View Single Post
Old 09-11-2020, 12:31 PM   #53 (permalink)
Snax
Master EcoModder
 
Join Date: Dec 2008
Location: Eugene, OR, USA
Posts: 382

Lord Vader - '15 BMW i3 REx
90 day: 35.06 mpg (US)
Thanks: 90
Thanked 170 Times in 126 Posts
Quote:
Originally Posted by JulianEdgar View Post

(1) Downforce
(2) Neither lift nor downforce
(3) A small amount of lift
(4) A lot of lift

Just putting down the number that corresponds with your guess would be good.
Before reading further in the thread, guessing #2, and potentially #1.

----------
Post read: Having no idea that they left the bottom basically flat, makes sense all around to me.

The Cambridge car crashing also makes a lot of sense. A crosswind against that profile at speed clearly lifted the rear while creating significant yaw force.

I think one way to address that issue without actually changing the form of the car would be to have 4-wheel steering, allowing the car to crab down the road dynamically with wind gusts. That would obviously only work to a point and is probably completely impractical in terms of lane keeping though.
__________________
2015 BMW i3 REx
2011 Ford Flex SEL AWD

Last edited by Snax; 09-11-2020 at 12:46 PM..
  Reply With Quote
The Following User Says Thank You to Snax For This Useful Post:
aerohead (09-11-2020)