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Cox .049’s get a mention in Kitplanes magazine

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Cox .049’s get a mention in Kitplanes magazine

Post  batjac on Sat Oct 10, 2015 10:22 pm

Kitplanes magazine is doing a multi-month article on basic engine design, and in the first installment in the October issue, they reference the Cox .049 when mentioning cylinder design:

“A primary selection is how large to make the cylinder. Larger cylinders – greater diameter, piston stroke, or both – make more power, but when all the physics are considered, one huge cylinder doesn’t cut it.  Scaling up an .049 Cox Thimble Drone to lift an RV-10 would lead to teeth-buzzing  balancing issues, horrible friction, tremendous fuel waste, and be rather difficult to prop start.”

FYI an RV-10 is a 4-passenger plane with a gross weight of 2,700 pounds that cruises at about 200 MPH.  It uses a Lycoming IO-540, about 11,040 times the displacement of our .049's.



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Re: Cox .049’s get a mention in Kitplanes magazine

Post  dckrsn on Sat Oct 10, 2015 11:10 pm

How about scaling-up a TeeDe? cheers(I kill myself).
Thanks for that Mark. Neat to see the reference.
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