Bow Thrusters

Fixed pitch propeller bow
thruster
Control pitch propeller
bow thruster
Layout reference

Rudder Propeller

Main components
Installation Type
Specifications Model

Main Controllable Pitch Propeller

SJMP>>Product
Rudder propeller series models

Type

JYD12RP
JYD50RP
JYD10RP
JYD15RP
JYD30RP
JYD35RP

JYD33RP

JYD55RP
JYD101RP
JYD121RP
MAX.Input Power kW
45
110
200
315
480
490
630
900
1250
1650
MAX.InputTorqueN.m(Sf=1)
200
420
850
1675
2800
5200
3300
5423
14740
19500
MAX.Input Speed r/min
2300
2500
2350
2000
1800
1000
1800
1800
1000
1000
Reduction Ratio
i
1.93
2.5
2.68
3.46
3.96
2.20
4.04
5.059
3.257
3.58
i上upper
1.7
1.64
1.65
1.53
1.63
0.9032
1.53
1.647
1.286
1.286
i下lower
1.13
1.52
1.62
2.26
2.43
2.43
2.64
3.071
2.533
2.79
Propeller Diameter mm
MAX
450
750
940
1100
1500
1500
1500
1800
2100
2350
MIN
 
 
710
910
1250
 
 
 
 
 
PAL Length mm
MAX
2250
2800
2800
4250
4750
4750
5000
 
 
 
MIN
350
875
980
1400
1750
2000
1700
2600
2800
3000
Weigt(incl.Propeller and oil at PAL min)kg
70
200
320
1400
2200
3600
2850
5900
11100
17000
Per 100mm extension kg
10

12

21
42
43
43
50
 
 


Max input torque of Rudder Propeller decided capacity of its trasmit power of prime mover the kind of Rudder propeller operation, the type prime mover or the sort of vessel may influence the actual allowable input torque figure.It is recommended to consult with our technical staff before selecting the definite Rudder Propeller size.As for the selection of the right Rudder Propeller, the output torque Mp of the prime mover (gencral diesel engine,hydraulic or electric motor)is the most important factor and is calcunlated as follows:

Nm  (Output torque of prime mover in Nm)

     (Rudder Propeller service factors)

Nm  (Max input torque of Rudder Propeller in Nm)

kW  (Output power of prime mover in kW)

r/min (Input speed of Rudder Propeller in r/min)

Each type Rudder propeller has a specific allowable design torque,according to incorporating the normal engineering safety safety factors.In our many years experience wen have consider that this design torque cannot be the last word in the selection procedure.Serious consideration has to be given to the various service conditions,resulting in a service factor Sf with the nominal design torque has to be corrected.So that.

SJMP Ruder Propeller service factors do include the regulations of classification societies for normal operation.For ice-class DRP-type service required factors have to be between 0.33and 0.67.

The definite factors for special installation have to be defined by SJMP.

Sf=0.75:Full power continuous rating 24 hours service (container ships,push tugs)

Sf=0.9: Intermittent service with eventual full load (harbor tugs,floating crane)

Sf=1.00: Auxiliary installations (tunnel thruster,Dp-installations)

fz

Number of operating hours per year

1.00

Up to 3000hours

0.95

3000~5000hours

0.90

Ouer 5000hours

fl

Load condition

1.00

Intermittent Load

0.95

Up to50%full load

0.90

Continuous full load

fo

Overload condition

1.00

No engine overload

0.95

Engine overload 10%

0.90

More than 10% overload

fs

Field of operation

1.10

Dynamic positioning 

1.00

Inland waterways

0.95

Inland waterways with limited depth

0.95

Limited field of operation

0.90

Unlimited field operation


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