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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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Last 3: 24.65 mpg (US)

Little Jona airo modded - '91 Dodge RAM 3/4 TON D 250 24 AUTO
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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 ,16cm turbo housing ehxsost manafulld wrap, Aero Tonto
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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.

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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
Last 3: 24.65 mpg (US)

Little Jona airo modded - '91 Dodge RAM 3/4 TON D 250 24 AUTO
Pickups
Team Cummins
90 day: 22.62 mpg (US)
Thanks: 126
Thanked 193 Times in 134 Posts

Would this help?
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1st gen cummins 91.5 dodge d250 ,16cm turbo housing ehxsost manafulld wrap, Aero Tonto
best tank: distance 649gps mi 24.04 mpg 27.011usg
Best mpg : 29.3mpg 97mi 3.311usg 7/27/16



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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 my car's mod 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. My fuel economy goal is 55+ mpg while averaging posted speed limits. See my Honda manual transmission specs post too.

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