Login    Register
User Information
Username:
Password:
We are a free and open
community, all are welcome.
Click here to Register
Sponsored
Who is online

In total there are 78 users online :: 5 registered, 0 hidden and 73 guests


Most users ever online was 218 on Wed Dec 07, 2016 6:58 pm

Registered users: Bing [Bot], Exabot [Bot], Google [Bot], MSNbot Media, Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

air engine

All non-spudgun related discussion goes here such as projects, theories, serious questions, etc. All "off-topic" posts (aka useless posting, determined by moderators) will be removed.
Sponsored 
  • Author
    Message

air engine

Unread postAuthor: qwert123 » Sun Mar 25, 2012 8:51 pm

i built an air engine out of parts i simply had laying around :D this thing was so easy to make and is quite fun to play with, I've finalized the design since i made the video, and its much more efficient and has a lot higher rpm than it does in this video. i am more than happy to answer any questions about this. please ask them if you have any. i have several parts in the mail and I'm building a much more efficient one from scratch, i highly recommend building one if these simply for fun if you have the parts laying around. air engines are incredibly fun.

[youtube]http://www.youtube.com/watch?v=5O1cw-p8jsM[/youtube]
  • 0


qwert123
Corporal
Corporal
 
Posts: 63
Joined: Thu Oct 21, 2010 9:41 pm
Reputation: 0

Unread postAuthor: killerbanjo » Sun Mar 25, 2012 9:01 pm

Nice, always wanted to compressed air bike :D
  • 0

User avatar
killerbanjo
2nd Lieutenant
2nd Lieutenant
 
Posts: 245
Joined: Fri Jun 18, 2010 6:56 pm
Reputation: 0

Unread postAuthor: qwert123 » Sun Mar 25, 2012 9:07 pm

lol, you would need one big tank, at least with this design, it is so incredibly inefficient. it went thru an entire 5 gallon tank (the tank was at 120pis i regulated it to 20) in the little time i ran it :D
  • 0


qwert123
Corporal
Corporal
 
Posts: 63
Joined: Thu Oct 21, 2010 9:41 pm
Reputation: 0

Unread postAuthor: turner » Sun Mar 25, 2012 10:06 pm

Mabe if you had a solenoid it would be more efficient. i've seen a video were someone hooked up a sprinkler valve to have it timed right.
  • 0


turner
Staff Sergeant
Staff Sergeant
 
Posts: 113
Joined: Fri Aug 07, 2009 11:48 pm
Reputation: 0

Unread postAuthor: qwert123 » Sun Mar 25, 2012 10:23 pm

Yeah there is like 15 videos of ones like that floating around. I'll be sure to post an update for what I change on it. I see no point in having an electric solenoid valve, so I'm going to use a lever actuated valve and a cam on the output shaft. No electricity, no wires. Also reed swithches deteriorate rather fast, I'm trying to keep it simple. Anyway This is just to play with untill my double action cylander, bearing blocks, and various bits and pieces get here. Unfortunately where I am located it takes ages to get parts.
  • 0


qwert123
Corporal
Corporal
 
Posts: 63
Joined: Thu Oct 21, 2010 9:41 pm
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Sun Mar 25, 2012 11:35 pm

Very nice :) but without a shut off valve the piston is fighting the air on the upward stroke, it only works with low flow and a heavy flywheel.

It would be extremely easy to make, just a pin on top of the cylinder and a check valve:

http://www.animatedengines.com/co2.html
  • 0

User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 24225
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 66

Unread postAuthor: inonickname » Sun Mar 25, 2012 11:41 pm

Don't bother with a cam and lever actuated valve, simply add a hammer valve inside the hose barb that's opened when the piston presses on it at the top of the stroke. Good work
  • 0

PimpAssasinG wrote:no im strong but you are a fat gay mother sucker that gets raped by black man for fun
User avatar
inonickname
Lieutenant General
Lieutenant General
 
Posts: 2606
Joined: Sun Dec 07, 2008 3:27 am
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: SpudFarm » Mon Mar 26, 2012 9:01 am

Pretty impressive, looks like lots of fun and with co2 it does have some power potential. Could have a small compressor charging the exhaust gas back into the tank. Atleast some of it.
Someone should machine out a cylinder and piston with large diameter and a shallow stroke.
  • 0

"Made in France"
- A spud gun insurance.
User avatar
SpudFarm
Donating Member
Donating Member
 
Posts: 2563
Joined: Sat Nov 04, 2006 9:39 am
Location: Norway Trondheim area
Reputation: 0

Unread postAuthor: inonickname » Mon Mar 26, 2012 9:37 am

SpudFarm wrote:Pretty impressive, looks like lots of fun and with co2 it does have some power potential. Could have a small compressor charging the exhaust gas back into the tank. Atleast some of it.
Someone should machine out a cylinder and piston with large diameter and a shallow stroke.


I think you'd want absolutely minimal back pressure from your exhaust port, especially on this design that doesn't have an actual valve.
  • 0

PimpAssasinG wrote:no im strong but you are a fat gay mother sucker that gets raped by black man for fun
User avatar
inonickname
Lieutenant General
Lieutenant General
 
Posts: 2606
Joined: Sun Dec 07, 2008 3:27 am
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Mon Mar 26, 2012 9:58 am

inonickname wrote:I think you'd want absolutely minimal back pressure from your exhaust port, especially on this design that doesn't have an actual valve.


Ideally you'd have a multiple expansion design where the exhaust then feeds a larger diameter piston which compensates for the lower pressure by having a larger area.

Image
  • 0

User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 24225
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 66

Unread postAuthor: al-xg » Mon Mar 26, 2012 12:15 pm

MDI are making an air motor which they claim is pretty efficient. They're actually serious about a compressed air car. Sounded like a bit of a silly idea to me but it seems are actually getting real interest and will be going into production.
Same as above it relies on a small isobaric expansion chamber before the larger cylinder.

Image
"DOUBLE DUTY: The AirPod’s engine uses two linked cylinders. Compressed air flows into the smaller cylinder first at a constant pressure of 20 bars [1]. When the smaller piston bottoms out, the intake is closed, and the air in the small cylinder expands, flowing into the larger cylinder [2 and 3]. Both pistons then move to exhaust the expanded air [4], and the cycle begins again. Click on image for a larger view."
  • 0

User avatar
al-xg
Colonel
Colonel
 
Posts: 643
Joined: Fri Jan 19, 2007 12:29 pm
Reputation: 0

Unread postAuthor: Brian the brain » Mon Mar 26, 2012 1:02 pm

I've seen guys modify a 4 stroke gasoline engine into what is basically a 1 stroke pneumatic engine.
Those seemed much more efficient.


Great work nevertheless.
Loved it!
Thanks for sharing!
  • 0

Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Can't ask for a better compliment!!
User avatar
Brian the brain
Moderator
Moderator
 
Posts: 3494
Joined: Mon Dec 05, 2005 2:06 am
Location: Holland
Country: Netherlands (nl)
Reputation: 29

Unread postAuthor: SpudFarm » Mon Mar 26, 2012 1:38 pm

I think you'd want absolutely minimal back pressure from your exhaust port, especially on this design that doesn't have an actual valve.

You wouldn`t get any. If you run the exhausted gas through a exhaust pipe and then have the compressor charge from a tee fitting on that pipe. This way there is no more back pressure on the exhaust port on the engine and you could reuse some of the gas.
Would actually lower the back pressure.
  • 0

"Made in France"
- A spud gun insurance.
User avatar
SpudFarm
Donating Member
Donating Member
 
Posts: 2563
Joined: Sat Nov 04, 2006 9:39 am
Location: Norway Trondheim area
Reputation: 0

Unread postAuthor: qwert123 » Mon Mar 26, 2012 8:50 pm

jackssmirkingrevenge wrote:Very nice :) but without a shut off valve the piston is fighting the air on the upward stroke, it only works with low flow and a heavy flywheel.

It would be extremely easy to make, just a pin on top of the cylinder and a check valve:

http://www.animatedengines.com/co2.html


exactly, i was going to build one like that, simply a nail cut to the proper length and a decent sized check valve, but the check valve i needed was $25 and i couldn't justify spending that much on parts considering i have all the parts in the mail for one that will waste hardly anything. it will be better than that due to the fact it isn't made out of a broken leaf blower :roll: i wish the mail didn't take so long :(
  • 0


qwert123
Corporal
Corporal
 
Posts: 63
Joined: Thu Oct 21, 2010 9:41 pm
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Mon Mar 26, 2012 11:46 pm

Your check valve could simply be an airsoft BB in the hose barb that has been appropriately drilled out, twentyfive bucks shmentyfive bucks ;)
  • 0

Attachments
cheap simple check valve.PNG
cheap simple check valve.PNG (13.48 KiB) Viewed 771 times
User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 24225
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 66

Next

Return to Non-Spudgun Related Discussion

Who is online

Registered users: Bing [Bot], Exabot [Bot], Google [Bot], MSNbot Media, Yahoo [Bot]

Reputation System ©'