First Cannon Mk1b

Boom! The classic potato gun harnesses the combustion of flammable vapor. Show us your combustion spud gun and discuss fuels, ratios, safety, ignition systems, tools, and more.
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Spitfire
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Sun Jan 20, 2008 12:25 pm

This is my first cannon that i bulit.
Mk1-First Cannon
b-2nd minor change
Here it is nova.

I am planning on putting propane metering on this week, with a chamber fan.

Barrel- 50mm dia
1.5m length

Chamber- 110mm dia.
35cm length.

Any Questions Please ask, and ANY comments, Critisim are welcome.
Attachments
Potato3.jpg
Potato2.jpg
Potato.jpg
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SpudUke5
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Sun Jan 20, 2008 12:30 pm

Looks decent, along with the cb ratio.

Have you tried ne shooting.
4SPC, My 4" piston 3" porting cannon
Memo:
Fix up copper cannon
Fix up 4SPC
Start Stirrup pump
Start Toolies piston bazooka
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STHORNE
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Sun Jan 20, 2008 12:33 pm

nice job for your first cannon.... suspiciously good lol.

questions:
post some damage pics?
range of projectile?
also, how did you get that adapter that connects the chamber and the barrel, i love how its off placed?

keep up the good work
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bigbob12345
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Sun Jan 20, 2008 12:33 pm

good job much better than my first cannon.
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Spitfire
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Sun Jan 20, 2008 12:36 pm

I have had it for over two yearsnow, only recently found out about spud files, thats why all the goodies are comeing on now.

dont know about damage exept for one ocasion when i shot a glass pill bottle at a old wall, on the farm, made a decent mark about 1cm deep.
And have shot apples 250m, and a loose golf ball about 300m.

Thats how they sell the adaptor in South Africa, You also do get the centerd ones at a higher price.

Damage pics to follow
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bigbob12345
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Sun Jan 20, 2008 12:39 pm

Oh so you have been at spudding a long time good to know.

and is this the cannon you supposedly broke the sound barrier with.
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STHORNE
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Sun Jan 20, 2008 12:44 pm

I've been looking for an adapter like that for ever. if you can recall where you got it, please please please tell me.

and is it a 3" - 1" or 3" - 1.5" adapter? :lol:
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Spitfire
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Mon Jan 21, 2008 7:58 am

Store? West Rand plumbing supplies :wink:

Um, Barrel is 2in diameter, 4.9ft length
Chamber, 4.3in dia, 13in length.
all parts of it are comletely sealed with o-rings and washers, including the end cap

sthorne it is a +- 4in to 2in adapter

It is this one Bigbob
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