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Front panniers?

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Old 12-09-15, 12:51 PM
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Squeezebox
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Front panniers?

Has anyone done wind tunnel tests on front racks and front panniers to see how much turbulence and drag they create?
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Old 12-09-15, 12:55 PM
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bwgride
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"Perhaps more surprising to many, front bags were more aerodynamic than rear ones. A handlebar bag was more aerodynamic than a Carradice saddlebag that extended just slightly beyond the hips of the rider (see photo at the top of this post). Front panniers (on low-rider racks) were more aerodynamic than rear panniers."


https://janheine.wordpress.com/2012/...world-bicycles




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Old 12-09-15, 12:59 PM
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indyfabz
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If you start yet a third thread on the subject you might get even more responses.
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Old 12-09-15, 01:43 PM
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I'm just speaking from my experience with front panniers. Not having ridden in a wind tunnel, but having battled many head winds; I have developed a premise that a quartering crosswind adversely affects the aerodynamic efficiency more than a straight on headwind.
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Old 12-09-15, 04:03 PM
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fietsbob 
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There was the Tailwind pannier set way back in the 80s , they were made to be aerodynamic to some extent..

'BentRider Online» Blog Archive » Angletech Techwind Panniers & https://www.flickr.com/photos/7289267@N06/3236672890

Who in the lumpen proletariat has access to a frikin wind tunnel , Dude

>> awaiting the checks to roll in to pay that rent to do your survey << I dont care, Its squeezeboxe's problem..

Knock Your self Out .. Publish your findings ..

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Old 12-09-15, 04:19 PM
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Originally Posted by bwgride View Post
"Perhaps more surprising to many, front bags were more aerodynamic than rear ones. A handlebar bag was more aerodynamic than a Carradice saddlebag that extended just slightly beyond the hips of the rider (see photo at the top of this post). Front panniers (on low-rider racks) were more aerodynamic than rear panniers."


https://janheine.wordpress.com/2012/...world-bicycles




I'm not reading anyone's stuff whose name is Hiney (even if it is the German spelling).
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Old 12-09-15, 04:20 PM
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Originally Posted by fietsbob View Post
There was the Tailwind pannier set way back in the 80s , they were made to be aerodynamic to some extent..

'BentRider Online» Blog Archive » Angletech Techwind Panniers & https://www.flickr.com/photos/7289267@N06/3236672890

Who in the lumpen proletariat has access to a frikin wind tunnel , Dude
Anyone has access they rent them all over the place.

UWAL - Wind Tunnel Testing at the University of Washington
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Old 12-09-15, 04:43 PM
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Here's what i'd do:



But with front panniers!

Last edited by BigAura; 12-09-15 at 04:48 PM.
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Old 12-10-15, 12:48 AM
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Front or rear panniers create much aero drag & cross-winds can be an esp bad problem. Sometimes it may work better to have 1 pair of panniers (to minimize cross-wind buffeting) vs front & rear panniers with otherwise better weight distribution.
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Old 12-10-15, 12:55 AM
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i like the 'drillium' on that big chainring.
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Old 12-10-15, 07:09 AM
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That's called ULUF touring (ultralight ultrafast for those of you who don't know). Weights are measured in micrograms. Wind tunnel testing is mandatory. ULUF tourers typically ride 300 mile days.
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Old 12-10-15, 08:49 AM
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What's one of the best shapes for aerodynamics? A wing:



Now picture a cyclist seen from above:



With front panniers, any turbulence runs along the body of the cyclist and his/her bike, instead of causing drag past the rear wheel. A pair of front panniers improves aerodynamics much more than any other configuration, including four panniers. Whether or not it's better than no panniers at all, I'd be interested to find out, since I know the rotating front wheel causes a lot of drag.
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Old 12-10-15, 11:53 AM
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i rode for a bit with low riders on a 26" wheeled bike and it seemed like there was kind of a ground effect with the panniers so low while descending and in a tuck. Maybe it was simply the panniers slowing things down but it seemed to me like the closeness to the ground added to it.
Since power to weight is a big factor climbing hills and not aerodynamics removing weight would be the best start. If ones output is great enough that aerodynamics comes into play on the flats it would make sense to eliminate panniers right off. Trying to get an aerodynamic pannier setup so you can descend at 35mph instead of 30mph is kinda silly.
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Old 12-10-15, 03:21 PM
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Ha! This thread is duplicated exactly right now somewhere else.
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Old 12-10-15, 06:34 PM
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Originally Posted by mdilthey View Post
What's one of the best shapes for aerodynamics? A wing:

of drag.
Its a great shape for lift.
I doubt its the best shape for aerodynamic drag.
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Old 12-10-15, 06:43 PM
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Originally Posted by boomhauer View Post
Its a great shape for lift.
I doubt its the best shape for aerodynamic drag.
Tell that to the World's Fastest Indian:


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Old 12-11-15, 12:09 AM
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Originally Posted by Doug64 View Post
I'm just speaking from my experience with front panniers. Not having ridden in a wind tunnel, but having battled many head winds; I have developed a premise that a quartering crosswind adversely affects the aerodynamic efficiency more than a straight on headwind.
I have noticed that also - not just on bicycles but motorcycles and other motor-driven vehicles as well, even when towing my old Airstream back in the day. I suspect the drag from both side and frontal gets added. At less than full value but still more than just head on or cross directional. One could probably work up a formula.
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Old 12-11-15, 09:35 PM
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Originally Posted by alan s View Post
That's called ULUF touring (ultralight ultrafast for those of you who don't know). Weights are measured in micrograms. Wind tunnel testing is mandatory. ULUF tourers typically ride 300 mile days.
That's exotic! Don't you have to know someone to get wind-tunnel time? ULUF folks would seem to also need to balance weight vs aero.
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Old 12-11-15, 10:24 PM
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Are you talking ULUF supported or unsupported?
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