kenton
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| posted on 14/11/10 at 11:28 AM |
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Fit a windscreen and more power!
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escary
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| posted on 14/11/10 at 12:32 PM |
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iv'e noticed this a well
on a bike there are several helmet types, head down and head level.
i have in the past given a helmet away as it was a level head hat and no use on a sportsbike, as i rode the bike i could only look through the upper
1/3rd 1/4 of the visor, i'd suggest a well fitting Arai as these tend to be a head down hat and should limit the upper lift.
only problem, arai hats are expensive and don't fit everyones head and nose shape.
best of luck
Regards
Ewan
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oadamo
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| posted on 14/11/10 at 01:24 PM |
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quote:
Originally posted by BigLee
Make a splitter out of plywood and glue it to the top of your helmet. That should help the airflow! Something A3 sized would be fine!!!
fpmsl
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Rob Palin
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| posted on 18/11/10 at 06:03 AM |
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As people have said, the helmet is lifting because the top surface of it is acting like an aeroplane wing. Shielding yourself from the wind with a
larger screen is one way of fixing it. Another is to fit a spoiler to the back of the helmet at the top to 'square-off' the otherwise
round shape. Race car helmets are often squared at the back like this, but it's harder to do for bike helmets because of the variations in
posture and because you're not supposed to have anything on the lid that can catch and snap your neck if you're rolling across the ground
in an accident. Nice.
The type of spoiler looks like this:
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wobblyone
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| posted on 26/1/11 at 02:47 PM |
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not sure its all down to a bike helmet, im more likely to think its a badly fitting lid, I raced bikes, then went on to 250 superkarts where your
head is always being pulled off and never had any helmet lift issues wearing various motorbike arai's over the years and we were in a real non
bike position with our heads no probs including averaging over 117mph at Thruxton and pushing 160 mph down the back straight with no windscreen etc,
just got neck ache 
if its a crap lid they can feel tight when you are stationary but add a 100mph and its a bit different. just my 10 cents )
adrenalin appears to be brown
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