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#19
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Hershey bar wing vs composite wing - how much drag?
("cavelamb himself" wrote)
And a LOT of the drag is from cooling the engine! There is an ideal place for big gains. Ercoupe, Cessna 172, Piper Warrior: How much drag would be eliminated it the prop was spun from, say, a (hypothetically capable) electric motor - of the same weight as the engine? An electric motor that needs little of the cooling air (drag) required by the gas engines. WAG, is a LOT ...33%? Whatever the guesstimated drag number settled on, what then would that number mean in cruise speeds, or fuel burn? 10% improvement? 20% improvement? 30%? Montblack |
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