06-24-2015, 04:37 PM
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#11 (permalink)
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Master EcoModder
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human-powered performanc chart,IHPVA
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Last edited by aerohead; 06-24-2015 at 04:39 PM..
Reason: add
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06-24-2015, 05:57 PM
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#12 (permalink)
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Master EcoModder
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Note that the Zzipper crouch (line 6) and the Easy Rider recumbent (line 7) have the same CdA of 2.9 so you can get the benefit either way. Aero bars are quite comfortable as are recumbents.
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06-25-2015, 12:13 AM
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#13 (permalink)
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Cyborg ECU
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This list you posted and the article I started the thread with, aerohead, seem to agree that the small front fairing is helpful. But the Bicycle Quarterly article seems to think it is less beneficial than the list you posted. Probably different designs and testing parameters, yes?
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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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06-25-2015, 05:33 PM
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#14 (permalink)
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Master EcoModder
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different?
Quote:
Originally Posted by California98Civic
This list you posted and the article I started the thread with, aerohead, seem to agree that the small front fairing is helpful. But the Bicycle Quarterly article seems to think it is less beneficial than the list you posted. Probably different designs and testing parameters, yes?
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We know that the IHPVA listed the Zipper as the fairing they tested.While increasing frontal area,from 3.9,to 4.1 sq-ft,it reduced the drag factor from 3.2,to 2.9 sq-ft.
I'm uncertain what Bicycle Quarterly tested.Somehow I missed something?
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06-25-2015, 06:25 PM
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#15 (permalink)
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Cyborg ECU
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Quote:
Originally Posted by aerohead
We know that the IHPVA listed the Zipper as the fairing they tested.While increasing frontal area,from 3.9,to 4.1 sq-ft,it reduced the drag factor from 3.2,to 2.9 sq-ft.
I'm uncertain what Bicycle Quarterly tested.Somehow I missed something?
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One photo in the Bicycle Quarterly piece seems to show a weird hodge-podge kinda little fairing not completely unlike the zipper... I think they were manipulating its shape a lot... I bet it is cardboard and duct tape! Haha.
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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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06-25-2015, 06:34 PM
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#16 (permalink)
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Master EcoModder
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one photo
Quote:
Originally Posted by California98Civic
One photo in the Bicycle Quarterly piece seems to show a weird hodge-podge kinda little fairing not completely unlike the zipper... I think they were manipulating its shape a lot... I bet it is cardboard and duct tape! Haha.
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I did see that,and in my mind,it didn't even qualify as a 'fairing'.
It's like a flea on an elephant. 
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06-25-2015, 07:40 PM
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#17 (permalink)
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Cyborg ECU
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I think that do not knowwhat the zipper fairing looks like.
EDIT: Aha! Much different.
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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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