01-16-2019, 05:17 PM
|
#91 (permalink)
|
|
Master EcoModder
Join Date: Aug 2012
Location: northwest of normal
Posts: 27,665
Thanks: 7,767
Thanked 8,575 Times in 7,061 Posts
|
You're an ecomodding hero. What year was that? No mention of Darko because it was a different vehicle?
Et tu, Gumby.
__________________
.
.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
____________________
.
."We're deeply sorry." -- Pfizer
Last edited by freebeard; 01-16-2019 at 05:33 PM..
|
|
|
|
|
The Following User Says Thank You to freebeard For This Useful Post:
|
|
 Today
|
|
|
|
Other popular topics in this forum...
|
|
|
|
|
01-17-2019, 12:27 AM
|
#92 (permalink)
|
|
Master EcoModder
Join Date: Dec 2014
Location: Butte, Montana
Posts: 725
Thanks: 208
Thanked 427 Times in 278 Posts
|
Same same.
I tested more than 1 configuration before settling on 5" center and 7" on the corners of the air dam. Posted hear.
Quote:
Gumby /David
V1 prototype was just the 2.5" Bronco air dam bolted to the bottom of the bumper I did not notice a positive or negative change on the gravity drop acceleration test
|
https://ecomodder.com/forum/showthre...rty-35894.html
You had been active in the thread, thought you knew about the gravity drop results. Pine wood derby cars in Cub Scouts taught me these fundamentals. The heavier more streamlined a block of wood when's the race with one gravity horsepower.
__________________
1st gen cummins 91.5 dodge d250 ,HX35W/12/6 QSV
ehxsost manafulld wrap, Aero Tonto
best tank: distance 649gps mi 24.04 mpg 27.011usg
Best mpg : 31.32mpg 100mi 3.193 USG 5/2/20
Former
'83 GMC S-15 Jimmy 2door 2wd O/D auto 3.73R&P
'79 Chevy K20 4X4 350ci 400hp msd custom th400 /np205. 7.5-new 14mpg modded befor modding was a thing
87' Hyundai Excel
83 ranger w/87 2.9 L FI2wd auto 18mpg on the floor
04 Mitsubishi Gallant 2.4L auto 26mpg
06 Subaru Forrester XT(WRX PACKAGE) MT AWD Turbocharged 18 plying dirty best of 26mpg@70mph
95Chevy Blazer 4x4 auto 14-18mpg
04 Chevy Blazer 4x4 auto 16-22mpg
|
|
|
|
|
01-17-2019, 11:08 PM
|
#93 (permalink)
|
|
Banned
Join Date: Nov 2017
Location: Australia
Posts: 2,060
Thanks: 107
Thanked 1,605 Times in 1,136 Posts
|
Tufts, surface pressures and local flow veclocities
|
|
|
|
|
The Following User Says Thank You to JulianEdgar For This Useful Post:
|
|
|
01-18-2019, 04:10 AM
|
#94 (permalink)
|
|
Master EcoModder
Join Date: Jan 2017
Location: Istanbul
Posts: 1,245
Thanks: 65
Thanked 225 Times in 186 Posts
|
Thank you for these videos!
Very informative.
What should we as ecomodders be aiming for? Suspension compressed or elongated? Or no change at all?
|
|
|
|
|
01-18-2019, 04:46 AM
|
#95 (permalink)
|
|
Banned
Join Date: Nov 2017
Location: Australia
Posts: 2,060
Thanks: 107
Thanked 1,605 Times in 1,136 Posts
|
No lift or downforce will result in less induced drag. ie no suspension height change with speed.
However, it's a bit more subtle than that because if there is lift or downforce present, you need to get rid of it without then creating a lot of drag.
As Dick Barnard said to me when we were working on the book, you can destroy lift by placing a fence across the curved roof - but that won't be so good for drag!
|
|
|
|
|
The Following User Says Thank You to JulianEdgar For This Useful Post:
|
|
|
01-19-2019, 04:13 AM
|
#96 (permalink)
|
|
Banned
Join Date: Nov 2017
Location: Australia
Posts: 2,060
Thanks: 107
Thanked 1,605 Times in 1,136 Posts
|
Resolving the direction of forces caused by the surface body pressures you can measure - lift and downforce, thrust and drag.
|
|
|
|
|
The Following User Says Thank You to JulianEdgar For This Useful Post:
|
|
|
01-19-2019, 12:30 PM
|
#97 (permalink)
|
|
Master EcoModder
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 15,883
Thanks: 23,957
Thanked 7,219 Times in 4,646 Posts
|
what year
Quote:
Originally Posted by freebeard
You're an ecomodding hero. What year was that? No mention of Darko because it was a different vehicle?
Et tu, Gumby.
|
I ran Bonneville and did the Chrysler Proving Grounds both in 1991.
It was with 'Spindletop',the streamlined 1984 HONDA CIVIC CRX HF.
It would be in my photo library at the Aero Forum.
__________________
Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/
|
|
|
|
|
The Following User Says Thank You to aerohead For This Useful Post:
|
|
|
01-20-2019, 02:56 PM
|
#98 (permalink)
|
|
Banned
Join Date: Nov 2017
Location: Australia
Posts: 2,060
Thanks: 107
Thanked 1,605 Times in 1,136 Posts
|
Separation edges and wake size.
|
|
|
|
|
The Following 2 Users Say Thank You to JulianEdgar For This Useful Post:
|
|
|
01-20-2019, 03:46 PM
|
#99 (permalink)
|
|
Master EcoModder
Join Date: Aug 2012
Location: northwest of normal
Posts: 27,665
Thanks: 7,767
Thanked 8,575 Times in 7,061 Posts
|
My favorite dust picture:
It shows the three zones of turbulence around an open wheel. The top is defined by dirt carried over-top by the tire. The center vortex is mixed with turbulence off the axle, and the vortexes off the leading edge of the contact patch are still low to the ground by the time they reach the back tire.
__________________
.
.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
____________________
.
."We're deeply sorry." -- Pfizer
|
|
|
|
|
The Following User Says Thank You to freebeard For This Useful Post:
|
|
|
01-21-2019, 03:06 PM
|
#100 (permalink)
|
|
Banned
Join Date: Nov 2017
Location: Australia
Posts: 2,060
Thanks: 107
Thanked 1,605 Times in 1,136 Posts
|
|
|
|
|
|
The Following 3 Users Say Thank You to JulianEdgar For This Useful Post:
|
|
|
