RE: What engine for a Platt P51?
Well I have a Yellow Spit with a Moki 1.8 and a TF Mustang with a G-45. Both planes fly pretty scale like. I fly at near sea level. When I bought the Moki there was no 2.10 but it's not a bad choice to consider. You can always use the throttle and you might want the extra power for your next project.