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burst disk holder's

Post questions and info about hybrid (compressed gas with fuel) powered cannons here. This includes discussion about fuels, ratios, ignition systems, build types, safety, and anything else relevant.
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Unread postAuthor: SpudFarm » Sun Aug 10, 2008 1:58 pm

so i made something i think can work, it is 100% air tight with hand force to clamp down and lung power.

i made it like this: 2" malleable male fitting that i cup some threads off and screwed halfway in a 2" copuling, then i cut out a aluminium ring (3mm thick) and a rubber gasket the same way as the alu plate.

you do it like this, put in the aluminium ring that rotates when you are screwing it all tougether so you don't damage the disk, then the disk on the ring, then you put in the gasket and screw in a brass 2" male nipple to clamp it all together.

enough talk look at the pics. (nipple side of it is for the chamber)

if the disk's slip out of this one you wont hear more from me because i will shoot my head off :D
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Attachments
IMG_1962.JPG
side
IMG_1964.JPG
chamber side view
IMG_1965.JPG
all the parts except the 2" threaded ring in there
IMG_1967.JPG
the threaded ring that will be welded if this works
IMG_1970.JPG
barrel side
"Made in France"
- A spud gun insurance.
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Unread postAuthor: starman » Sun Aug 10, 2008 2:10 pm

Looks good Spud. That rubber gasket has that sort of new-wave circle cut into it I see..... :wink:
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Unread postAuthor: SpudFarm » Sun Aug 10, 2008 2:12 pm

haha don't dizz my rubber :P

the only problem would be to screw this down tight when i have a 21 foot steel barrel on it :roll:

Edit: the holder works, i tried it with a 4layer disk and it got a HOLE and did not just get torn out :D

so bad we have visitors that is here in four more days so i can't try it..

i will try 3x with a 16 layer disk then a 6x with a 32 layer disk, and if it all goes to the right side i try a 10x with 64 layers.

(remember that this have quite small surface area)

i made one more aluminium washer , so the key to hold the burst disk tight was one washer of aluminium on each side of it.
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Unread postAuthor: SpudFarm » Tue Aug 12, 2008 1:11 pm

worked like a dream on 5x!

the gasket got torn in half but it fired, i placed a forged dart in the barrel then put a 2l bottle under the muzzle to get it up from the ground and placed a small 1/4" steel plate infront of a 1/2" aluminium plate. the recoil threw the barrel up high enough to miss the steel and pass through the aluminium like nothing and make a huge hole in the ground where it hit.

the muzzle blast dug a 4" deep hole infront of the muzzle and the vacuum from the chamber sucked in all the dirt :(

pics will follow in the thread about it.. just need some damage first
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