ORIGINAL: Jeff Worsham
What years were the HP .61's used most? I've got one NIB and would like to put it on a "period correct" airfame. Seems to me early to mid 70's but can't remember for sure as I was pretty young then.
Hi Jeff,
On in our RC model club one member had a HP 61F RCwith "blue top" - he bought it new in early 1970th, probably 1972-1973. He had it in a Svenson Fly Boy to start with and then in a Midwest Mach 1.
It was one such HP 61 F RC, almost NIB, (not blue head but same otherwise) for sale at ebay some weeks ago and I made a bid on it but was not at home when bidding was near to close so I had no chance to bid higher - and I lost the bidding (of course...). It was sold for $188. Picture of that engine sold on ebay below. Is it same engine You have?
/Bo