6/21/06
Restoration of the Hubbard Steam-Powered Motorcycle
Page 2
As requested, I am including another page showing closeup photos of the steam engine, both interior and exterior.
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Steam Power Restoration 6/21/06 Restoration of the Hubbard Steam-Powered Motorcycle Page 2 As requested, I am including another page showing closeup photos of the steam engine, both interior and exterior. |
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| ABOVE: The triple-coiled tubular steel flash boiler is just visible mounted down low below the engine. |
ABOVE: A closeup of the 44 pound handmade powerplant. This is the left side with most of the feedwater handling components. |
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| ABOVE: Right side of the powerplant with most of the fuel handling components. The cylindrical tank at the 6 o'clock position is the boiler feedwater preheater. This employs exhaust steam to preheat feedwater. |
ABOVE: The left side of the engine with the crankcase cover removed. Note the eccentric for the feedwater pump piston. Also, shown is the lubricating oil pump. |
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| ABOVE: The open crankcase from the back of the engine. The topmost shaft has the water and fuel pump drive cams in addition to the steam cutoff lever. The midshaft has the inlet and exhaust valve cams. At the bottom is the crankshaft. |
ABOVE: A closeup of the steam cut-off mechanism. The brass steam cut-off lever and cut-off cams slide in unison on their respective shafts. The inlet cams are ramped so depending on where the slide mechanism is located, steam is cut off earlier or later. Cut-offs of 0.2 to 0.8 of full open are possible. |
