View Single Post
Old 11-18-2020, 04:17 PM   #93 (permalink)
aerohead
Master EcoModder
 
aerohead's Avatar
 
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 16,279
Thanks: 24,401
Thanked 7,368 Times in 4,767 Posts
'absurd'

Quote:
Originally Posted by JulianEdgar View Post
The whole idea that 'basic shapes' (let alone 'the template') can guide us in the following is just absurd:

- Show where there is separated and attached flow on existing cars
- Guide the shape of rear extensions
- Show how rear spoilers on sedans should be positioned and shaped
- Allow the assessment of the ‘aerodynamic purity’ of cars

Maybe you should read some current aero textbooks, or do some proper on-road testing, to find that out for yourself?

Even the first in the above list ("the template will show us where there is separated and attached flow on existing cars") can be disproved in a few hours of tuft testing - as I showed in the video.

Seriously, we've (I hope) moved beyond blind faith in incantations.
* If you'll re-read Hucho's 2nd- Edition, you'll realize that you're scientifically incorrect on all four counts.
* Your own book corroborates everything I've posted about the 'template.'
* No current textbook can overturn the fundamentals of fluid mechanics.
* If you'd understood Hucho's book you'd already know that you're completely mistaken about most of your conclusions from your measurements.
* You didn't show us anything of value in your video. It' s very misleading.
__________________
Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/