Nope, combustion engines generate MUCH more heat than electric engines. Also they don't use exhaust to cool the engine, with all due respect, your argument is e

Nope, combustion engines generate MUCH more heat than electric engines. Also they don't use exhaust to cool the engine, with all due respect, your argument is entirely backwards. It will be easier to cool electric engines and they will need smaller radiators (if any, have you seen radiators on engines in drones?). More probable is that you will need to heat batteries so that they don't freeze at higher altitudes.