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Old 07-19-2018, 02:23 PM   #10 (permalink)
gumby79
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Join Date: Dec 2014
Location: Butte, Montana
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little jona - '91 Dodge D 250 first gen cummins LE
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90 day: 23.4 mpg (US)

Little Jona airo modded - '91 Dodge RAM 3/4 TON D 250 2×4 AUTO
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90 day: 20.24 mpg (US)

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If the louvers were v-shaped instead of straight then they may act like a step hull of a boat, reducing wetted area intern drag.
Making channels for the higher pressure on the sides to merge with the lower pressure center while minimizing disturbance of the front to back flow.
Im curious if the severe reduction in Reynolds number would mute any effect from this design in the air, or if the speed at which it works is too high for Road use.

Quote:
from https://www.boatingmag.com/stepped-h...hull-0#page-20

Step hulls reduce the amount of running surface in contact with the water by ushering a cushion of aerated water under the hull via one or more transverse indents known as steps (A).
The aerated water also exerts upward pressure (B) on running surfaces (C) to lift the hull, maintain a consistent trim angle and boost efficiency when the boat is on plane. All other things being equal, this can result in higher speeds — some estimates run 10 to 15 percent higher — versus a conventional V-hull.
__________________
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


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aerohead (07-21-2018)