better brakes

Ernest Montague afm199 at earthlink.net
Thu Sep 25 15:09:06 PDT 2008


Yup. At Bonneville a lot of faired bikes will start wheelspin at around 
200 mph as air drag overcomes traction available.  Another way to look 
at:  Drop a rock from an airplane at 25,000 feet or 5,000 feet, the 
terminal velocity in either case will be around 150-170 mph


On Sep 25, 2008, at 2:50 PM, Ilya A. Kriveshko wrote:

> Ah! Thanks, Richard, for confirming my computation, if not my assumed
> starting numbers.
>
> Now I need to learn to put the same amount of meaning into fewer words.
> --
> Ilya
>
> PS: In Russian, there is a slang term that roughly translates as 
> "verbal
> diarrhea." Anyone got some verbal Imodium?
>
> Kabara, Richard M. wrote:
>>  Jo, keep in mind that power goes with the cube (3rd power) of speed 
>> for aero drag. At those speeds, mechanical drag is a small percentage 
>> of total drag, assume it zero. Assume aero drag is the same for both 
>> bikes.
>>
>> These are ROUGH numbers for illustration:
>> GSX-R1000  150 rear wheel-hp  180mph top speed
>> SV650       70 rear wheel-hp  140mph top speed
>>
>> (180mph/140mph)^3 = 2.1
>>
>> 150hp/70hp      = 2.1
>>
>> So the GSX-R1000 has more than double the hp, but only goes ~30% 
>> faster than the SV...
>>
>> Mother Nature is a real bitch!
>> Rich
>>
>



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