This Guillow's P-40 Warhawk kit is like the one I had in the late 1960s or early 1970s, as a boy in Mayo, Maryland. The plans showed and parts were supplied for configuring the P-40 as a Cox .020−powered or .049−powered control line (C/L) model, which is the way I built it. I put a Cox .020 engine on mine and set it up for C/L. the framework proved to be nowhere near rugged enough for the weight and vibration of the engine. Admittedly, I am not known for building particularly light models due mainly to my preference to build strong and use enough dope to give a good opaque paint job. My flying skills were / are not contest quality either for that matter, but the wing folded on the first or second flight, and that was the end of my P−40 Warhawk. A small brushless motor and LiPo battery should make other than rubber-powered flight much more viable than a screaming, vibrating, oily Cox .020 (although I readily confess to loving the sound and smell of the latter).
Here is the Comet P−40E Tiger Shark kit.
Wingspan = 27-1/2" | Power = Rubber or Cox .020 | Kit #405
Guillow's P-40 Warhawk Kit parts & plans
Guillow's P-40 Warhawk box top edges