Joe - there are at least two Webra 61s. Which one do you have?

Photo would help.

Bob Z.

Bob,

There's not much in the way of identifying marks on this engine.  Just says "Webra-Austria" under the cylinder (exhaust side) and "WEBRA-61 on the opposite side.

The cylinder has cooling fins all the way down to the crankcase.  Six (6) bolt head.  Looks like three (3) ports in the cylinder.  Ringed flat top piston.

Beyond that, there's not much more to, physically,  describe.

I'll try to post a picture, but will have to wait until my son comes home from work with his digital camera.

Thanks for your interest.

Joe

Joe,

Sounds like you have the "Speed 61". The original Webra Blackhead was one of the finest RC Pattern engines of all time. I used them back in 1970 - 72. The Speed 61 was their first Schnuerle engine. The first ones didn't have any muffler lugs; they used a hose clamp fitting. They have since fixed that problem and it's another excellent engine, but I'm not sure it would be worth the effort to convert it to CL. You can still buy them and get parts through Horizon Hobbies.

Most RC engines are heavy. A decent PA or RO-Jett 61 will weigh in under 12 ounces. The typical RC engine will hit 15.  The timing is very different as well. These engines were designed for RC Pattern and they needed all the horsepower they could get. Back then, the FAI rules limited us to 10cc engines and we were still going vertical with 9 - 10 pound airframes. 

Take care,

Ron

Thanks, fellas' for the input on the Webra .61

This engine  appears to have been used very little, if any and I just thought it might be worth converting to c/l but it sounds like it probably wouldn't work out too well.

I tried it on the bench and it started with one flip and sounds really strong.  Throttle responce was good.  Maybe someone who flies r/c or perhaps throttle controle c/l could make good use of it.

Regards,

Joe