This is a Constant speed drive and starter system built by Airesearch in the early 60's and used to start larger turbine engines. This one appears to be in good condition and spins smooth and freely. It's basically a small jet engine with a gear box connected to it. It's a pretty neat little unit. I did not run it and I'm not sure what it would take to run it. I got it at a surplus auction and have just had it on display. I will crate and ship it in the lower 48 states for $100. It weights about 65 lbs. (without a crate) and is 14" long and about 14" wide.