Actually its from 1959, some engines have so much heat in the engine bay that it was used to help prevent vapor lock....cold air was ducted from the front of the engine bay via a hose. Tim
I would have thought for an aircraft, it would be more useful for heating/warming the fuel pump/fuel, since I thought at altitude, temps dropped, especially in inclement weather, and a carb freezing up would be bad. What do I know?
The temp does drop.. 3 degrees for every 1000 ft.. but a plane
also has carb heat now days... I did a LOT of work with 4 cyl
fuel foaming when the fuel would boil and vaporize and the
engine would almost die on a hard accel.. we came up with a few
things that worked.. the added volume can and the rubber
isolator that many remember on the 4 bangers
