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Could I try an IC engine?

What skills and equipment should I have?

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Paul Horth	16/02/2021 12:38:36
69 forum posts 18 photos	Hello again, The forum has helped me greatly with my questions about making the camshaft. I would now like to ask about the crankshaft for the two cylinder Seagull. Is there any objection to making a built up crankshaft instead of turning from the solid? It seems to me easier to make the two sets of webs and crankpins separately, held offset in the 4-jaw chuck, then put the shaft through both of them and silver soldering, with a spacer between the two throws. Align the crankpins by drilling through and putting a rod through both. Cut away the surplus shaft between the webs. Alignment is guaranteed. Less swarf, and easier to turn the pins when close to the chuck. I made the crankshaft for my traction engine by silver soldering an oversize shaft through a block and turning the pin with throw pieces, then turning the shaft down to size. It was fine. Shaft is ten inches x 1/2 inch, throw 1 inch. Paul
Andy_G	16/02/2021 14:27:40
260 forum posts	That’s the way I would propose to do it. It’s the way I made my one and only single cylinder IC engine crank shaft. (Steel crank webs silver soldered to silver steel shaft & crank pin). I await more learned comments with interest.
Roger B	16/02/2021 14:54:15
244 forum posts 105 photos	Built up crankshafts are fine. Silver soldering will work as will Loctite.

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