IM-S-Timator®

Approximates IMS General Purpose Rating

10 Knots of Wind (GP10)

INPUT DATA:

I: J:

P: E:

LWL: DRAFT:

DISPLACEMENT(lbs):

RESULTS:

JIB: MAIN:

TOTAL SAIL AREA:

ESTIMATED IMS GP10 RATING:

ESTIMATE - 550:

The "IM-S-Timator®" is a work in progress and is primarily useful as a demonstration of Java Scripting capability. The "IM-S-Timator®" has no official status with any recognized or unrecognized organization and is unencumbered by warranties of any kind, expressed or implied.

That said, it is surprisingly accurate for about 90% of the boats it has been tested with. Results are frequently within plus or minus 12 seconds a mile. Major sources of inaccuracy include lack of data for hull shape, lifting surfaces, righting moment, pitching moment, rig weight and crew weight.

Special thanks and recognition to Terry Schell who developed the regression co-efficients for a PHRF estimator in 1996 and published the results in USENET group: rec.boats.racing

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