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Hit & Miss Gas Engine Discussion Meet collectors of hit and miss engines, ask questions about collecting, restoring and showing antique flywheel engines.

Hit & Miss Gas Engine Discussion

St Lawrence 3cyl, new crankshaft


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  #21  
Old 03-22-2013, 04:37:34 AM
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PaulGray PaulGray is offline
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Default Re: St Lawrence 3cyl, new crankshaft

Damn, that is impressive work, JB ! When I saw the first few pix, I was scratching my head as to how you were going to pull that one off... Certainly one of the best posts on the Stack in a long time. Bravo Sir.
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  #22  
Old 03-22-2013, 10:36:39 PM
J.B. Castagnos J.B. Castagnos is offline
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Default Re: St Lawrence 3cyl, new crankshaft

Thanks Paul, hope to see you at Calvert.
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  #23  
Old 03-25-2013, 06:41:33 PM
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Brian Triebner Brian Triebner is offline
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Default Re: St Lawrence 3cyl, new crankshaft

I found these pictures in our albums from England. While we were at the Anson Museum Geoff showed us this massive crank. He explained the same process was used of hot forging the throws together then heat up again to twist throws to suit.

Brian
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Old 09-23-2015, 08:36:59 AM
Peter Short Peter Short is offline
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Default Re: St Lawrence 3cyl, new crankshaft

J.B.

Thanks for the crankshaft-making posts, including your recent two cylinder job, very interesting.

FYI, here is a photo showing a large crank being twisted at the English Steel Corp, Sheffield, probably in the 1950's.
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Old 09-23-2015, 09:02:51 AM
Peter Short Peter Short is offline
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Default Re: St Lawrence 3cyl, new crankshaft

Here is another example of forged, twisted and machined crankshafts, they are three-throw water pumps built in 1879 by Easton Anderson and are most impressive not to mention mind-boggling, pieces.

This photo comes from The Steam Engine in Industry volume 1 by George Watkins and shows the well and surface force-pumps at Southampton Waterorks, Timsbury Station, England.

Quote: The crankshafts were splendid examples of smith's work, in wrought iron 9in diameter machined only for the pump rod bearings, which had a collar forged on either side of the brasses.
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Old 09-23-2015, 09:35:05 AM
wmusta wmusta is offline
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Default Re: St Lawrence 3cyl, new crankshaft

How are your twists oriented in relationship to crank rotation? Example would be "does power stroke fire with the direction of your twist or against the twist?"
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Old 09-23-2015, 11:06:20 AM
J.B. Castagnos J.B. Castagnos is offline
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Default Re: St Lawrence 3cyl, new crankshaft

I didn't try for a particular direction, the engine is a reversible two cycle and can run either way.
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