SPEED TRIALS

SPEED TRIALS WITH 4 BLADE PROPS

NORMAL RUNNING BOTH ENGINES

NOMINAL RPM PORT RPM STBD RPM SPEED TTW PORT GPH STBD GPH TOTAL GPH NOMINAL NMPG
1200     5.7 1.3 1.1 2.4 2.38
1300 1298 1292 6.2 1.5 1.4 2.9 2.14
1400     6.9 1.9 1.6 3.5 1.97
1500 1520 1524 7.2 2.3 2.2 4.5 1.60
1600     7.7 2.6 2.4 5 1.54
1700     8.4 3.1 2.7 5.8 1.45
1800 1812 1823 8.6 3.7 3.4 7.1 1.21
1900     9.2 4.4 3.9 8.3 1.11
2000 2025 2029 9.4 5.1 4.7 9.8 0.96
2100     9.8 5.9 5.7 11.6 0.84
WOT 2200 2213 2205 10 6.9 6.8 13.7 0.73


RUNNING ON PORT ENGINE

  STARBOARD SHAFT DOGGED STARBOARD SHAFT FREEWHEELING ADVANTAGE FREEWHEELING FREEWHEELING COMPARED TO TWIN ENGINE RUNNING
NOMINAL RPM SPEED TTW PORT GPH NOMINAL NMPG SPEED TTW PORT GPH NOMINAL NMPG SPEED TTW NOMINAL NMPG SPEED TTW NOMINAL NMPG RANGE % INCREASE
1200 4 1.5 2.67 4.3 1.5 2.87 0.30 0.20 -1.4 0.49 20.70%
1300 4.4 1.8 2.44 5.1 1.8 2.83 0.70 0.39 -1.1 0.70 32.53%
1400 5 2.1 2.38 5.4 2.2 2.45 0.40 0.07 -1.5 0.48 24.51%
1500 5.5 2.6 2.12 5.7 2.6 2.19 0.20 0.08 -1.5 0.59 37.02%
1600 5.8 3 1.93 6.2 3.1 2.00 0.40 0.07 -1.5 0.46 29.87%
1700 6.1 3.5 1.74 6.4 3.7 1.73 0.30 -0.01 -2 0.28 19.43%
1800 6.6 4.1 1.61 6.9 4 1.73 0.30 0.12 -1.7 0.51 42.41%
1900 7 4.8 1.46 7.2 4.7 1.53 0.20 0.07 -2 0.42 38.21%
2000 7.4 5.6 1.32 7.7 5.5 1.40 0.30 0.08 -1.7 0.44 45.96%


RUNNING ON STARBOARD ENGINE

NOMINAL RPM SPEED TTW PORT GPH NOMINAL NMPG SPEED TTW PORT GPH NOMINAL NMPG SPEED TTW NOMINAL NMPG SPEED TTW NOMINAL NMPG RANGE % INCREASE
1200 4.1 1.2

3.42

4.4 1.2 3.67 0.30 0.25 -1.3 1.29 54.39%
1300 4.5 1.6 2.81 4.9 1.4 3.50 0.40 0.69 -1.3 1.36 63.71%
1400 4.9 1.9 2.58 5.4 1.8 3.00 0.50 0.42 -1.5 1.03 52.17%
1500 5.3 2.2 2.41 5.6 2.2 2.55 0.30 0.14 -1.6 0.95 59.09%
1600 5.7 2.8 2.04 6.1 2.5 2.44 0.40 0.40 -1.6 0.90 58.44%
1700 5.8 3.2 1.81 6.4 3 2.13 0.60 0.32 -2 0.69 47.30%
1800 6.2 3.8 1.63 6.7 3.5 1.91 0.50 0.28 -1.9 0.70 58.04%
1900 6.9 4.4 1.57 7.3 4.2 1.74 0.40 0.17 -1.9 0.63 56.81%
2000 7.3 5.3 1.38 7.6 5.1 1.49 0.30 0.11 -1.8 0.53 55.36%

 

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