Is this an 020 product engine?

Hi Simon, I'm pretty sure that engine came from a Cox "Army Trainer" control-line model airplane. That model was one of the VERY few that was powered by a Cox .020 reed-valve engine "without" an integral fuel tank.





That looks like the animal. You "could" call it a product engine.. but I believe that it's limited to "that" model. I'd buy it.. but that's just "me".. and I don't even own a Cox .020 engine. The needle is there.. and that would be a factor. It would allow mounting an engine with a fuel-tank of your preference.. such as for a free-flight model airplane.

To my knowledge; the only other Cox .020 engine that was designed for a backplate/carb was their "Sky-Copter".

Many thanks all. I think Roddie got it spot on. Never seen one of those before hence my curiosity.

I bought an 0.020 many years ago that came with a clear tank, no colour anodizing. I suspect it was from some sort of rtf plane. It had very little compression and would only run if i loaded the fuel with a ton of 3 in 1 oil.

I bought one of those on eBay either early this year or late last year. paid about the same, I think. Nothing particularly special about it. It's just a PeeWee with a back plate for an external tank. I just wanted that specific firewall mount for a future project.

The Particular Mark