View Single Post
Old 05-17-2019, 01:09 PM   #13 (permalink)
freebeard
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 16,273
Thanks: 4,285
Thanked 5,486 Times in 4,370 Posts
Dirt doesn't affect drag but rear-view mirrors do. There is going to be some scale, depending on the thickness of the attached flow, below which there's no difference.

It might depend on the angle of the flow to lengthwise of the trim. And it might be possible to over-reach for the optimum.
__________________
.

Donít push your slower friends down in an attempt to save yourself from a bear, advises National Parks Service

_________________
  Reply With Quote
The Following 2 Users Say Thank You to freebeard For This Useful Post:
aardvarcus (05-17-2019), aerohead (05-22-2019)