SpudFiles

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.

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.

I suggest replacing the muzzle break with a muzzle brake, they are better at reducing felt recoil

You'll definitely hit at least 3x10^8 m/s, and probably more than 4x10^69 J.

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. Muzzle BRAKE. YOU WANT A PIECE OF THIS!?!?!? Breech Loading systemMore breech Loading System Metering System to the Chamber.Rear Metering valve. Front Metering Valve.The whole cannon with a cat for scale.Cannon with propane tank for scale. My 3in. U Bend.Finally the back half of the cannon.

That is one big maternal intercourser!



... or are they?

I doubt that muzzle brake is going to be very effective but better than nothing

That is one big maternal intercourser!

I don't know if this expression is better than the original or worse
Pretty sure the elbows are not pressure rated, you can see the seams. Pressure rated one are often shorter and seamless.

Also, this looks like your evil cat just murdered something.

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

[youtube][/youtube]

I checked they say pressure rated of the labels.

I do have to admit, cats for scale are definitely better than toes for scale.

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?

The spud gun kitty returns.