DECKMASTER
TABLE 2-4
POWER REQUIRED CONDITIONS
Theoretical Drive Train Analysis
Levelwind Traveler Head to Electric Motor
1.0
SIDE LOAD
1,000 lb.
2.0
SPEED
Drum Speed
= 1.07 rpm
Hose Diameter
= 6.045 in. OD
Traveler Speed
= (6.045)(1.07) = 6.47 in/min
3.0
CHAIN DRIVE
Drive Sprocket Pitch Dia. = 6.68 in.
Efficiency = 0.75
Required Torque = (1000) (6.68/2) = 4,453 in-lb
0.75
Required Speed = 6.47 = 0.31 rpm (constant rate)
(6.68) (p)
Assume Required Rate to be 3 times the constant rate.
Required output speed of gearbox = (3)(0.31) = 0.93 rpm
4.0
GEARBOX
Eurodrive FAF70
Reduction Ratio = 69.31:1
Efficiency = 0.90
Required Input Torque (Motor Output) =
4453
= 71.4 in-1
(69.31)(0.90)
Required Input Speed (Motor Output) = (0.93)(69.31) = 64.5 rpm
2-10 *
