Quote:
Originally Posted by freebeard
The radiator is mounted behind the driver's seat, with air intake through twin ducts that IIRC ran through the doors, with an exhaust chimney. For possibly more than 0.025 delta.
If that was about the Greenbrier, cooling system drag is substituted by fan power. No Mustang (car or plane) ram air for cooling.
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Maybe, comparing the road load of the Greenbriar, to that of a Ford Econoline, at Cd 0.50 and its CdA, we'd compare added cooling fan horsepower, compared to the horsepower reduction accomplished with the lower drag, and look at the differential.
On a frontal area basis, the lower Cd means lower power, lower heat flux, reduced cooling load.
The Corvair is starting out with 24% less drag.
As to the P-51 Mustang, remember, we're talking about transonic/ compressible flow, something unachievable in a road vehicle at posted legal speeds.