Join Date: Jun 2010
Location: NW,Oregon Coast
Mentioned: 9 Post(s)
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Force 10+ Gale as head wind, air speed can be 60 MPH ,
while you walk the bike because your ground speed is so difficult
you fall over if you try pedaling the bike.. ground speed zero, or backwards.
No formula needed, I live on the coast, and winter storms can arrive
with a vengeance.
Winter off SW Irish Coast, they are as strong or stronger
coming off the North Atlantic.
Air speed/ ground speed is an Airplane issue..
In a Boat , if the tide is coming in and you want to go out, right then,
and the water is moving against you.
probably better to drop the hook and wait a while.
Last edited by fietsbob; 01-10-11 at 01:08 PM.