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I was waiting for someone qualified to say it. Coast down gives you the
combined drag....aero, tires,bearings,etc. It is my opinion that the closer
you can get to the speed you need to run the better the data will be. The
higher the speed the higher the aero percentage. Areo drag = the speed squared.
The bearing drag does not increase nearly as fast as aero as speed goes up. Not
sure about tires...think it is more proportional to speed. Hey Mayf...help me
out here before I get in over my head.
Glenn
Skip Higginbotham <saltrat@pro-blend.com> wrote:John, I believe that
coast-down will give you much more than a wind tunnel.
All you get in a tunnel is the aero component of drag. Coast-down gives you
all of the drag effects at once. So then any change that you make that has
multiple impacts on drag (body, gears, tires, trans, engine?) will be taken
into consideration. You just can't seperate them easily. But who cares????
Skip
At 05:58 PM 1/28/03 -0500, John Beckett wrote:
>Would relative testing show the same results (improvement or lack there of)
>weather in a wind tunnel or on the coast down?
>
>JB
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