Found these engine parts in a box I bought today. I have seen Baby Bees, TD's, and even RR-1's, but I hve never seen this before. The text on the bottom of the crank says "Thimble Drone". The crank is threaded at the prop shaft, and the needle valve is offset on the back plate. I beleive the backplate is part of the same engine as the mount holes are the same.
Is this something good, or just more junk?

another pic

one more

Terry, looks like a "Space Bug" or a "Thermal Hopper" maybe? If you post these pics in the 1/8 to 1/2A forum, I'm sure you'll get a definative answer...

"Space Bug Jr" & not quite enough to be worth anything . One in running condition about $30.00 to $40.00 MAX H.

Thanks for the info.