I've noted that the formula
P = (5.244820) * S + (0.01968) * S3
referenced on
http://www.kurtkinetic.com/powercurve.php
and
http://www.kurtkinetic.com/calibration_chart.php
does *not* agree with the table numbers in the PDF link on the top
of
http://www.kurtkinetic.com/powercurve.php.
In the PDF, for example, 22 MPH == 319.483,
but the formula gives 324.9387
I believe the right formula (if you believe the PDF) is:
P = (5.244820) * S + (0.0191676) * S3
This agrees with the PDF, and is mentioned on the bottom of the page of
http://www.kurtkinetic.com/history_fluid_machine.php
e.g.:
[5.24482 x (Ave. Speed in MPH)] + [0.0191676 x (Ave. Speed in MPH)³]=
So, if anybody cares, somebody should contact Kurt and say -
look - you've posted one equation on:
http://www.kurtkinetic.com/powercurve.php
http://www.kurtkinetic.com/calibration_chart.php
and another on
http://www.kurtkinetic.com/history_fluid_machine.php
and in their PDF table of wattages...
What is the real eqn?
For now, go with the conservative one using the 0191676 factor, which
will wipe off about 5 to 10 watts from the other formula for those of us avg'ing 300-350 watts...
In any case, I've powertapped the Kinetic, and find it to be in the ballpark, but still a rough approximation to actual power being produced
(see
http://groups.google.com/group/wattage/browse_frm/thread/5212d29b6176a019/aab146429d79d753?hl=en#aab146429d79d753
)
dave linenberg