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Thread: Calculate speed in a certain distance???

  1. #1
    Superbike Twin AMA187's Avatar
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    Calculate speed in a certain distance???

    IS IT POSSIBLE TO DETERMINE WHAT DISTANCE IT WOULD TAKE TO REACH 200MPH ON A TLR WITH DIFFERENT GEARING (SPROCKETS) I HAVE BEEN LOOKING AT GEARING COMMANDER.COM BUT FOR THE LANDSPEED ATTEMPT THEY ARE TIMING AT THE 1.0 MILE MARK AND THE 1.5 MILE MARK IM PRETTY MUCH AT SEA LEVEL FOR ELEVATION..I NEED TO DETERMINE WHAT GEARING WOULD BE BEST TO HIT 200MPH, I WOULD RATHER HIT IT AT THE 1 MILE MARK ANY IDEAS ?? THANKS

  2. #2
    Silver Subscriber The Ring-In's Avatar
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    you need to know the power of the motor . the frontal area and the coefficient of friction.

    there are formulas on the internet ....use google.

    do some runs over a shorter distance and compare your results with tose of the formula and from this you can work out the variation in the values you are working with .

    then you can use this data to extend your calcs to the 200mph mark.

    if your target speed is 200mph then you can work the rolling diameter of the rear wheel and the peak revs and the gear box in top gear . then work the final ratio to suit.

    from here you can calculate the power required to run at this speed .

    achieving this speed in a certain time /distance requires much more power and a different formula

    but you get the idea


    cheers stu

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  3. #3
    Evil Twin Juzz976's Avatar
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  4. #4
    Superbike Twin AMA187's Avatar
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    Thanks will look on line

  5. #5
    Superbike Twin AMA187's Avatar
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    Thanks

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