Chipmunk Carb Heat
BEagle:
I don't remember any mention of carb heat in relation to engine materials, but this may have become a problem as the higher octane fuels had to be introduced. The carb heat was certainly wired in 'Hot' in 1954, when the fuel in use had a rating of around 70 to 80 (anyone got a copy of the early PN?) which is what I'd have thought the Gypsy Major was intended for.