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steam engine with 40 mm bore

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Michael S.:
I also suspect the "A" stand is intended for a marine steam engine. Just as intended for the two-cylinder machine. For the stationary variant, the extension is an emergency solution.
In the blueprint for the single-cylinder machine, the description at the top also says "ship steam engine"!? But that fits better with two-cylinder machines. But there is no blueprint for this. But the "A" stand is the same and perhaps the one-sided step on the stand is intended for a shaft of rotation reversal. An oil pump could be mounted on it for the single-cylinder machine. I will do that there. I think the original design plan was the marine steam engine.

Michael

Jasonb:
Certainly an unusual base if it was intended for use in a ship as the propshaft would be very high and the spoked flywheel is not right either.

I suspect that they may have originally done it as one for a boat and then just used the same castings for this model, they would better suit a base like I have shown below. Having said that I had not seen the style beforeI remembered the model "Anna" does actually have a short A frame much like yours http://www.ateliermb.ch/shops/gussteile/ch/contents/de/d37.html

Yes I think that block on the leg would have been used to mount a pivot for a shaft that activated reversing valve gear at each end of the engine, a boiler feed pump would have been a more usual fitment for use in a boat than a mechanical oiler.

Michael S.:
Yes, a feed pump is also possible.
Nice that you found the website of the Swiss manufacturer of these machines. I've seen the smaller model in bronze at an exhibition before. I didn't know there were cast parts for it. On the website they write that the model was built after a German model. This machine was also available from Max Dörfel in a different version with a bore of about 25 mm.
Thanks for the hint.
Since the machine will definitely be operated with steam when it is finished, I am thinking about a feed pump.

Michael

Michael S.:
The first thing I did was the crankshaft bearings. The lower parts were milled in parallel and brought to the same length. The caps were also milled and soldered with soft solder.
The hole for the bronze bearings was then drilled in the milling machine.
The outer contours were machined on the lathe.
The rest was again a job for the file.
I am very satisfied and am waiting for material for the crankshaft and bronze for the bearings. Then I can align and attach both bearings to the base.

Greetings Michael

crueby:
Great progress!    :popcorn: :popcorn:

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