View Single Post
Old 09-09-2015, 01:59 PM   #155 (permalink)
Master EcoModder
aerohead's Avatar
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 11,520
Thanks: 18,531
Thanked 6,037 Times in 3,686 Posts

Originally Posted by getzfamily View Post
Just wondered if anyone has any info about the potential improvement if going a somewhat smaller mirror and then creating the ideal shape around that size? i.e. the body of the side mirror would end up significantly longer/larger but would the improvement in aero be more significant than the negative of larger body in air?
So far,we've got a number of considerations to think about and there's no generic recipes for low drag mirrors.
Drag will be affected by:
*distance from body
*shape of housing
*shape of mounting stalk
*frontal area
*local velocity
*local flow pattern
*degree of mirror inset from 'end' of housing
Here you can see the difference in drag for a solid body of revolution with a prolate elliptical nose.The lowest drag bodies are rather 'long.'
Photobucket album:

Last edited by aerohead; 09-09-2015 at 02:02 PM.. Reason: English correction
  Reply With Quote
The Following User Says Thank You to aerohead For This Useful Post:
Daox (02-23-2016)