View Single Post
Old 05-27-2020, 02:36 PM   #17 (permalink)
gumby79
Master EcoModder
 
gumby79's Avatar
 
Join Date: Dec 2014
Location: Butte, Montana
Posts: 725

little jona - '91 Dodge D 250 first gen cummins LE
Team Streamliner
90 day: 23.4 mpg (US)

Little Jona airo modded - '91 Dodge RAM 3/4 TON D 250 2×4 AUTO
Pickups
Team Cummins
90 day: 18.5 mpg (US)

The Salted Hound Jenny. - '87 Dodge Ram 50/D-50 5sp 4X4
90 day: 20.24 mpg (US)

Jona Allison aero - '91 Dodge Ram D-250 Le
90 day: 20.76 mpg (US)
Thanks: 208
Thanked 427 Times in 278 Posts
Edgarwit's
Are a prime example of a WOG( wing in ground effect.) Your front and rear fenders appears to lack the roughness you refer to being present preventing such research from applying to your specific or any use case with wheels. one of us has the wrong context
You challenge the community to find you a better airfoil profile the community responded, Your response to your challenge being answered,is the subject is not relevant do to roughness of automobiles?
I'll push you a very specific question. Witch one has the best chance of maintaining attached flow mounted 20-80% of cord off the sheet metal the GEO 222, NACA 4412, or the optimised NACA 4412



testing you proved your 222 was not the right design . at any angle of attack it cannot achieve attached flow Beyond 1/3-1/4 cord . I guess only functioning 25% is considered a great success to a "published professional". Imagine how much better your guide plains would function if you use the correct airfoil, preventing the added additional Dynamic frontal area caused by the seperation. ( I do acknowledge that they have already showen a reduction the factory Dynamic frontal area, your testing shows 66 to 75% has been left on the table. thank you for presenting us with the evidence, now follow through and make your changes necessary to get your best result unless you are satisfied with 25% )

Use case 2
Rear spoiler
This profile may give you much better results on your rear wing then a profile that is designed to be a multi element 360 degree angle of attack as used.
Unless you don't think the back of your Prius is smooth enough or there's no ground effect off your back glass before you wing.

Use case 3
Flat floor
Take me into account the pressure wave rebound and making the floor not quite so flat in a way to take advantage of this rebound energy that is demonstrated in the pressure and velocity graphs of this document that you say can never provide useful energy formation to wheeled vehicles.

Use case 4
Building a West coast-style mirror (old school tow mirror)that acts like your edger wits but at the A-piller.

Of course I can provide useful use cases for the presented paper cuz I presented it I saw useful I thought others obviously not you but others could benefit from the things I see

dump out a bucket of dots I'll draw you a picture, all one has to do is connect them
__________________
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


  Reply With Quote
The Following User Says Thank You to gumby79 For This Useful Post:
aerohead (05-27-2020)