New Kid with a Beast Cannon

A place for general potato gun questions and discussions.
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Wyatt Clark
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Mon Nov 11, 2013 2:41 pm

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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Mon Nov 11, 2013 7:31 pm

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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Mon Nov 11, 2013 7:57 pm

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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Tue Nov 12, 2013 5:13 am

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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Tue Nov 12, 2013 11:15 am

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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Tue Nov 12, 2013 12:11 pm

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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Tue Nov 12, 2013 12:26 pm

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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Tue Nov 12, 2013 12:29 pm

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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Tue Nov 12, 2013 12:32 pm

I checked they say pressure rated of the labels.
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Ragnarok
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Tue Nov 12, 2013 12:43 pm

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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Wed Nov 13, 2013 7:06 am

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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Fri Nov 15, 2013 8:30 am

The spud gun kitty returns.
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