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Old 12-12-2016, 09:15 PM   #21 (permalink)
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mine for comparison. tilted way back on the wheel more like a parachute..

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Old 12-12-2016, 09:37 PM   #22 (permalink)
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I am surprised that nobody has mentioned the green box (transponder I assume) cable-tied to the front forks. That would cause a nice lot of turbulence and could also affect cooling.

I would consider flattening and bending the "beak" of the front fender downwards to reduce air getting under it. Also, what are the cable loops on the lower right of the bike?

Also, have you tuft tested the front fairing? I think the sculpting in the center that is covered by the racing number could be tuned a bit - maybe the number might have to be stretched across tighter to reduce the "valleys".

At the speeds you are talking about, these small details may all add up to something significant.

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Old 12-12-2016, 09:44 PM   #23 (permalink)
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little jona - '91 Dodge D 250 first gen cummins LE
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90 day: 23.4 mpg (US)

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Aerodynamic Streamlining Template
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Ill have to track down the quotes. I think it may have ben in Aerodynamic Streamlining Template: Part-C
You are more interested in the top view. . The 0 point would be your elbows.
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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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Old 12-12-2016, 09:47 PM   #24 (permalink)
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A bit of a tongue in cheek one here - have you considered body modifications like narrowing your shoulders?

Getting more serious, some of the tabs and stuff on the shoulders of your leathers will also trip up the air flow. Smoothing them with the "sharkskin" type finish may also help.

Simon
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Old 12-13-2016, 07:52 PM   #25 (permalink)
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You are right, that is my transponder. The position is not mandated, I could experiment with mounting it somewhere higher inside the fairing. Would have to test if that causes timing errors from obstructions..

I am not sure what you see as cable loops, but maybe you are looking at brake lines or throttle/clutch cables?

I could find a way to de-sculpt that transition from bodywork to windscreen. It's like that as a yamaha styling.

Quote:
Originally Posted by LittleBlackDuck View Post
I am surprised that nobody has mentioned the green box (transponder I assume) cable-tied to the front forks. That would cause a nice lot of turbulence and could also affect cooling.

I would consider flattening and bending the "beak" of the front fender downwards to reduce air getting under it. Also, what are the cable loops on the lower right of the bike?

Also, have you tuft tested the front fairing? I think the sculpting in the center that is covered by the racing number could be tuned a bit - maybe the number might have to be stretched across tighter to reduce the "valleys".

At the speeds you are talking about, these small details may all add up to something significant.

Simon
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Old 12-13-2016, 08:03 PM   #26 (permalink)
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For narrowing shoulders, are you referring to positioning or body composition?

I am a bit reluctant to attempt to modify the suit- it's $2000 of aussie roadkill and composite armors.


Quote:
Originally Posted by LittleBlackDuck View Post
A bit of a tongue in cheek one here - have you considered body modifications like narrowing your shoulders?

Getting more serious, some of the tabs and stuff on the shoulders of your leathers will also trip up the air flow. Smoothing them with the "sharkskin" type finish may also help.

Simon
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Old 12-13-2016, 08:13 PM   #27 (permalink)
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Is this worth doing?
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Old 12-13-2016, 08:14 PM   #28 (permalink)
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Is this one available as a transparent overlay? I am only finding the side view

Quote:
Originally Posted by gumby79 View Post
Aerodynamic Streamlining Template
Attachment 21045
Ill have to track down the quotes. I think it may have ben in Aerodynamic Streamlining Template: Part-C
You are more interested in the top view. . The 0 point would be your elbows.
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Old 12-18-2016, 10:48 PM   #29 (permalink)
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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

Would this help?
__________________
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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Old 12-19-2016, 01:33 AM   #30 (permalink)
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Btw, that vid of you on the track was impressive. good luck.

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See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.



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