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Another 'must have' - thanks Chuck.

Any place that sells potter's supplies should carry castable refractory, or be able to get it.

Gears are done, but I've had no luck getting to the spark plugs yet

Play it safe - write 'Exactly on centre height'!;)

Perhaps, but I don't wanna be in the same room with it. Strobing occurs occasionally with lathes lit by fluro strip lighting - we go to great lengths to get rid of it, not do the opposite.

Sounds like an easy way of losing a hand to me.

Or just use a clevis and pin - a ball joint sounds a bit of overkill for that application to me.

I don't think I'd go as low as a 15t gear for it - your best bet would probably be to try and work a 20/40 pair in. Or even a 19/38. In fact the 19/38 might work out very close in 40 dp

Interesting, I'll be watching this as well - and looking forward to seeing the plans!

Just to add to the mix - you can also regulate the valve cut-off on an air/steam engine with a flywheel governor.

Welcome Fluffy

Welcome Oldbugger.wEc1

Frankly, if the bore is good, other than the blowhole, I would be inclined to ignore it, especially if fitted with CI rings, even with soft packing you will get away with it more often than not.

It is better to avoid mixed marriages, yes, BUT in this instance 4BA works out just right, and they they are easily available. Besides which, BA (British Association) are a metric based bolt in any case.

4BA might be a better choice - easier, I think, than M3.5 for most of us to get hold of.

There are a number of ways of cutting gears on a lathe. All the above will work, or, popular among clock makers, is to use the lathe spindle to hold the blank, with some sort of indexing rig up, and have the cutter mounted in a sort of yoke - independently driven and fitted to a vertical slide...

There have been at least three builds described in these august pages. In my own case I just work around those sorts of problems as I find 'em - from memory I shifted the underside bolts outward in your problem #2 With problem#1 - the point is, in fact, on the part line, but the location is...

meanwhile, experimental plug #1, teflon insulator and stainless electrode. Might be next week before I can test it and move forward, town day tomorrow and heading down to Batemans for the weekend Fri.

Dunno yet Pete - with a little bugger like this a fuel vapor carb might be the best way.

Rof}Yeah, it's about the share I get out of my pension as well. Bushes are looking good! Yes Mike, most ME plans have errors and omissions - just needs your 'team' to be pretty well coordinated to get around it.