Hey Dale,
I'm going to be "chin-down" at speed too, which is why I'm more concerned
about vents on the back. I was looking at a Shoei RF-900 which has lots of
vents all over, plus a little spoiler sticking out the back that I'd
probably cut off. On the other hand, it looks like the cheaper Snell-rated
helmets have less in the way of vents and might work better for a speed
trial. Not having run at El Mirage or the Bonneville Salt Flats before, I
was also wondering if there is any advantage having some ventilation. I
know it gets really hot but I'll only be wearing the thing for a few
minutes at most, right?
My bike still a work in progress while I'm bringing my welding skills up to
par, but will eventually be an electric motorcycle built to conform to the
APS-class requirements. I guess it'd be in what's listed as the APS-Omega
class, but it looks like I'll be running against the E/1 record. Other
details: Optima yellow-top batteries, snowmobile CVT transmission, one
really beautiful forklift series-wound DC motor, an electronic controller
(yet to be determined), some contactors, lots of thick copper wire,
FZR-1000 wheels and brakes, with a bunch of steel tubing holding it all
together. Eventually I'll have some kind of streamlining, too.
Henry Deaton
SF, CA
At 04:19 PM 3/11/2001 -0500, you wrote:
>Hello Henry, regarding vents on helmets, I use a Shoei, it has a vent at the
>chin area and a vent above the visor. Looking at my helmet, I don't believe
>the chin vent will hit any wind at speed, my chin is nearly on the tank. The
>visor vent is streamlined pretty well. If anything, the visor vent may
>introduce enough turbulence to trip the air going over the top, helping to
>fill the turbulent area behind the helmet. Keith? your area...
>Here's what does make a difference on vented vs non vented helmets;
>fogging. Vented helmets seem to have more control over the fogging of the
>lens, with or without the fog-x type treatments.
>
>and when you have a minute whutta ya riding Henry?
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