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SpudFarm's mini hybrid (vid)

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SpudFarm's mini hybrid (vid)

Unread postAuthor: SpudFarm » Sun Jun 29, 2008 7:25 am

attention: this is a small gun i threw together to test the meter before i go full scale. but it is a fun little toy.

Chamber: two 1/2" hydraulic couplings

Barrel: something i took from a regulator

Mix: i have used 5x (first shot :D ) but i am going to 11x

Material, chamber: two 1/2" brass nipples and two 1/2" stainless couplings

Ignition: the good old camera cap dumped into a coil

Spark gap: 7mm but i think it takes the shorter way into the walls when it has 5x more resistance

Burst disk holder: i made it myself, works better than a union


i did not make this to turn out good or look pretty, as said the only reason i made it was to test the meter.


sorry for the mess on the pics, the cloth is there to hold Larda scratch free, and it is a good place to sit screwing fittings into eachother



DYI: you wasted your money. my gauge cost $20 and works after it got a 5x on it when i left the valve open :oops:


so do you guys have some feedback?


Edit: vid are in, no you can look at my mess :D

[youtube]http://www.youtube.com/watch?v=auFBC2P4U5g[/youtube]
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Attachments
IMG_1597.JPG
IMG_1598.JPG
IMG_1601.JPG
burst disk after a 5x
IMG_1602.JPG
the simple burst disk setup
IMG_1603.JPG
my cheap ass gauge (1-15psi)
IMG_1604.JPG
"damage"
IMG_1605.JPG
"damage" all shots taken with wet tape balls (loud)
Last edited by SpudFarm on Sun Jun 29, 2008 9:48 am, edited 1 time in total.
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Unread postAuthor: psycix » Sun Jun 29, 2008 7:51 am

Nice and small!
Any vid coming up? I'd love to see that in action.

The reason your gauge probably didnt break was that it reacted too slow for the pressure peak.
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Unread postAuthor: SpudFarm » Sun Jun 29, 2008 8:01 am

i also put the 60psi of pre ignition pressure on it.

i may make a vid soon
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Unread postAuthor: DYI » Sun Jun 29, 2008 3:45 pm

Good job SpudFarm. And I didn't waste my money on the gauges. They allow me this wonderful thing called "repeatability" that your setup will never achieve :P
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Unread postAuthor: SpudFarm » Sun Jun 29, 2008 7:37 pm

hehe yes they do if you tap them carefully it fires every time, (but sometimes i put in to much propane in there because of the size)

but all in all the meter came out more compact than i thought it would. now i need one more 1/4" nipple to change out the hose TEE to galvanized :)

after that i have to make the sparkstrip and i can shoot :D
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Unread postAuthor: frankrede » Sun Jun 29, 2008 8:38 pm

Nice job man, all you need to do now is make several of them and make a semi auto
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Unread postAuthor: SpudFarm » Sun Jun 29, 2008 9:08 pm

it i had a 0.42 bar regulator it would have been easy to make a semi with another ignition.

this may be the gun i try my first piston valve on to.
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Unread postAuthor: frankrede » Sun Jun 29, 2008 9:11 pm

I was thinking more along the lines of preloaded catridges
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Unread postAuthor: SpudFarm » Sun Jun 29, 2008 9:12 pm

nah mag and quick change burst disks would have been cooler
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Unread postAuthor: STHORNE » Sun Jun 29, 2008 10:07 pm

Awww, it's so cute! lol

looks (and sounds) like a nice little "beanie-baby" killer :wink:
nice work. would love to see some buck shot in that thing.

And even though it is a mini hybrid you just threw together...you are missing one crucial element. Can you (or anybody) guess what it is?
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Unread postAuthor: SpudFarm » Sun Jun 29, 2008 10:21 pm

thaks,
i can't guess what it is other than power
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Unread postAuthor: bigbob12345 » Sun Jun 29, 2008 10:39 pm

cool little mini.
This has to be one of the smallest hybrids out there
Although if possible I would reccomend that you increase the size of the opening on the burst disk holder. Looks like flow might be a little constricted.
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Unread postAuthor: SpudFarm » Sun Jun 29, 2008 10:43 pm

yeah if i put my air rifle barrel on it i just bore out the end a little bit.

it is so small that one layer of tape has problems to burst at 5x.
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Unread postAuthor: biggsauce » Mon Jun 30, 2008 2:19 am

I like it man, I'll be putting one similar to this together soon
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Unread postAuthor: SpudFarm » Mon Jun 30, 2008 2:24 am

thanks, looking forward to it
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