DECKMASTER
Table 2-2
POWER AVAILABLE CONDITIONS
Theoretical Drive Train Analysis:
Electric Motor to Winch Drum
1.0
ELECTRIC MOTOR
30 Horsepower
1750 RPM
Efficiency = 0.91
2.0
HYDRAULIC PUMP
Sundstrand No. 20-2065-HDC
Rated Pressure
= 3000 PSI
Flow @ 1750 RPM
= 14.6 GPM
= 3,373 in3/min
Efficiency: Volumetric
= hV
= 0.95
Overall
= hOA
= 0.95
SET System Pressure @ 2150 PSI
Power Consumed
(2150) (14.6)
=
(1714)(0.95)
= 20.3 Horsepower
3.0
HYDRAULIC MOTOR
TRW ROSS No. MAB-10-0-02-A1
Displacement 7.4in3/Rev.
Efficiency: Volumetric
= hV
= 0.92
Torque
= hT
= 0.87
Overall
= hOA
= 0.80
Torque = 118 in-lbs/100 PSI (theoretical)
Assume 300 PSI system pressure drop
Output Torque = (2150-300) (1.18) (0.87)
= 1,899 in-lbs
Output Speed (3373) (0.92)
7.4
= 419 RPM
4.0
BRAKE
AUSCO No. 31025
Rated Torque = 3,800 in-lbs
2-5
