Getting dirty - "poor" boot / trunk design on E60
#11
Contributors
Join Date: Oct 2006
Location: North West Los Angeles
Posts: 24
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 2008 - M5 - Alpine White - Portland Brown Full Merino - Madeira Walnut - Manual Trans - Enhanced Premium Sound - HD Radio - Sirius- iPod - Sun Shades - Soft Close Doors - Comfort Access
![Default](https://5series.net/forums/images/icons/icon1.gif)
I believe the ?leathers? xBMWx is referring to are the traditional German garb called ?Lederhosen?.
Perhaps you?ve seen those German/Austrian short-pants with the built in suspenders oft seen during Oktoberfest? My understanding is the shorts are made of leather (Lederhosen), traditionally worn with no under-garments and are never, never washed!
Perhaps the only allowable way to wash them is to stand in the rain?
Perhaps you?ve seen those German/Austrian short-pants with the built in suspenders oft seen during Oktoberfest? My understanding is the shorts are made of leather (Lederhosen), traditionally worn with no under-garments and are never, never washed!
Perhaps the only allowable way to wash them is to stand in the rain?
#12
Contributors
Join Date: May 2005
Location: Chicago, IL
Posts: 1,986
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://5series.net/forums/images/icons/icon1.gif)
Originally Posted by xBMWx' post='347916' date='Oct 23 2006, 09:58 AM
it collects all the water and dirt off of the rear of the car.
![Think](https://5series.net/forums/images/smilies/imported/think.gif)
The smooth, laminar boundary layer of air flows over the entire length of the car, and as it separates at the tail it becomes turbulent. This creates an area of low pressure right there, just under the lip of the trunk down to the bumper surface. This actually is smart work - keeping the boundary layer attached to the body all the way. If the boundary layer detached any sooner you would have even more drag on the surface.
However, all that dang dirt that was flowing along smoothly gets deposited on the rear bumper. Have you ever noticed that just after you wash the car and drive it even for a few klicks the bumper is all dusty?
Disclaimer: I was usually really hung-over for my 8:20 am Fluid Dynamics class, so this could be the beer talking.
![Tongue](https://5series.net/forums/images/smilies/imported/tongue.gif)
Thread
Thread Starter
Forum
Replies
Last Post
incoherent
E60, E61 Parts, Accessories and Mods
9
04-15-2015 04:48 PM