New Kid with a Beast Cannon

A place for general potato gun questions and discussion.
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Wyatt Clark
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Hey guys I'm new here and I've been working on the awesome cannon, its not quite done yet, and I wanted to know what you guys thought of the specs and how powerful you think it will be.

Material: Sch. PVC
Fuel: Propane
Fuel system: Closed Metered Propane System
Ignition: Electric BBQ Igniter
Barrel Diameter: 2 in.
Barrel Type: Breech Loading
Barrel Length: 8 ft.
Muzzle Break: Yes
Combustion Chamber Diameter: 4 in.
Combustion Chamber Length: 4 ft.
Color: Camouflage
Overall Length: 9 ft.
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Ragnarok
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There's nothing dramatic in the specs, aside from quite a large size.

Dependent on exact design (it's not clear what your basic configuration is), the accuracy of your metering and whether you have a chamber fan, a guess on velocity/energy with a typical spud would be up to about 450fps and 1200 ft-lbs (or for those sensible people who use metric, 140m/s and 1600J), possibly up to about a quarter mile (400 metres) range*.

*Taters aren't really aerodynamic enough to do much more than this, regardless of how many "OMG I used a hole can of hairspray and teh gun expluded and the potato flyed three miles" claims that might appear around the internet.

Beyond that, there's not really much to say without seeing it.
Does that thing kinda look like a big cat to you?
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jackssmirkingrevenge
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I suggest replacing the muzzle break with a muzzle brake, they are better at reducing felt recoil ;)
hectmarr wrote:You have to make many weapons, because this field is long and short life
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inonickname
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You'll definitely hit at least 3x10^8 m/s, and probably more than 4x10^69 J.
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Wyatt Clark
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jackssmirkingrevenge wrote:I suggest replacing the muzzle break with a muzzle brake, they are better at reducing felt recoil ;)
LOL already done. Here are some pics.
IMG_43311.jpg
Muzzle BRAKE.
IMG_4332.JPG
YOU WANT A PIECE OF THIS!?!?!?
IMG_4333.JPG
Breech Loading system
IMG_4334.JPG
More breech Loading System
IMG_4337.JPG
Metering System to the Chamber.
IMG_4340.JPG
Rear Metering valve.
IMG_4341.JPG
Front Metering Valve.
IMG_4343.JPG
The whole cannon with a cat for scale.
IMG_4347.JPG
Cannon with propane tank for scale.
IMG_4335.JPG
My 3in. U Bend.
IMG_4342.JPG
Finally the back half of the cannon.
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jackssmirkingrevenge
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That is one big maternal intercourser!

Image

... or are they?

I doubt that muzzle brake is going to be very effective but better than nothing :)
hectmarr wrote:You have to make many weapons, because this field is long and short life
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That is one big maternal intercourser!
:lol: :lol: :lol: I don't know if this expression is better than the original or worse :lol: :lol: :lol:
Pretty sure the elbows are not pressure rated, you can see the seams. Pressure rated one are often shorter and seamless.
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jackssmirkingrevenge
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Also, this looks like your evil cat just murdered something.

Don't forget that it can make an effective silencer:

[youtube][/youtube]
hectmarr wrote:You have to make many weapons, because this field is long and short life
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Wyatt Clark
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I checked they say pressure rated of the labels.
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Ragnarok
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I do have to admit, cats for scale are definitely better than toes for scale.
Does that thing kinda look like a big cat to you?
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Technician1002
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Might want to check this page on identifying the parts.

http://www.spudfiles.com/spud_wiki/inde ... _Rated_PVC

The sockets look shallow and the elbows thin. I would hate to see it come apart in use.

Can you get a macro photo of the rating marking on the 90 degree elbows?
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dart guy
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The spud gun kitty returns.
when life gives you lemons... make root beer and leave the world wondering how you did that :D
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