I have a motor I need an ID for. I hope someone can help with this.





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The top end is COX, the rest, I've never seen befor

Don

Actually the whole thing looks like a Testor's product engine with spring start.

I got a bag of the lower ends for these if you need one. The crankcase is made of a plastic.

Do you know the livery of the engine?

Plastic?? No wonder COX is no longer around.

Don

No not Cox, Testors.
http://www.mh-aerotools.de/airfoils/cox_frameset.htm
If you check under Other Small Engines you will see the same engine listed with the pot metal crankcase.

Must be the McCoy .049 it's case is black and does appear to be possible plastic. Engine looks brand new and yes it has the springstart built in the nose. I found it in a box of misc. parts I bought. Will consider offers on it if anyone is interested lol. Engine spins nice and smooth with great compression. Spring Start is real strong.

Konrad, you should snag that one. There's got to be at least a couple weeks worth of technical examination/evaluation in that engine....

Looks to me like a WenMac .049....I have a couple but pix not clear enough.

Actually looking at the clarity of the photos it looks more like a project up your ally. I look forward to your mechanical analysis and findings within plus or minus 0.5 mm. I do have set of Vernier tools I could lend you if that would help. Or are you more comfortable with a yard stick.

Sorry this is an inside joke.

All the best,

Konrad

Nothing on that engine is cox, it is a testors .049

I flew them when I was a kid in the 70's Cox was not the only game in town..............

Best to take the piston and cylinder off and use it to rebuild a nice metal case Testors McCoy .049.

The Testors/McCoy engine shown in the pictures sprung from the old Wen-Mac line of engines.

In 1969, I bought a Testor's Skyhawk RTF (ready-to-fly) single channel R/C model. It was powered by a metal crankcase version of this engine. I was a little leary of the engine when I bought it because of all of my previous Wen-Mac experiences. The latest experiences were pleasant, but all of those years of messing with the miserable versions of Wen-Mac engines tainted my perceptions and biased me against this latest engine. It turned out that there was no reason to worry, as long as you used Cox fuel. Other sport fuels, like that burned in my OS .58 and .35 S/RC engines, did not have the punch that the little .049 engine required. That little Testors engine just got better and better as we flew the dickens out of it during the Spring, all Summer and well into early Winter before giving it to a good friend.


Ed Cregger

Love those little rotary valve Testors .049s. Mine run great.

It most likely came out of a "Fly 'Em" series Testors control line airplane...early 70's...

I had one, I think the last model they produced, which had mounting holes on the tank which matched Cox mounting holes. I never got it started, not even a pop, and finally gave it away. I have a couple old WenMac 049's. Once I got them broken in, they start and run nicely, not very powerful. I may put one in a sport free flight some day.