Application Power Calculation - Honda G100K2 Applications Manual

Use the following formulas to calculate the approximate maximum horsepower of the engine to drive a given
application.
COMPRESSOR
Air displacement (l/min) x maximum pressure (bar) = Max. engine power (HP)
747
GENERATOR
Max. power output alternator (kVA) x 1.34 = Max. continuous engine power (HP) = Max. engine power (HP)
Alternator efficiency 0.8
CENTRIFUGAL WATER PUMP
Capacity (l/min) x total head (m) x 0.38 x 50 mm/pump outlet diameter (mm) =
Max. continuous horsepower (HP) = Max. engine power (HP)
0.85
HIGH PRESSURE PUMP – HYDRAULIC PUMP
Pressure (bar) x capacity (l/min) = Max. engine power (HP)
440 x η
ROTARY MOWERS
Guideline for walk behind lawnmower
Cutting width: 42 cm - 2.6 HP
46 cm - 3.5 HP – 5 HP
47 cm - 4.5 HP - 5 HP
53 cm - 4.5 HP – 5.5 HP
Guideline for ride-on mower
Cutting width: 76 cm - 11 HP
97 cm - 13 HP
102 cm - 13-14 HP
105 cm - 16 HP
120 cm - 20 HP
0.85
1980
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APPLICATION POWER CALCULATION

η = 0.6 (water)
η = 0.7 (oil)