First mini lathe project, oscillating steam engine.

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Stilldrillin:
Is there a garage nearby, with air for tyres Ross? :scratch:

Or, borrow Dad's spare tyre.
Take the hose and valve connector from his old footpump, and adapt as an air reservoir.......

Doesn't Dad have one of those electric, tyre/ airbed inflators?

Handy things, Dads. Often! :D

Good luck, with engine, holiday, and job, Mate........ :thumbup:

Defor.

NickG:
Ross,

Out of interest, have you tried connecting the steam to the other port and running in the opposite direction? It may be better one way than the other and because you've made 2 air connectors you have that luxury!

Also, your ports looks slightly different heights, you may need to elongate the port hole on the cylinder slightly up and/or down so they line up properly with the holes in the stand.

I've just skimmed back through your posts and a have a couple more questions - have you lapped the port faces of both cylinder and stand? If not, it's definitely worth doing.

Why did you only drill the air adaptors 2mm when the port dia. in the cylinder is 1/8" - more than 3mm? This will be restrictive as well as potentially causing a timing issue - don't think it will do the latter in this case but it's certainly better to have them matched.

Hope this helps.

Nick

mzt:

--- Quote from: Ross on June 08, 2012, 12:58:08 PM ---one thing I need a bit of advice on I'd the best way to secure the flywheel to the crankshaft.

--- End quote ---

I see I'm coming late to this, anyway this is an idea I like a lot:

http://www.homemodelenginemachinist.com/index.php?topic=11471.msg125602#msg125602

It's easier to make when shafts are bigger, but worked also on the 6mm shaft of my #29.

Marcello

Ross:

--- Quote from: NickG on June 22, 2012, 09:33:43 AM ---Ross,

Out of interest, have you tried connecting the steam to the other port and running in the opposite direction? It may be better one way than the other and because you've made 2 air connectors you have that luxury!

Also, your ports looks slightly different heights, you may need to elongate the port hole on the cylinder slightly up and/or down so they line up properly with the holes in the stand.

I've just skimmed back through your posts and a have a couple more questions - have you lapped the port faces of both cylinder and stand? If not, it's definitely worth doing.

Why did you only drill the air adaptors 2mm when the port dia. in the cylinder is 1/8" - more than 3mm? This will be restrictive as well as potentially causing a timing issue - don't think it will do the latter in this case but it's certainly better to have them matched.

Hope this helps.

Nick

--- End quote ---

Hi Nick,

I haven't tried switching the ports, Something I'll try soon.

The ports being a different height Is a mistake I made, one of the ports is drilled diagonalu as I didn't endure the workpiece was flat in the vice. Where the hole meets the cylinder it lines up fine. If that makes sense.

I have not lapped the faces, something to try it is pretty free running part from the tight spot.

And that point s something I never thought of at the time, the port holes on the stad were drilled to 2mm as that was the I/D of the 1/8 pipe. Something to think about next time.

Ross:
Also, just an update to those wondering. I've made an air raptor to fit onto the regulator and tried it with one of those electric car tyre pumps, it just hasn't got the lungs to sustain the pressure.

Can anyone recommend a mediumly priced small tanked compressor? I've been meaning to get one for ages and now seems the time.

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