My Elmers Tiny wont work !

[Chris machinParticipant @chrismachin]

Hi All , just completed my Elmers Tiny , tried it and it won't work ! It is nice and free when wound round by hand but when i apply air (tried from 14 – 35 p.s.i.) the piston goes down but wont go back up. I thought it must be the air holes so i enlarged the cylinder hole to about 1.5mm and also the exhaust port to 1.5mm but it still wont work

Is there anything i can do or is it beyond help !

Chris.

[Chris machinParticipant @chrismachin]

[Chris machinParticipant @chrismachin]

Just a thought , when i tried it it didn't have the flywheel on the shaft , wondering if it needs this on for the momentum to carry the piston back up ?

Chris

[JasonBModerator @jasonb]

Needs the flywheel

J

[Chris machinParticipant @chrismachin]

Added the flywheel , a little grease on the crankshaft bearing , a bit more air and it runs sweetly – My first project so quite chuffed !

[Sub MandrelParticipant @submandrel]

Well done Chris,

Picture?

Neil

[Chris machinParticipant @chrismachin]

Will post a picture very soon. Just gonna give it a bit of polish and perhaps a small base of wood

[Ian S CParticipant @iansc]

Chris, try a light oil on it instead of grease, I think you'll find a few more revs, or be able to use even less pressure. I use a 3 Litre garden spray pump to test my little steam engines, they usually run on about 5 to 10 psi quite well. Ian S C

[Chris machinParticipant @chrismachin]

Hi , Yeh was a little worried about the wear as the column is brass as well as the cylinder. Also unless you dissasemble it every time you run it you can't really oil the piston can you. To be honest i've not even drilled the oiling hole in the column/crankshaft bush as i was so eager to run it ! However its run for about 1/2 hour after just a spot of oil and doesn't get warm at all so can't be too much wear going on………..can there ?

[JasonBModerator @jasonb]

If you squirt a drip or two of oil into the inlet pipework before you connect your air hose that will blow the oil through the engine and get it all lubed internally.

J

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