BEST + CORRECT Aerodynamic FRONT

[slipknotsv]

BEST + CORRECT Aerodynamic FRONT










test 1 0.12


test 2 0,13

[slipknotsv]

good...........

[freebeard]

You are focusing on the loft line (profile) and ignoring the wheelwells.

In turns the top of a tire doesn't move in/out as much as the middle of the wheel/tire. A uniform radius from the resting center of the wheel is sub-optimal.

[slipknotsv]

that it's nose is nothing remarkable,although it does have a complete boat-tailed rear.

[freebeard]

Or maybe it's a bluff nose with a low stagnation point, and a rear end that is too fast—intentionally, to improve cooling air intake—but too fast none-the-less. The narrowed front axle is good prep for front wheel skirts.

What a corrected Beetle body might look like.

[aerohead]

here is some data from R.G.S.White at MIRA,1969,
look at plan and elevation

if you take all of his best of each category you get Cd 0.245 (in 1969)

here's some windshield data from FIAT

cowl height

and nose

front lift

from Fachsenfeld (KAMM)

Hoerner

Eiffel

Eiffel

Walter Lay,1933

[slipknotsv]

Big thanks Aerohead

[Frank Lee]

One of these is optimal but I'm not sure which.

[freebeard]

aerohead -- So I try to get by with a rerun, and you throw out a whole bunch of new stuff. I think I'd seen only the last two before.

The first one is fun! For the Beetle, I get A-2 B-2 C-1 D-1 E-7 F-1 G-6 H-4. Is there a secret decoder key?

Frank Lee -- It's a setup. You want us to have to admit it's that first one. I'm going to go with:


It's all about the fineness ratio.

[Frank Lee]

Fineness ratio? I thought it was about fuselage length.