EcoModder.com

EcoModder.com (https://ecomodder.com/forum/)
-   Aerodynamics (https://ecomodder.com/forum/aerodynamics.html)
-   -   Inspiration from Tractor Trailer Side Skirts (https://ecomodder.com/forum/showthread.php/inspiration-tractor-trailer-side-skirts-31869.html)

MPGomatic 05-03-2015 09:32 AM

Inspiration from Tractor Trailer Side Skirts
 
Just say no to flat sided skirts? I'm going to add some angle to the front of Slambo's skirts

Duraplate Aeroskirt

Wabash Composites | Products | DuraPlate AeroSkirt®

Ventix DRS

Wabash Composites | Products | Ventix DRS

BabyDiesel 05-03-2015 04:52 PM

I have seen 100s of tractor trailers with the front of the skirt curved inward, and the number is growing everyday. Seeing their skirts like that was a major reason why I took mine off till I can figure out how to tuck them inside towards the front tire.

AbramWagner 05-03-2015 10:38 PM

Very interesting

freebeard 05-03-2015 11:28 PM

http://ecomodder.com/forum/member-fr...bonnevette.jpg

This may be my favorite picture from Bonneville, but I should have gottten one a little more from the rear to show that although the fence starts at the axle-line, the rear edges are flush with the outside of the tire. Do this front and back and then have the sideskirt longitudinal. Maybe shaped more like moldboard/plowshare of a plow.

aerohead 05-05-2015 06:32 PM

angle
 
I think you'll be shooting yourself in the foot if you do this.You don't have landing gear to deal with as on a semi,nor is your spare tire located there.
The flanks of a car should be flush with the wheels.Or enclose them altogether.

BabyDiesel 05-08-2015 05:17 PM

Do you mind explaining why having our side skirts this way is equivalent of piercing our foots with bullets? :)

aerohead 05-08-2015 06:51 PM

skirts this way
 
Quote:

Originally Posted by BabyDiesel (Post 478540)
Do you mind explaining why having our side skirts this way is equivalent of piercing our foots with bullets? :)

*The path down the sides of a car is the shortest and most direct route the air can take to the rear.
*Allowing the air to flow as smoothly as possible there ensures the lowest drag.
*If the pathway is interrupted with a void (behind the front tires) we lose the flow right there.
*There will be reattachment downstream,but that pocket of turbulence has to be paid for with extra drag,continuously as we drive.
*Truly low-drag forms will have flush sides,or better,fully-enclosed flush sides,apart from any Coke-bottling done for pressure control.
--------------------------------------------------------------------------
*On a semi,the landing gear handle is inset to the trailer frame,and also the spare tire /chain rack.
*'Store-bought' trailer skirts are often 'wedged',as a courtesy to the OTR operator who's got to deal with dropping trailers and flat tires.
*Aerodynamically,it's a compromise.No low-drag concept truck uses non-parallel skirts.

MPGomatic 05-09-2015 07:51 AM

Quote:

Originally Posted by aerohead (Post 478560)
*The path down the sides of a car is the shortest and most direct route the air can take to the rear.
*Allowing the air to flow as smoothly as possible there ensures the lowest drag.
*If the pathway is interrupted with a void (behind the front tires) we lose the flow right there.
*There will be reattachment downstream,but that pocket of turbulence has to be paid for with extra drag,continuously as we drive.
*Truly low-drag forms will have flush sides,or better,fully-enclosed flush sides,apart from any Coke-bottling done for pressure control.

Great stuff, Aerohead! What about influencing the air that comes off the tires out of the wheelwell/away from under the car with a gentle sweep by integrating a small flap at the back of the wheelwell that blends into the skirt? Instead of a 90 angle, it might be 100?

gumby79 05-09-2015 12:18 PM

another reason for the pinch front . Snow. .. if the tires of the truck pack snow on the inside = bad

whatmaycome14 05-09-2015 02:51 PM

Aerohead, I appreciate what you've said, but it stirred a question in my mind. I couldn't help but notice that on the bottom of the McLaren mp4-12c has some very short "skirts" behind the front wheels. Is this at all related to the fact that the car doesn't have any side skirts hanging that low?

https://inthemetal.wordpress.com/201...p4-12cs-floor/


All times are GMT -4. The time now is 12:04 AM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com