Thanks for looking and taking interest in the Area 51 engine, It is a 51cc engine that puts out the power of most 60cc engine.
I have been buying and testing engines for about a year to come up with this one, It comes from a machine shop in China where the owner is the one that machines and assembles the engine. He is not a mass product type company and we have been one on one to come up with this engine.
When I got the last engine from him and mounted for test run I could not believe the rpm reading I was getting with a out of the box engine, 7050 on a 22-10 carbon fiber prop and 7080 on a Vess 22-A. I thought something was wrong with the tack so I went and got new batteries to come up with same reading, Tested tack next to AC light and it checked ok, Finally I went to a friends house and got his tack, All gave the same reading
The engine is a ounce or so heaver that some of the 50cc engines out there, The manufacture and I have had long conversations about this and could take off the extra weight off with a lose to the durability of the engine. The mounting ears are heaver than most and we want them to hold up in case of a crash.
Will get more information on my site as soon as possible