WinGD X72DF - Line 5 Coefficients; Line 6 Coefficients

Marine Installation Manual 2021-08 2-8
2 Engine Power and Speed
2.5 Power range limits
X72DF
Table 2-1 Line 5 coefficients
Formula 2-5
where:
P ............... = selected engine power [kW]
P
CMCR
....... = CMCR engine power [kW]
n ............... = selected engine speed [rpm]
n
CMCR
....... = CMCR engine speed [rpm]
C2/C1/C0 .. = coefficients /constants
The area formed by Lines 1, 3, 5 and 9 is the range within which the engine
should be operated.
The area limited by Line 7, Line 9 and Line 3 is recommended for continuous op-
eration.
The area between Line 7 and Line 5 is reserved for acceleration, shallow water
and normal operational flexibility. If a PTO is installed, then the operating char-
acteristics of the engine will differ (see section 2.6,  2-10 for further details re-
garding PTO characteristics).
Overload Power Range
Line 6, Line 2 and Line 13 form the curve for the engine’s overload power limit,
as defined by Formula 2-5. Each component is governed by different coefficients
(see Table 2-2).
Table 2-2 Line 6 coefficients
Line no. Range (n /n
CMCR
) C2 C1 C0
Line 5 0.00 - 0.40 0.000 0.500 0.000
0.40 - 0.60 0.500 0.300 0.000
0.60 - 0.96 1.111 - 0.067 0.000
Line 1 0.96 - 1.00 0.000 1.000 0.000
Line 9 1.00 - 1.08 0.000 0.000 1.000
2
210
CMCR CMCR CMCR
Pn n
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Pn n
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Line no. Range (n /n
CMCR
) C2 C1 C0
Line 6 0.00 - 0.40 0.000 0.600 0.000
0.40 - 0.60 0.330 0.468 0.000
0.60 - 0.96 1.110 0.000 0.000
Line 2 0.96 - 1.032 0.000 1.066 0.000
Line 13 1.032 - 1.08 0.000 0.000 1.100