Air filled camelback for time trials.

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Kasparz
Posts: 609
Joined: Mon Jul 16, 2007 10:17 am
Location: Latvia

by Kasparz

Hello there!

I've been wondering about few pros using air filled camelbacks. Most of them are skinny men with flat backs. I was guessing skinnier men have relatively bigger head proportions to body thats why using camelbacks can improve aerodynamics. I'm a skinny men, Wiggins proportions really and looking to improve aerodynamics.

What's your guess?

TheRookie
Posts: 911
Joined: Wed Jan 18, 2012 4:23 pm
Location: Midlands, United Kingdom

by TheRookie

This is weight weenies, use Helium!

Otherwise no idea!
Impoverished weight weenie wanna-be!
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HillRPete
Posts: 2292
Joined: Tue Apr 12, 2011 8:08 am
Location: Pedal Square

by HillRPete

Kasparz wrote:I'm a skinny men, [...] and looking to improve aerodynamics.

If you do it without a means of verifying that it actually improves things (wind tunnel), chances are that you end up doing it in a way that increases drag.

Generally I thought being skinny would be advantageous to aerodynamics?

stevem
Posts: 15
Joined: Mon Oct 22, 2007 7:17 pm
Location: France

by stevem

If you look at pictures of Matt Bottrill in the Nat UK 25 TT he was wearing a camel bak on the front , was it air filled I do not know but strange for a 25 mile TT.
soulmates never die

dereksmalls
Posts: 2016
Joined: Tue Aug 02, 2011 9:20 pm
Location: New Zealand

by dereksmalls

Haven't the UCI banned the wearing of Camelbaks in the front? And they have to have water in therm or something otherwise it counts as an illegal fairing from memory

Kasparz
Posts: 609
Joined: Mon Jul 16, 2007 10:17 am
Location: Latvia

by Kasparz

Yes, at the front camelbacks are banned, but not at the back. I have a gap between my neck and helmet, just like Andy have here.

http://www.centralsportsnews.com/wp-con ... 202009.jpg

jo.k
Posts: 177
Joined: Fri Jan 09, 2009 11:39 pm
Location: Norway

by jo.k

Pull the helmet back a bit, then ...

HillRPete
Posts: 2292
Joined: Tue Apr 12, 2011 8:08 am
Location: Pedal Square

by HillRPete

Kasparz, interestingly Wiggins and others have started to use stubby tail helmets, so that gap might not be a problem really?

woz9683
Posts: 236
Joined: Sun Jul 11, 2010 6:58 pm
Location: MS, USA

by woz9683

They're using the stub-tailed helmets so that when they put their head completely down between their arms or glance down they don't have a big tail sticking up into the air. Keeping your head completely down with a stub-tail helmet lowers frontal area, but if you're going to keep your head up a long-tailed helmet should be more aero (just don't glance down with your whole head, only move your eyes).

As for camelbaks (camelfronts?), when your chest/abdomen is very flat it catches a lot of wind, rounding the surface with the camelbak helps redirect the air around the body.

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