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Discussion on Stirling or "hot air" engines (all types)
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Longboy
Posts: 107
Joined: Thu Oct 29, 2009 11:17 pm
Location: Tucson, AZ

Re: Simple Question about engine timing

Post by Longboy » Wed Dec 16, 2009 9:06 pm

...........Since cylinder phasing takes place at the crank its not going to matter the position of your cylinders..............you always need a 90 deg. difference so your illustration is not correct. You only see Stirlings with parrallel cylinders with two crank pins 90 deg apart or at 90 degrees to one another with both rods connected on a common crank pin. If you do a 60 deg cyl. spread the rules don't change. If you moved the larger cylinder to 120 degrees from the smaller cyl. on the same radious and your crank connection remains (90 deg.in a corrected illustration). This would just change the position of the piston to higher up in the bore. The relation of the pistons in both bores stays the same, one leads/follows by 90 deg.

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