Template for Reporting Performance Data

Optimizing the performance of Boston Whaler boats
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jimh
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Template for Reporting Performance Data

Postby jimh » Thu Jul 31, 2025 11:45 am

When reporting performance data, the following template may be useful in composing the report:

BOAT INFORMATION:
  • Year
  • Family
  • Model (length)
  • Transom configuration
  • estimated total boat weight
Example: 1990 OUTRAGE 22 Notched Transom, 4,500-lbs

ENGINE INFORMATION:
  • Model Year or Production Epoch
  • Manufacturer
  • HP
  • Shaft length
  • Gear Ratio
  • Engine mounting height expressed in holes-raised-above-lowest-possible-position
  • Full model code identifier
  • Optimum full-throttle engine speed RPM range
  • Maximum engine speed ROM
Example: 2010 E-TEC 225-HP, 25-inch-shaft, 1.845:1 gear ratio, mounted one-hole-up, E225DPXISE, Optimum WOT engine speed 5500 to 5700-RPM, 5800-RPM maximum.

PROPELLER INFORMATION:
  • Brand
  • Model
  • number of blades
  • material
  • diameter
  • pitch
  • particulars
Example: Mercury MIRAGEplus three-blade, stainless steel, 15.5-inch diameter, 17-pitch, PVS vents plugged, SOLAS rubber hub RBX-100 aluminum

ENVIRONMENTAL INFORMATION:
  • Water temperature
  • Water salinity
  • Air temperature
  • Air relative humidity
  • Wind speed and relative direction to course
  • Wave height
  • Water current and relative direction to course
Example: 73-degree freshwater, 68-degree humid air, downwind in 1 foot wind waves, minimal current effects.

INSTRUMENTATION:
  • Engine speed measurement source, unit of speed used, and estimated resolution
  • Boat speed measurement source for RPM and estimated resolution.
Example: Engine speed from digital tachometer with data directly from engine via NMEA-2000 ±50-RPM; boat speed from GNSS receiver with ± 0.5-MPH.

DATA recorded:
  • engine speed RPM
  • boat speed in specific units where MPH in statute miles per hour in highly preferred and units in nautical miles per hours is an discouraged alternative
  • particulars
Example: 5700 RPM produced 40-MPH boat speed into headseas and headwinds

DATA calculated:
  • SLIP
  • Fuel economy

COMMENTS
Any observations that could affect the results, such as amount of fuel on board, number of people, amount of gear, canvas stowed or deployed, etc.

Example:two adults aboard, half-full fuel tank, minimal gear, Bimini stowed in upright position.
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