Compressed air engine

Meaningful discussion outside of the potato gun realm. Projects, theories, current events. Non-productive discussion will be locked.
User avatar
jor2daje
Specialist 4
Specialist 4
Posts: 418
Joined: Sun Oct 05, 2008 9:41 pm
Location: Southern California

Thu Jul 28, 2011 12:05 am

I've built a few air engines, I used a wobbler engine design you have a piston and cylinder assembly that pivots on a flat surface, the piston has a flat that essentially seals with this flat surface. The cylinder has one hole in it that let's air in and out, and the flat surface has two, one for intake and one for exhaust, as the crank rotates the cylinder pivots and lines up with each hole accordingly. For stirling engines you should look at marble displacer types, they are incredibly cool and I think much more interesting to watch. The only tricky parts are the graphite piston and the geared flywheel.

Image

Image

If you want I'll grab a picture or two of my marble displacer engine too.
Patience is a virtue, get it if you can, seldom in a women, never in a man.
User avatar
jackssmirkingrevenge
Five Star General
Five Star General
Posts: 25836
Joined: Thu Mar 15, 2007 11:28 pm
Has thanked: 157 times
Been thanked: 94 times

Donating Members

Thu Jul 28, 2011 4:41 am

jor2daje, I enquired in the lathe thread and I'll enquire again, any chance of seeing this little beauty running?
hectmarr wrote:You have to make many weapons, because this field is long and short life
User avatar
ramses
Staff Sergeant 2
Staff Sergeant 2
Posts: 1679
Joined: Thu May 29, 2008 6:50 pm

Thu Jul 28, 2011 8:04 am

POLAND_SPUD wrote:even if there was no link I'd know it's a bot because of female name :D
User avatar
jor2daje
Specialist 4
Specialist 4
Posts: 418
Joined: Sun Oct 05, 2008 9:41 pm
Location: Southern California

Thu Jul 28, 2011 9:59 am

Sorry jack must have missed that in the last thread
[youtube][/youtube]
Patience is a virtue, get it if you can, seldom in a women, never in a man.
User avatar
Gun Freak
Lieutenant 5
Lieutenant 5
Posts: 4971
Joined: Mon Jan 25, 2010 4:38 pm
Location: Florida
Been thanked: 7 times

Thu Jul 28, 2011 10:23 am

Beautiful engine, too bad I don't have a lathe :P
I've seen an engine like it but was made of wood. It is a good design. I think the type like I posted would be easier for me to construct, since I don't have a lathe or mill to make the flats. But I'm still deciding which to use.

For my stirling, I want to make an LTD and a candle one, but the marble displacer ones are interesting too. Makes a candle a bit more interesting :)
OG Anti-Hybrid
One man's trash is a true Spudder's treasure!
Golf Ball Cannon "Superna"M16 BBMGPengunHammer Valve Airsoft SniperHigh Pressure .22 Coax
Holy Shat!
User avatar
jackssmirkingrevenge
Five Star General
Five Star General
Posts: 25836
Joined: Thu Mar 15, 2007 11:28 pm
Has thanked: 157 times
Been thanked: 94 times

Donating Members

Thu Jul 28, 2011 10:30 am

jor2daje wrote:Sorry jack must have missed that in the last thread
No worries :)

Sexeh! and just 15 psi, nice :)
hectmarr wrote:You have to make many weapons, because this field is long and short life
User avatar
Gun Freak
Lieutenant 5
Lieutenant 5
Posts: 4971
Joined: Mon Jan 25, 2010 4:38 pm
Location: Florida
Been thanked: 7 times

Thu Jul 28, 2011 1:14 pm

Dang I need a Sherline :lol:
OG Anti-Hybrid
One man's trash is a true Spudder's treasure!
Golf Ball Cannon "Superna"M16 BBMGPengunHammer Valve Airsoft SniperHigh Pressure .22 Coax
Holy Shat!
User avatar
jrrdw
Moderator
Moderator
United States of America
Posts: 6531
Joined: Wed Nov 16, 2005 5:11 pm
Location: Maryland
Has thanked: 11 times
Been thanked: 3 times
Contact:

Donating Members

Thu Jul 28, 2011 5:21 pm

Here's one that I like.

[youtube][/youtube]
Look if you must.
User avatar
Gun Freak
Lieutenant 5
Lieutenant 5
Posts: 4971
Joined: Mon Jan 25, 2010 4:38 pm
Location: Florida
Been thanked: 7 times

Thu Jul 28, 2011 10:42 pm

Jrrdw I love that one! I just can't figure out how it works :(
OG Anti-Hybrid
One man's trash is a true Spudder's treasure!
Golf Ball Cannon "Superna"M16 BBMGPengunHammer Valve Airsoft SniperHigh Pressure .22 Coax
Holy Shat!
User avatar
jor2daje
Specialist 4
Specialist 4
Posts: 418
Joined: Sun Oct 05, 2008 9:41 pm
Location: Southern California

Fri Jul 29, 2011 12:06 am

It's the same principal as my engine, only with three cylinder assemblies.
Patience is a virtue, get it if you can, seldom in a women, never in a man.
User avatar
POLAND_SPUD
Captain
Captain
Posts: 5402
Joined: Sat Oct 13, 2007 4:43 pm
Been thanked: 1 time

Fri Jul 29, 2011 5:13 am

It's the same principal as my engine, only with three cylinder assemblies
I have to join the discussion to point out that the simplest air engine can be built with an air cylinder and a 3 way valve
:D

Though a 5 way valve would be even better
Children are the future

unless we stop them now
User avatar
jackssmirkingrevenge
Five Star General
Five Star General
Posts: 25836
Joined: Thu Mar 15, 2007 11:28 pm
Has thanked: 157 times
Been thanked: 94 times

Donating Members

Fri Jul 29, 2011 5:47 am

POLAND_SPUD wrote:I have to join the discussion to point out that the simplest air engine can be built with an air cylinder and a 3 way valve
Yep, cylinder connected to a crankshaft, at the end of the stroke hits the 3 way valve and the cylinder retracts etc, I can see it.
hectmarr wrote:You have to make many weapons, because this field is long and short life
User avatar
POLAND_SPUD
Captain
Captain
Posts: 5402
Joined: Sat Oct 13, 2007 4:43 pm
Been thanked: 1 time

Fri Jul 29, 2011 6:01 am

I can see it
ohh btw now that you have a lathe you can build your own DCV valve... get a block of aluminium, drill a hole all the way through it then 3 perpendicular holes for ports and finally turn a spool
Children are the future

unless we stop them now
User avatar
jackssmirkingrevenge
Five Star General
Five Star General
Posts: 25836
Joined: Thu Mar 15, 2007 11:28 pm
Has thanked: 157 times
Been thanked: 94 times

Donating Members

Fri Jul 29, 2011 6:42 am

POLAND_SPUD wrote:ohh btw now that you have a lathe you can build your own DCV valve...
I know, I know... but who needs it with a detent system? I have a 0.22" semi-auto on the drawing board with a blow-forward interrupter...
hectmarr wrote:You have to make many weapons, because this field is long and short life
User avatar
jrrdw
Moderator
Moderator
United States of America
Posts: 6531
Joined: Wed Nov 16, 2005 5:11 pm
Location: Maryland
Has thanked: 11 times
Been thanked: 3 times
Contact:

Donating Members

Fri Jul 29, 2011 2:06 pm

Gun Freak wrote:Jrrdw I love that one! I just can't figure out how it works :(
This will help you out if you haven't read it all ready.

Pneumatic Motor.
Look if you must.
Post Reply