Potty Vertical Cross Single

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sbwhart:
Herr's wishing you a happy a prosperous new year.

Got a few more parts made, the swing arms took a little creative thinking I want this engine to be within the capabilities of a Newbie with a modestly equipped shop, the holes in the swing arms need to be symmetrical with them selves and with each other, I started off by first centre drilling a pip on the end of each arm I then marked them out to give a guide as to where to cut away the meat,

I then drilled the centre 4mm hole, then pinned the two arms together with a 4mm dowel I then drilled one 3mm hole all the way through both arms, I then swivelled the top arm 180 deg and used it as a guide to drill the second hole in the bottom arm, flip them over and do the same to the other arm this way they must have the same centre distance and be symmetrical to each other.

Then into the four jaw and supported on the centre chew away the unwanted bits, then cut off the pip and finish off to shape with filing buttons.

This is how its looking

Stew

sbwhart:
Time for a bit of an update

I fabricated the fly wheel from a bit of 41/2" welded tube a length of 1" bar drilled and formed into a circle with slip rolls a hub and some spokes

Also more or less got all the work done on the cylinder

And the crank and eccentric

Just got the base and the top to do.

Stew

Chuck in E. TN:
Looking good, Stew. Nice work. I like the flywheel.
Chuck

Doc:
Nice that is a beautiful flywheel very nice!
And that valve stem support I LIKE it is looking like a cast piece, nice work.

billmac:
Congratulations on your progress. The flywheel looks very good; the proportions are very reminiscent of the original. (http://www.nmes.org/) That flywheel is about 14 feet diameter and its 'presence' makes itself felt if you stand under it with the engine running.

You may have noticed the two black marks running around the outside of the flywheel. They are nothing to do with the original design, but a side-effect of the motor drive we use to turn the engine when not using steam. They are the rubber from a pair of car tyres that drive the flywheel.

The original engine looks to me like a collection of clever ideas all put together in one machine. There is the parallel linkage (an interesting job to erect in the original engine!), the Mercury cups liked to the governer linkage, the Lumb trip etc. etc.

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