Originally Posted by
tdracer
Having race air-cooled engines, one trick to keep air-cooled engines from overheating was to run them intentionally fuel rich - the extra fuel that can't burn acts to keep the peak temps down (rather counter-intuitive to run more fuel to cool the engine but it works). Of course that has an adverse effect on range...
Funnily enough, many rocket engines use the same trick to stop the nozzles melting. Nothing new under the sun!