WinGD X62DF-S2.0, Installation Manual

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Marine Installation Manual 2022-03 2-16
2 Engine Power and Speed
2.7 Prohibited operation area
X62DF-S2.0
Power/speed range for
CMCR [Rx] =
85 % R1
—
R2 speed
In Figure 2 - 9 , the engine’s CMCR speed is rated at 85 % of the R1
—
R2 speed. At
this speed, a minimum engine power (point F) of 10.4 % is required, below this is
the prohibited area of operation for the CPP at small (to zero) pitch and discon
-
nected propeller.
Point E is always defined at 70 % of the R1
—
R2 speed and has a minimum
power of 5.8 %, however in Figure 2 - 9 this equates to approximately 82 % CMCR
speed.
Figure 2 - 9 The prohibited operation area (CMCR speed = 85% of R1 — R2)
40 50 60 70 80 90 100
[rpm]
110
100
90
80
70
60
50
40
30
20
10
0
5 7 8
CMCR [Rx]
Field A
Engine speed
Engine power [% Rx]
[% Rx]
E
F
11
12
Prohibited operation area
10.4 [% Rx]
45.9 36.7 55.1 64.3 73.4 82.6 91.8
X62DF-S2.0
SM-0802