Earlwb,

Nice photos, are these part of your collection. I always wondered what exhaust system would be use on the multi-cylinder engines.
Those exhaust stacks look kind of small, where they actually used or just for display? The 61 I posted is for sell (280 euro/$362) on
ebay.de, there were a couple others there also.

TFF,

I never read the review or use one but I always thought because of it design, that the Ross 61 might have been in the same power
range as the K&B and Super Tigre blue head PDP engines. I agree, back in the day when the 61 engine was king, the pattern guys
were the makers or breakers. Lots of guys flew or tried to fly pattern, I've never heard of Ross being used. Maybe it was good sports
engine.