Towards Building a Steam Powered Outboard Motor

A special section just for steam engines and boilers, as without these you may as well fit a sail.
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fredrosse
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Re: Towards Building a Steam Powered Outboard Motor

Post by fredrosse » Sat Nov 26, 2022 8:52 pm

The crankcase for the uniflow engine is from a Wisconsin AEN gasoline engine. This engine is somewhat unusual because the air cooled cylinder is detachable from the crankcase. Yes, the flywheel is from the original engine, I will machine off the blower fins when I get a round tuit.
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Re: Towards Building a Steam Powered Outboard Motor

Post by Elver1 » Sat Nov 26, 2022 9:34 pm

Ah, Fred Rosse, removable cylinder makes perfect sense for the conversion!

I was able to work on my lathe today. I bored the cylinder a couple thousandths under an inch so I could lap it later.

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Re: Towards Building a Steam Powered Outboard Motor

Post by Elver1 » Sat Nov 26, 2022 9:53 pm

Then I turned the cylinder top flange and the exhaust manifold recess. A ring will fit over the flange and seat in the groove at the bottom to form the manifold chamber.

The head will trap the top of the ring and the flange, which will be flush with each other.

I'll have to mill ports into the cylinder at the base of the chamber. Not sure how much percentage of the stroke they should be in height.....

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Re: Towards Building a Steam Powered Outboard Motor

Post by Elver1 » Wed Nov 30, 2022 3:02 am

The crankspace bored out:

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Re: Towards Building a Steam Powered Outboard Motor

Post by Elver1 » Fri Dec 02, 2022 1:29 am

A new pattern for the front plate and bearing housing:

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Re: Towards Building a Steam Powered Outboard Motor

Post by Elver1 » Fri Dec 02, 2022 1:31 am

As cast:

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Re: Towards Building a Steam Powered Outboard Motor

Post by Elver1 » Fri Dec 02, 2022 1:33 am

Cleaning up:

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Re: Towards Building a Steam Powered Outboard Motor

Post by Elver1 » Fri Dec 02, 2022 1:37 am

The casting roughed out. A register will be cut on the back, and then the plate thinned and the shaft and bearing spaces bored out. A valve boss will be added by brazing, and then the plate will be trimmed to fit the crankcase. Finally the excess length of the casting which serves as a chucking extension will be trimmed to final length.

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Re: Towards Building a Steam Powered Outboard Motor

Post by Elver1 » Sun Dec 04, 2022 3:44 am

Operations performed earlier: turning the back face flat:

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Last edited by Elver1 on Sun Dec 04, 2022 3:46 am, edited 1 time in total.
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Re: Towards Building a Steam Powered Outboard Motor

Post by Elver1 » Sun Dec 04, 2022 3:45 am

Squaring the edges in the mill:

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