The Craftmans Shop > Model Engineering
Side Valve i.c. engine from Bar stock
Stilldrillin:
Well done, Brian! :clap: :clap:
David D
awemawson:
Looking good Brian
Is that con rod the finished article or are you planning to slim it down a bit? It's certainly chunky as is.
Brian Rupnow:
I'm going to leave it chunky. This is not a high speed engine, so the mass of an aluminum connecting rod is not really a big issue. On higher speed engines, where the weight of a a connecting rod can cause balance problems, slimming the rod down has advantages. It also has advantages for the manufactureres, where cast rods are used, because it saves material.---Brian
Brian Rupnow:
Jeez, we're really coming down to the wire here folks.The two knurled items in this post will be what allows me to grip the ends of the camshafts and rotate them by hand after loosening of the set-screws in the timing gears to adjust the cam timing. They also limit the axial movement of the camshafts in their bushings. They will be bolted and Loctited to the ends of the camshafts.
Brian Rupnow:
These are the parts I've been saving until last, for two reasons. First reason is that 95% of the engine has to be built before their is a place for them to go, and the second reason (the real reason) is that I'm not sure how I am going to make them. The method outlined by Malcolm Stride in his Bobcat/jaguar/Lynx series works very well, but involves an awful lot of mill cranking. The second method which I believe Chuck Fellows made a video of and involves doing them in a rotary table on the mil looks a lot simpler, but I'm not certain about being able to hold the accuracy with the Chuck Fellows method.
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