Quote:
Originally Posted by freebeard
This states that the prolated spheroid has a 15% advantage over a 'bi-hemispherical cylinder' which I assume is a hot dog shape. This is by volume, not frontal area.
My question is why it looks faster backwards. I surmise the area ahead of the propellor acts as an invert Coanda nozzle. Laminar flow all the way to the tail. Maybe a little Meredith Effect?
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I'd call it a prolate ellipsoid.
Hot dog is exactly correct. Hoerner has a Cd for that.
Volumetric drag coefficients were also very common for airships and submarine outer hulls.
Just beyond the hatch on the side with the porthole would be about the limit for LBL on the fuselage. It would pop over to TBL beyond there.
All the wings and stabilizers would behave in kind. LBL up to max thickness, then, pow!
Some of the reflexive tail region will be filled in with the sloughing boundary layer.