by Rocketmanstu
Replies: 11
by Rocketmanstu » Thu Jan 14, 2010 1:02 pm

First post

Hi from Canada , I am mulling around an idea here goes ,
I am building this into a 3 T , a piston valve held against the combustion chamber outlet...

Last post

PVC not good for hybrids ,thanks for the input.Safty first I guess within reason of course LOL
Stu 8)

11 Replies

4138 Views

Last post by Rocketmanstu
Thu Jan 14, 2010 7:30 pm
Hybrid Safety Question

Last post by Heimo
Replies: 9
by Rob748 » Sat Jan 02, 2010 2:05 pm

First post

Hi, I want to make a hybrid cannon, but out of PVC, Ive heard of the danger of ing polyvinlychloride, But I was pre planning, a 2inch schedule 80 or...

Last post

I am fairly sure a metal fan would survive like this one I made a couple of days ago

Looks good, did you use an existing fan as a mould and cast...

9 Replies

8006 Views

Last post by Heimo
Sun Jan 03, 2010 2:04 pm
Regulator flow rates

Last post by kenbo0422
Replies: 31
by kjjohn » Sun Dec 13, 2009 12:35 pm
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I am currently working on designing and building a very advanced rapid-fire hybrid cannon, and I need to know if the regulators will be able to fill...

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The only O-ring that I know of that is made for high temp is silicon. The McMaster site should be able to help you out there. There are others that...
31 Replies

10573 Views

Last post by kenbo0422
Fri Dec 18, 2009 5:59 am
Hybrid Piston Valve Design

Last post by frocksie
Replies: 6
by frocksie » Mon Nov 30, 2009 10:14 pm

First post

I am designing a hybrid piston cannon and I would like to attain 8x mixes.

The design is an improvement of this design . I am wondering what...

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How might you propose to redesign it? I would like to keep the general design, but I am open to some changes.

6 Replies

4616 Views

Last post by frocksie
Tue Dec 01, 2009 7:01 pm
Quick hybrid piston valve question

Last post by ramses
Replies: 17
by sharpshooter » Tue Nov 10, 2009 9:27 pm
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Transferring from a private college to a state school has been a hell of a change. A) i have a hell of a lot more free time on my hands, and B) i now...

Last post

there will still be a large amount of force on the piston. Before the valve opens, the piston will be subjected to a very high pressure in the radial...
17 Replies

7827 Views

Last post by ramses
Sat Nov 28, 2009 3:41 pm
ignition and mix

Last post by jackssmirkingrevenge
Replies: 13
by ceizz » Wed Nov 11, 2009 10:37 am

First post

hello every body, i am french and if Mr le capitaine can come talk french to me i will feel very better.

its ok, my question for ignition is : about...

Last post

Yes, 8% of the total chamber volume. For example if your chamber volume is 500mL, then the amount of butane you have to inject is 40mL.

13 Replies

3735 Views

Last post by jackssmirkingrevenge
Mon Nov 23, 2009 11:35 am
Hybrid Fuelling Help

Last post by john bunsenburner
Replies: 1
by Crna Legija » Sat Nov 21, 2009 5:50 am

First post

I'm planing to make a hybrid over the shool holidays and just wanted to make sure that i know how to fuel correctly. I read HYBRID FUELING 101 and i...

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Well for all what i know you would want the same percentage through out, otherwise by the time you reach 25x you have only butane... The percentage...

1 Replies

1560 Views

Last post by john bunsenburner
Sat Nov 21, 2009 6:34 am
Hybrid PVC GB barrel question

Last post by c11man
Replies: 2
by deathbyDWV » Tue Nov 17, 2009 9:25 pm

First post

Hey guys. I've been working on my hybrid and really want a golfball barrel.

I was wondering if a PVC golfball barrel, 1.5 sdr 21 (rated to 200psi...

Last post

yes it would be able to handle it, and for quite a bit of time on only 2x. get higher mixes and then you run into trouble

2 Replies

1357 Views

Last post by c11man
Tue Nov 17, 2009 9:35 pm
what do you think about this piston systeme ?

Last post by ceizz
Replies: 20
by ceizz » Thu Nov 12, 2009 2:14 am
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all in the subject title :
what do you think about this piston systeme ?

i need your comments !

Last post

i like training my english so why i am here :D
20 Replies

4710 Views

Last post by ceizz
Sat Nov 14, 2009 8:53 am
Hybrid Fuel Meter Pressure?

Last post by starman
Replies: 13
by kjjohn » Thu Nov 05, 2009 6:09 pm

First post

I was calculating the fuel meter size/pressure for a 6x hybrid on HGDT, when I realized that the number start to get very big. With a 127ci chamber...

Last post

How long would a MAPP tank last with using such high pressures?

A tank of MAPP is likely to last the useful life of your cannon....mostly meaning...

13 Replies

3314 Views

Last post by starman
Fri Nov 06, 2009 12:21 am

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