I have an original 1960s Blackstaff steeple compound engine in my steamer.
I also got with it a set of photo copied partial(?) drawings.
If you are missing some I can compare with you and see if I have additional useful drawings.
RussN
Rnoe317@gmail.com

SWEET! I look forward to learning more.

It HAS been quiet on this discussion board. Maybe people out steaming?
It's raining here now, but I will try to get out one more time for new prop performance testing. Results will be posted here.
RussN

Finally (!!!) today I finished installing the new prop on Cluaran. This project only took 1 year from beginning searching for a classic prop casting, then finishing it, and finally fitting it. Had to R&R the shaft threads and make a new key. It all went disturbingly well. Next are more performance t...

That is good practical information to have!
RussN

Patience required.
The new prop fitting is delayed by cherry harvesting, plus arranging for a new roof (next week), a solar panel system, and more.
Such is life.
RussN

Old Steamer said: "I'm not sure how Kelly's perpendiculars function" I believe the vertical extensions from the top baffles act as additional barriers preventing the heat from quickly escaping the tube area. They force the heat around and through the tube bundles, providing opportunity for additiona...

Barry: My boiler burns steam atomized diesel oil, because kerosene is obscenely expensive by comparison. I only use propane gas during cold fire-up as mentioned above. My engine/boiler power plant is "mathematically rated" at about 2 h.p., and moves my 17ft long hull at 5 knots. Early calculations i...

Old Steamer: Looking at your Blackstaffe boiler design compared to my original boiler built in the 1960s by Cliff Blackstaffe, I see that your stack is mounted behind the steam dome. That implies gases moving from the original end-mounted oil burner(?) lengthwise through the circulation tubes, and t...

Bart: Agreed: The boat's present performance is nothing to dismiss. Thanks for your lesson on fitting shaft keys. I will pay attention. This is the first marine keyed shaft I have worked with, and there is always something to learn. And I suspect the previous owner was inexperienced, based on other ...

Progress report on replacing the old prop (15" x 21 pitch) with the newly completed one (16" x 24 pitch): We got the boat in the water on August 3 for baseline performance tests with the original propeller. No pictures though. I was too busy. Tested ground speed (using an iPhone GPS speed app) at 20...