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Hello Chris,For someone who considers himself a 'dyed in the wool' I/C engine guy, I find this Battleship Ohio Engine blog to be fascinating reading; and your 3D CAD drawings to be both a technology revelation and also beautiful to look at.I see from your latest CAD drawing that Ohio's crankshaft throws were arranged to be in multiples of 90 degrees to each other. You explained the modular construction of the crankshaft and base (bed) plates earlier; so the 90 degree interval is quite logical.In exploring other four cylinder triple expansion engines' I came across this Titanic website http://www.titanicology.com/Titanica/TitanicsPrimeMover.htm which also made for some fascinating reading. It is interesting to note not only the different location of the two LP cylinders, but a completely different timing intervals for the four cylinders. This diagram explains the Titanic's arrangement far better than I can.I guess reduced vibration for passenger comfort was considered more important than ease of construction, or component interchangeability to simplify through life repair and maintenance in the Navy Yards.Mike
Great progress Chris! I'm looking forward to learning what a Lovekin assist valve is. I tried googling it and didn't come up with anything meaningful. I'm hear to learn! Kim
Hi "C" interesting parts to make that you only get to model when you copy a prototype !! and all these extra parts can be included in the brass label plate ... so good to see the progress Willy
the other interesting thing that is definitely a part of BIG engines, the HP valve ports have stay bolts....which if you think about it for a moment, and remember that its running at 250 psi ( locomotive pressures) makes absolutely perfect sense....but it had me baffled as I looked at the prints at first....When I asked my Friend John Mathiews who had a British Unlimited license, he rubbed his chin and said. Probably stay bolts!....and the light dawned.....you have to remember the size of these things...they're enormous!Dave