TBMA-230 Oxy/Propylene Piston Hybrid

Harness the power of precision mixtures of pressurized flammable vapor. Safety first! These are advanced potato guns - not for the beginner.

What do you think?

AWESOME!
18
50%
Mildly interesting
2
6%
I'm scared
5
14%
I'm a pneub, go away hybrid supremacist
4
11%
Should have made a pengun instead
7
19%
 
Total votes: 36
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Moonbogg
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Wed Oct 06, 2010 1:59 pm

I found some cheap high pressure check valves from mc master that I used for the striker. I forgot the number, but search and you will find.
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saefroch
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Wed Oct 06, 2010 2:05 pm

A 1/2" check valve on McMaster rated to 1kpsi is $20.66. I'm pretty sure that the repeated combustion would damage the seals on those though.
whoa044
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Wed Oct 06, 2010 2:42 pm

SpudBlaster15 wrote:Clearly standard ball valves are unsuitable for use on high mix hybrids. I'm currently attempting to locate some high pressure hydraulic valves.
I have a 1" 2000psi rated ball valve. It cost $12.
Clicky

edit: It seems that you'd need to shell out a lot of money to get a hydraulic ball valve, unless if it's smaller than 3/8. Source: Ebay
SpudBlaster15
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Wed Oct 06, 2010 3:04 pm

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Gun Freak
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Wed Oct 06, 2010 4:05 pm

You could just build your own HP check valve.

NICE RECOIL!
LOL at the airsoft shot :D
You should have got footage of the recoil of the motor shot, I'd presume it was pretty substantial? That ball valve got destroyed, lol. Nice video!
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Wed Oct 06, 2010 4:34 pm

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Moonbogg
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Wed Oct 06, 2010 7:20 pm

That was great! Yeah, the oxy shots are brutal on anything thats not metal aren't they? It seems that the heat just frags everything in the chamber.
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SpudFarm
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Thu Oct 07, 2010 5:07 pm

AMAZING GRACE!!

Once more, good job! Next time - more distance to the target. Some "long" range shooting with and without target cam would be nice.

I really appriciate your videos, even though they keep pushing me towards building a new hybrid that can be used more practically.

Stunned again!
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Lockednloaded
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Thu Oct 07, 2010 9:17 pm

Haven't commented in this thread, but I've talked with you about it in the chat room, but still... ITS SUPER L33T AWSUM!@!

The barrel flex is pretty concerning even if you are using ABS, how about adding a muzzle brake to combat the flex?
I love lamp
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Thu Oct 07, 2010 9:34 pm

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SpudBlaster15
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Sat Oct 09, 2010 7:36 pm

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SpudFarm
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Sun Oct 10, 2010 10:10 am

That barrel suport should work, however it wil also put enormous stress on your ball valve.

And to make it look better you can replace the air between the barrel and the support with thin aluminium plates.

Just my opinion :)
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Sun Oct 10, 2010 10:41 am

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SpudBlaster15
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Mon Oct 11, 2010 9:18 pm

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Last edited by SpudBlaster15 on Thu Jul 15, 2021 1:34 am, edited 1 time in total.
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JDP12
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Mon Oct 11, 2010 9:41 pm

holy cow. this thing is so impressive
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