Thanks I build them you can buy kits that are prebuilt, but the majority are built and painted by me. Top speed on these 80MPH. The giant ones in the top picture, I am running 2 stroke engines O.S. 1.60s pumping out four horses. I run 10% Nitro with synthetic oil for lubrication. When doing aerobatics flying about 300 ft for doing flat spins, and flying down off the deck about 15 feet. These are replicas of full size the giants are 80 inch wing span. The red and white one is a Super Chipmunk that I built in my own colours it was published in one of the model magazines a few years back. These Planes do everything their full size counterparts do . Hamerheads,rolls , inverted flight, snap rolls, Knife edges . Its very exhilarating when flying them.