RCU Forums - View Single Post - YS Muffler on a Series 21 McCoy .40 Black Head Engine
Old 02-18-2013, 12:41 PM
  #4  
Lou Crane
 
Join Date: May 2006
Location: Sierra Vista, AZ
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Default RE: YS Muffler on a Series 21 McCoy .40 Black Head Engine

George,

A lot depends on what kind of flying you have in mind...

The McCoy Series 21s were at least an ounce heavier than other engines of like displacement, unmuffled.

As you mention, the Sterling profile F6F isn't much larger than a Ringmaster, so weight may be important. For just bashing the sky around - pure sporty flying - your combo should be fine. It might not stunt too well, and the kit isn't eligible for Old Time Stunt. It was introduced long after the event's "cut-off" eligibility date (31 Dec 1952 or earlier.)

Might be an idea to drill up through the fuselage and leading edge to epoxy in a 3/16" dowel to reinforce the wing-fuse joint, too.

Just for the uncomplicated joy of CL flight, it looks good. The weight might make it glide "a bit steeper."

Enjoy!