Today I wanted to talk about the Liberator’s heating system. The Boeing B-17 used glycol to heat air which came in near engine #2, circulating it from the nose back to the ball turret. The Consolidated B-24 was a bit more complex… The Liberator was equipped with six spot heaters made by Stewart-Warner, an automotive heater company from Chicago. These Model 789 heaters were spread throughout the forward two compartments, with two in the nose for the bombardier, two for the pil