By continuing to use this site, you agree to our use of cookies. Find out more
Forum sponsored by:
Forum sponsored by Forum House Ad Zone

Using compressed air

All Topics | Latest Posts

Search for:  in Thread Title in  
Michael Foden15/02/2015 21:08:47
24 forum posts

I want to run a Stuart S50 on compressed air, but only want a small, quiet compressor, as it will be kept in the house. It will be run at very low speeds, & with no load.

If the engine runs freely when turned by hand, will an aquarium pump give sufficient power, - there is a full Stuart Beam on youTube being operated by this method.

If so, what power of compressor will I need to give 10-20 PSI, as aquarium pumps are rated in litres per hour ?

Any help will be appreciated.

Mike.

steamdave15/02/2015 22:42:38
526 forum posts
45 photos

Although more expensive than an aquarium pump, I believe you will get more satisfaction from an airbrush compressor. Certainly a more versatile appliance (unless you have an aquarium!)

Lidl and Aldi have them for sale from time to time if you can wait. Otherwise have a look at eBay 131015709681. If you see this in time, 131425392878 looks like good value.

Dave
The Emerald Isle

jason udall15/02/2015 22:51:00
2032 forum posts
41 photos
Hi mike.

Don't know the s50

But this might lead you to a ballpark figure.
.
Area of piston x stroke of piston...x 1( or 2 if double acting) x pressure ( in bar)..
Will be the volume of air per stroke..
Multiply by rpm will give the volume per minute.
..


Area in case you didn't know..diameter of bore D

A= pi (D*D/4)
If you measure D in mm and stroke in mm
The volume per stroke will be cubic mm..to get that in litre..divide by 1 million..

Eg 20 mm bore 20 mm stroke double acting 30 rpm at one bar( 15 psi)
3.142*(20*20/4)mmsquare
* 20mm
*2 acting /1000, 000
*1 bar
*30 rpm..
*60 minutes

Or about 22 l/hr

Edited By jason udall on 15/02/2015 22:52:46

fizzy16/02/2015 00:11:51
avatar
1860 forum posts
121 photos

it would have to be the best engineered Item to run on that pump...highly unlikely

JasonB16/02/2015 07:31:39
avatar
25215 forum posts
3105 photos
1 articles

As the average aquarium is only two feet deep these pumps are not intended to run at any great head of pressure, you will find they run out of air as soon as any great head load is added and won't work at much over 5ft depth, koi pond pumps go deeper. Given that 3ft is approx 0.1 bar then 5-6ft is 0.2 bar or 3psi.

As dave says a small airbrush compressor will be more use but watch the cheap ones as they can be very noisy.

Michael Gilligan16/02/2015 08:30:20
avatar
23121 forum posts
1360 photos

It might be a good time to revive this earlier thread.

MichaelG.

Gordon W16/02/2015 09:22:17
2011 forum posts

My wifes car came with a tin of glue and a tyre pump, these have been replaced by a proper spare wheel. Yesterday I was playing about with the pump and it seems this could be a useful w/shop tool. Runs of 12v DC ,up to about 50psi. A small air tank and a pressure switch makes a good little tool.

Paul Lousick16/02/2015 09:46:42
2276 forum posts
801 photos

Michael,

How do you add a link to a previous thread ?

Paul

Michael Gilligan16/02/2015 09:53:10
avatar
23121 forum posts
1360 photos
Posted by Paul Lousick on 16/02/2015 09:46:42:

How do you add a link to a previous thread ?

..

Paul,

It's a bit laborious: Find the old thread, select its URL, then add it as a link like any other.

MichaelG.

Ian S C16/02/2015 11:10:39
avatar
7468 forum posts
230 photos

I tried a portable 12v tire compressor on a Stuart Turner S9, 1.5 " bore x 1.5" stroke double acting, no go, the volume per minute not enough, maybe with a tank the motor would run. This is a some what bigger motor than the 10V, but these little compressors are noisy wee beasts.

Ian S C

Bob Brown 116/02/2015 13:13:33
avatar
1022 forum posts
127 photos

Find an old fridge and remove the compressor/motor and use that, not very environmentally friendly if it is still gassed up but they can be purchased on that well know auction site. Add a small receiver and it should be a low cost option.

Bob

Ian S C17/02/2015 11:38:39
avatar
7468 forum posts
230 photos

If you are careful with the mounting of the frig compressor, it should be quite quiet, use rubber isolating blocks, and don't let vibrating metal parts touch the frame.

Ian S C

Ian S C20/02/2015 12:52:53
avatar
7468 forum posts
230 photos

Watch out for condensation in the cylinder(specially cast iron), when using air

Ian S C

Paul Lousick21/02/2015 06:05:00
2276 forum posts
801 photos

Hi Michael,

Running small engines on air was also discussed in a thread called "Air compressers for steam engines"

In which I said that I saw some small engines running on a steam cleaner. Very quiet and real steam.

Paul.

steam cleaner.jpg

Neil Wyatt21/02/2015 09:48:24
avatar
19226 forum posts
749 photos
86 articles

I keep thinking of using a wallpaper stripper. I have an old one with a radiator cap as a 'safety valve'.

Neil

roteiro roteiro22/02/2015 18:23:38
1 forum posts

I just got an airbrush compressor from there. It is a really nice option, as for me. Maybe, it will work for you

All Topics | Latest Posts

Please login to post a reply.

Magazine Locator

Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!

Find Model Engineer & Model Engineers' Workshop

Sign up to our Newsletter

Sign up to our newsletter and get a free digital issue.

You can unsubscribe at anytime. View our privacy policy at www.mortons.co.uk/privacy

Latest Forum Posts
Support Our Partners
cowells
Sarik
MERIDIENNE EXHIBITIONS LTD
Subscription Offer

Latest "For Sale" Ads
Latest "Wanted" Ads
Get In Touch!

Do you want to contact the Model Engineer and Model Engineers' Workshop team?

You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.

Click THIS LINK for full contact details.

For subscription issues please see THIS LINK.

Digital Back Issues

Social Media online

'Like' us on Facebook
Follow us on Facebook

Follow us on Twitter
 Twitter Logo

Pin us on Pinterest

 

Donate

donate