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Post  VUgearhead on Mon Jun 20, 2016 12:43 pm

I am not familiar with the later years Cox cast engines, never owned one. But I was curious if they perform equally to the older milled case Cox engines.

I am particularly curious about the differences, if any, between the Cox RC Bee and the older Dragonfly engines.

Does anyone have experience with both where they could offer a comparison of the two engines?


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Dragonfly vs. RC Bee Empty Re: Dragonfly vs. RC Bee

Post  ian1954 on Tue Jun 21, 2016 9:44 am

I personally have not seen a difference in performance and actually prefer a cast crankcase to a milled one. (Unless it is an engine I have made!). There is more character about a cast crankcase.

As for longevity I can't comment - but the cast crankcases were introduced as a money saving option to save on machining time. This didn't quite work as planned because the cast crankcase took more setting up time before it could be machined and was not easy to set up for machining.

There are bound to be differences in wear as the material will be different and, some of the cast crankcases I have, have been machined a little off centre and are not perfectly symmetrical at the back. They still run fine though.

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