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Posted: Mon Aug 01, 2011 11:16 am
by Gun Freak
Still more complex than my original idea :lol:

Posted: Mon Aug 01, 2011 12:34 pm
by Lockednloaded
Haha just put a barrel port on jsr's design and you've got yourself an engine with a built in pneumatic machine gun :lol: Maybe you could build a pneumatic tank!

Posted: Mon Aug 01, 2011 1:43 pm
by POLAND_SPUD
OMG just get an air cylinder and hook it up to a 3 way valve
(or a double acting cylinder & 5 way valve)


If you're uberambitious then convert a 2 stroke chainsaw engine to LPG or something like that :D

Posted: Mon Aug 01, 2011 2:25 pm
by ramses
I still say that a hammer valve would be infinitely better. (barring rotary valves of course). :D

Posted: Mon Aug 01, 2011 2:38 pm
by Gun Freak
Haha just put a barrel port on jsr's design and you've got yourself an engine with a built in pneumatic machine gun Maybe you could build a pneumatic tank!
That would be sick :D

Poland, a cylinder and a three way would be expensive!

Posted: Mon Aug 01, 2011 6:57 pm
by POLAND_SPUD
Poland, a cylinder and a three way would be expensive
Cheaper than a custom machined compressed air engine. If you're such a cheap skate then get a ready made one from some air powered tool

Posted: Mon Aug 01, 2011 7:01 pm
by Gun Freak
I'm not custom machining one, I'm using brass tubing from the hardware store that is like 2 dollars a stick.

Posted: Tue Aug 02, 2011 5:05 am
by jackssmirkingrevenge
I've said it for a long time, such a motor with high pressure and a narrow cylinder to prevent pressure loss coupled with a set of rotating barrels driven by the crank and fed by the motor exhaust = self powered pneumatic gatling :D

Posted: Sun Aug 14, 2011 3:00 pm
by jackssmirkingrevenge
Made an an animation ;)

Image

Posted: Sun Aug 14, 2011 6:16 pm
by Gun Freak
I couldn't help but laugh while watching it :D

Posted: Sun Aug 14, 2011 6:40 pm
by Insomniac
JSR, how would a narrow cylinder prevent pressure loss? Unless, you have an enlarged area above the cylinder to increase the air used per stroke, a narrower cylinder is going to start with less air than a wider one, and result in the same pressure loss...

Posted: Sun Aug 14, 2011 7:46 pm
by jackssmirkingrevenge
Insomniac wrote:JSR, how would a narrow cylinder prevent pressure loss? Unless, you have an enlarged area above the cylinder to increase the air used per stroke, a narrower cylinder is going to start with less air than a wider one, and result in the same pressure loss...
Fair point, what we need to reduce pressure loss is a separate reservoir...

Posted: Sun Aug 14, 2011 7:55 pm
by POLAND_SPUD
not bad but you'd still need a starting motor or some sort of mechanism that does that

Posted: Sun Aug 14, 2011 7:58 pm
by saefroch
POLAND_SPUD wrote:not bad but you'd still need a starting motor or some sort of mechanism that does that
A hand?

Posted: Sun Aug 14, 2011 8:03 pm
by jackssmirkingrevenge
saefroch wrote:A hand?
How about shouting "contact!" and giving the barrels a spin :D

Image