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3/4" QEV PVC cannon! (+nearly finished coax teaser pics
Posted: Thu Aug 28, 2008 7:53 am
by ALIHISGREAT
finally got round to nearly finishing my first cannon!
specs
1m 3/4" PVC barrel
~80cm 1.5" chamber
3/4" QEV
blowgun pilot
good for about 120psi (pipe rated to 160)
Posted: Thu Aug 28, 2008 8:07 am
by starman
Some pretty bad "bowage" on your gray barrel there. Why don't you shorten your stand-off and level it out?
Also, you must be left handed....
Posted: Thu Aug 28, 2008 8:28 am
by ALIHISGREAT
yeah it is pretty bent, i need to get some 22mm copper to put it over then i'll see if heating it will make it retain the straightnesss (although i doubt it will)
and i'm not left handed, the blowgun is like that because there is not quite enough room for it under the chamber so i need to shorten the lever on the blowgun (although its not uncomfortable to shoot)
Posted: Thu Aug 28, 2008 8:34 am
by starman
ALIHISGREAT wrote:yeah it is pretty bent, i need to get some 22mm copper to put it over then i'll see if heating it will make it retain the straightnesss (although i doubt it will)
No need to do all that...just shorten your stand-off under the tee at the end of the barrel and tie it back down.
Posted: Thu Aug 28, 2008 9:33 am
by ALIHISGREAT
it wouldn't work because the barrel is surprisingly flexible and aqlso i haven;t glued the tee on.
Posted: Thu Aug 28, 2008 10:32 am
by MaxuS the 2nd
I think what starman is trying to say is that if you were to shorten the length of the pipe of the barrel support then the barrel would not bow. Starman is correct.
Posted: Thu Aug 28, 2008 10:44 am
by ALIHISGREAT
no because the pipe has always been bent so its nothing to do with the barrel support and it wouldn;'t work anyway unless i glued it and i don;t want to.
Posted: Thu Aug 28, 2008 10:58 am
by Sticky_Tape
You know if you take that brass think out of the end of the blowgun you will get better preformance.
Posted: Thu Aug 28, 2008 11:49 am
by MaxuS the 2nd
ALIHISGREAT wrote:no because the pipe has always been bent so its nothing to do with the barrel support and it wouldn;'t work anyway unless i glued it and i don;t want to.
And what I'm trying to say is that if you were to cut that length of pipe down a little bit, then it would hold the barrel straight.
Posted: Sat Aug 30, 2008 11:23 am
by ALIHISGREAT
yes it would IF I GLUED THE TEE ON WHICH I'M NOT GOING TO DO
Posted: Sat Aug 30, 2008 11:59 am
by MaxuS the 2nd
Why not? This would solve your problem..
Posted: Sat Aug 30, 2008 5:21 pm
by ALIHISGREAT
because then i wouldn't be able to swap out barrels, if i want a longer or shorter or bigger or smaller....
Posted: Sun Aug 31, 2008 11:42 pm
by jackssmirkingrevenge
Nice car!
*ahem* yes, good effort on the launcher, damage pics!
Posted: Mon Sep 01, 2008 2:44 am
by ALIHISGREAT
jackssmirkingrevenge wrote:Nice car!
*ahem* yes, good effort on the launcher, damage pics!
you are talking about the red monster truck in the background of the TVR pic right?
oh and yeah, well i changed the configuration to a BTB sawn off shape (which is what it was origionally but then i changed it, but i prefer the sawn off shape 8) ) and i'm sure i can find something to shoot at, i was thinking a melon or something with a 12g co2.....