I recall seeing a magazine test where the cooling was BETTER with
some helmets than no helmet at all.
Makes sense:
- catches extra air, since bigger
- can direct air to the hottest skin places
- can direct air to otherwise sheltered parts of the head and neck
- provides shade
Tom
On Friday, July 13, 2001 at 9:46, Plumb, Nadia <[EMAIL PROTECTED]>
wrote on "FW: [obc] TdF TTT," saying..
...
> I do not have a definitive answer. In the past, I have made wind tunnel
> tests on helmets and the streamlined ones offer a small drag reduction.
> However, the opposing issue was always head cooling. The streamlined
> helmets may not ventilate as well as regular helmets, and clearly not as
> well as no helmet, so riders may forgo the small drag reduction for the
> better cooling. Since such a large volume of blood goes to the head, lack
> of head cooling may impair performance more than the small drag reduction
> aids performance. It is probably a close call made by individual riders,
> explaining the lack of consistency even on one team.
>
> I hope this opinion is helpful.
>
> Kevin Cooper.
...
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