The Steamboating Forum

Thanks for keeping us updated Bart.
Like others, I escaped school and entered the University of Life, and learned the math I had to. Your planning and design skills impress me.

I spent another weekend in the shop - Barbe (my wife) is very understanding. Worked on the engine base. Still getting the hang of the 3" face mill; ran it too fast and will be indexing the carbine inserts :). The DRO saves a lot of time. - Bart I'm glad to see you are back at it, Bart. Now the...

Movin' along slowly, but making progress with boiler, so before going any farther along decided to check welds. Hydrolocked boiler and connected it to shop air and ran it up slowly; maxed out compressor 130ish psi. Damn, I guess I'm better at welding than I thought; NO leaks. So next step will be t...

Your link doesn't lead to anything in the US. - Bart How very odd. I've never heard of that....they must be watching you guys. Seimens is a huge multinational with one of those world maps to click on where you are to get the site in your language. Main website is siemens.com/entry/cc/en/ OK I found...

Hey Bart, not a math question.... I noticed that somewhere back you mentioned a con rod big end of a 50mm x 90mm . I see that is .0314 smaller that the 2 inch crank. I think you could heat and shrink and install it on the crank journal, but I am wondering if the expansion of the bearing once the pi...

Hey Bart, not a math question.... I noticed that somewhere back you mentioned a con rod big end of a 50mm x 90mm . I see that is .0314 smaller that the 2 inch crank. I think you could heat and shrink and install it on the crank journal, but I am wondering if the expansion of the bearing once the pin...

As I am away from my shop wintering in Mexico, I thought I would teach myself CAD. I have a Plasmacam and have some design knowledge from that and use it for most design work in the shop. It is easy to use and difficult to annotate and print. So I bought a copy of DeltaCAD and tried to learn it. Aft...

Bart Some where past you mentioned the load on the mains as 2600lb That got me thinking, and as I escaped school at grade 10 and went to the U of Life, I don't have your math strength. I did some pathetic figuring with Piston area(25.96 sq in) X Mean pressure 180psi(4635) X Stroke (.48ft) =2224.8Ft ...

I think that would not be much ofa sine wave as the tops of the eccentrics would be only 30 degrees apart, but it was a way to shift from using the 11 degree BTDC eccentric to the 19ATDC eccentric without interruption. Your idea of a cam at right angles to the crank plane will drop off a pile of wei...

Hey Bart, In a previous thread you discussed cams and timing in your Sea Lion engine: With a fixed valve duration of about 30 degrees, short cut-off is achieved by advancing the valve timing to 11 degrees before TDC; this is about 2% of the stroke. The remaining 19 degrees is all admission time, yie...