I have a bunch of old engines that I was given.
5 Mc Coy 19 red heads pretty much parts only although one is complete and has good compression.
3 Mc Coy 35 2 are parts and one has good compression.
1 OK 29 CL engine with good compression.
1 Enya 09 CL good compression.
1 Cub 0-49 Cl good compression.
And a Spitzy 8 CL with good compression.
I know nothing about old control line engines.
Do they have any value, or are they paper weights?
I have no idea what happened. I thought I was replying here. but wound up in the questions and answers. See i have a question but was just trying to answer.
Mr. Moderator, you may well delete this post in Q&A if it constitutes Double Posting. So Sorry!
Anything and everything has some value at some time. When one buys something, the seller rather have the amount of money and the buyer rather have the item. So any "value" is your determination.
Now there are two general strains of McCoy Red Head engines. The first are those built - mainly for CL Speed and later some sport models and two - those built after Testor Corporation bought Dick out and started rearranging the engine-room furniture.
Mainly those engines ranging over several sizes resulted in some good engines at very low prices for the sport flying crowd. Their life was very short unless you knew the Piston Swelling secrets and could waste a few pistons doing so.
Later Testors came out with the Gray Case McCoy 19, 29, 35, and .40. They had K&B guts in an ugly case. If you seated the dykes ring on the first run, same as those K&B series 61-+, then you got a fairly good engine. However they could be just as bad if you flunked Dykes Ring Seating 1. I can assure you if you flew CL Stunt Competition, you did not want one! I was on the proving ground of preproduction examples in that situation. Funny story now, but not back then.
If you do several searches on eBay you can get some ideas about their value. Don't be swayed by just one example. It changes from day to day.
Best of luck.