Cox .15's - My new best friends.

Wow, where are you guys hiding these things.....they get very little notice here.  It's .049 yada, yada, and more yada and I'm as guilty as anybody.

I was looking for .15 sized engines to back-up that Fox on my latest trashed model "Racer."  Enya/OS - been there when I spied these Cox .15's in the back of my display case.  Probably toss-in's from engine buys of long ago.  One a TD the other a throttled Medallion.

I have owned other Cox .15's, a Sportsman and a Conquest but I never ran either of them and these two are the first Cox .15's that I have ever run. And wow again.  After initial difficulties with the TD it eventually ran.

The TD would run off the prime and that was it, needle full off to full on and everything in between.  Finger over the venture and crank the prop showed no fuel draw.   Removed the needle, wiped it off and blew out the NVA with low pressure compressed air.  Replaced the needle to no particular position and it started on the first turn of the 9/8 prop.  Leaned it out somewhat and tached it.  Fed from what is perhaps a half ounce bottle it ran forever....great mileage over other .15's that I have ran.

The R/C Medallion is the jewel.  Started right off and ran well sloppy rich to lean with no complaints.  I operated the throttle with my finger.  Painful.  A poor test but it did not seem to have the rpm range that Mauricio get's out of his .049's.

Good to know I have good engines to back-up that Fox .15.







Treated both to an after run clean-up of Remoil, compressed air blowout, and after run oil.  They will be ready if I ever finish the Racer...

BTW I did not run the medallion with that clipped 7/? prop.  I replaced it with the 9/8, probably not the best prop for these.