Generally we ran the boat at 1500 to 1550 RPM. Days later I

While cruising the Diesel Duck 462-1 in the Philippines in April of this year I made the following observations. We did not have any sails set. One day while at the helm I conducted a test of fuel consumption at different RPM settings. The wind was two to four knots on our starboard beam and Victor, our Filipino captain, said the current where we were was insignificant. The results are as follows based on SOG, RPMs and the flow scan gauge. I would set the RPM and give the boat five minutes to adjust before taking the numbers. Generally we ran the boat at 1500 to 1550 RPM. Days later I noticed 2.5 GPH readings at this RPM so current may have indeed had an affect on the SOG, or, the flow scan may not be accurate. Anyway these were my observations. RPM Knots Fuel GPH 1250 6.6 1.9 1300 6.7 2.0 1350 7.0 2.3 1400 7.1 2.4 1450 7.3 2.8 1500 7.5 3.8 1550 7.7 4.0 1600 7.7 4.1 1650 7.8 4.2 1700 7.9 4.3 1750 8.0 4.7 1800 8.1 5.0 1850 8.4 5.6 1900 8.5 5.8 Randal Johnson Phone 540-362-8499 www.roanokewreckrepair.com www.Seahorseyachts.com MV Dora Mac 462-5 Under Construction