Agree with Brad - Brodak 40. Modern light purpose built engine, can run standard glow fuel Sig 10% N, 23% (50/50) oil. Prop - APC 10.5 x 4.5 or 11 x 4. They like a bit of rpm so somewhere around 10 - 11k launch rpm. If new, they also take a while to break-in so if at first it is finicky just keep flying somewhere around 50 flights it will settle in.
Best, DennisT