Brobdingnagian Bertha (Giant Fiberglass cannon)

[Zorrowannabe9]

This cannon is constructed of appox 8 feet of 6" Fiberglass steam pipe, rated to 280 PSI. I got the stuff from my grandfather when I was visiting him over the winter break. The bushing in the bell towards the bottom is a 6" slip to 4" female PVC bushing, purchased fom mcMaster. because the pipe however is fiberglass, it didnt fit perfectly, it is therefore rammed in as far as i coul get it, and bolted into place. The ammo stop is a piece of 1/2" threaded rod. Much more infor about this project available over at spudtech in <a href="http://forums.spudtech.com/topic.asp?TO ... 5381">This Thread</a>.

<b>Combustion Chamber</b> - 39" x 6"
<b>Barrel</b> - 54" x 6"
*approx ratio is .72:1
<b>Ignition</b> - BBQ ignitor producing a single spark towards the rear of the chamber.
<b>Primary Fuel</b> - Metered propane, there is a 53" piece of 3/8" PVC tubing. It takes 15 shots with this meter to fuel the chamber.
<b>Ammunition?</b> So what fits in a 6" diameter pipe? Plant pots. And old Large Yuben coffee cans...[twisted]

<a href="http://img243.imageshack.us/my.php?image=img0606nm2.gif" target="_blank"><img src="http://img243.imageshack.us/img243/4417 ... nm2.th.gif" border="0" alt=""></a>
<i>how the pipe was after the insulation was stripped off

<a href="http://img148.imageshack.us/my.php?image=img0607ri8.gif" target="_blank"><img src="http://img148.imageshack.us/img148/3322 ... ri8.th.gif" border="0" alt=""></a>

<a href="http://img243.imageshack.us/my.php?image=img0618av9.gif" target="_blank"><img src="http://img243.imageshack.us/img243/5344 ... av9.th.gif" border="0" alt=""></a>
post-priming and bushing installment

<a href="http://img201.imageshack.us/my.php?image=img0619nt2.gif" target="_blank"><img src="http://img201.imageshack.us/img201/7893 ... nt2.th.gif" border="0" alt=""></a>
ignition on left, fuel injector top-right

<a href="http://img224.imageshack.us/my.php?image=img0635eb9.gif" target="_blank"><img src="http://img224.imageshack.us/img224/7113 ... eb9.th.gif" border="0" alt=""></a>
full cannon shot

<a href="http://img167.imageshack.us/my.php?image=img0637hv5.gif" target="_blank"><img src="http://img167.imageshack.us/img167/2203 ... hv5.th.gif" border="0" alt=""></a>
propane meter

<a href="http://img132.imageshack.us/my.php?image=img0636ym3.gif" target="_blank"><img src="http://img132.imageshack.us/img132/1287 ... ym3.th.gif" border="0" alt=""></a>
projectile stopper

<a href="http://img132.imageshack.us/my.php?image=img0638ty7.gif" target="_blank"><img src="http://img132.imageshack.us/img132/1880 ... ty7.th.gif" border="0" alt=""></a>
flower pot

<a href="http://img411.imageshack.us/my.php?image=img0641ew2.gif" target="_blank"><img src="http://img411.imageshack.us/img411/990/ ... ew2.th.gif" border="0" alt=""></a>
holy coffee can batman!

[MrCrowley]

Cool! How many propane canisters have you gone through yet?

[Zorrowannabe9]

Crowley...thats just creapy...you almsot posted the exact same thing as mark over on spudtech

Neat! How many propane canisters have you gone through yet?

anywho...not one yet, havnt done enough testing.

[MrCrowley]

hmm umm yeah creepy....I dont post on spudtech...










I saw this cannon on SGTC and when i saw it on here that just poped to my head.

[sgehring]

have you tried a cantalope. They make a hell of a mess when they hit

[Zorrowannabe9]

theyre too small, and expensive...6" is larger than it may seem at first.

[Torch]

Wow, great idea! That would be perfect for winter/cold areas. You could put like 7 rolled up t-shirts in there and launch them into a crowd.


Kudos my friend!

[akaddis]

holy crap THATS HUGE!!! That thing can be used in war!! lol I wouldn't want to mess with THAT!!!

[garrettee]

You say cantaloupes are too small. What about small pumpkins?

[zeigs spud]

hella tight man!

[Zorrowannabe9]

pumpkins are expensive too...Though I might have to try one just for the mess..

Thanks for the kudos from ye all 8)

[medievalman]

I think you might be one of the first to make a fiberglass cannon. Great Job!

[Zorrowannabe9]

I have intermittent access to that fiberglass pipe for free. My grandfather owns over 2000' of the stuff. All I have to do is go cut it and drive it back though its a 400mi drive).

[LGM]

Would it be possible to make fiberglass pipe by putting fiberglass coating over PVC pipe?

[Zorrowannabe9]

I suppose, not sure how strong it would be. Be sure though that it would be a messy and expensive process.