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Re: What engine would you like to see made?
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Posted by N on July 04, 2006 at 15:41:55 from (65.207.2.2):
In Reply to: Re: What engine would you like to see made? posted by mjbrown on July 04, 2006 at 15:01:20:
You're close. The correct equation for the displacement of each cylinder is - pi*r^2*stroke Where r is the radius, or 1/2 of the bore. The equation you were using would tell you the area of the cylinder swept by each piston. I forgot to show pi in my earlier equation, but the answer was right (I cheated and didn't actually work out the numbers). For the 1/4 scale merlin, with a bore of 1.5 and a stroke of 1.5, each cylinder would displace - 3.14*(.75^2)*1.5 = 2.65 cubic inches So, the 1/4 scale merlin would displace 31.8 cubic inches if the full-size merlin had a 6X6 bore and stroke.
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