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SETTINGS.TXT
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1993-04-15
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POWER SETTINGS
TORQUE SETTING FOR MTOP- RTOP and MCP (Fleet Mean Engine Performance)
The engine torque settings required for MTOP (= Maximum Take-Off Power),
RTOP (= Reduced Take-Off Power) and MCP (= Maximum Continuous Power) are
identified below.
ENGINE RATING RESERVE
POWER SYSTEM
MTOP, up to 70 knots IAS Not Armed
or Armed
MTOP, at 110 knots IAS Not Armed
or Armed
RTOP, at 110 knots IAS Operating
MCP up to 15,000 feet
pressure altitude at
110 knots IAS
Maximum Take-Off Power (MTOP) up to 70 KNOTS IAS (all engines)
For take-off, advance the power lever to achieve at least 90% Ng with 1,675
PRPM selected before releasing the brakes. Thereafter, set torque required
for MTOP within 5 seconds of releasing brakes. If applicable, confirm that
the reserve power system is armed. If the required torque is not achieved at
70 knots IAS during the take-off run, the take-off may have to be abandoned
because in this case the scheduled performance is unlikely to be achieved.
For a rolling take-off where the power lever is advanced from Flight Idle,
the required torque should be confirmed within 10 seconds of advancing the
power levers.
MTOP AT 110 KNOTS IAS (all engines)
The torque for MTOP at 110 knots, with the reserve power system armed or not
armed as appropriate, is presented for the purpose of setting power in
flight during normal operation at speeds in the region of 110 knots IAS.
Reduced Take-Off Power (RTOP) AT 110 KNOTS IAS
The torque for RTOP (reserve power system operating or set manually) at 110
knots IAS, is presented for the purpose of confirming power settings at
speeds in the region of 110 knots IAS
MCP UP TO 15,000 FEET AT 110 KNOTS IAS (one engine inoperative)
The torque for MCP at 110 knots IAS is presented for pressure altitude up to
15,000 feet.
Maximum Take-Off Power (MTOP) up to 70 knots IAS
OAT in -40 -30 -20 -10 0 10 20 30
Celsius
------------------------------------------------------------------
Pressure TORQUE LB/FT
altitude in
feet
------------------------------------------------------------------
- 1,000 3,608 3,608 3,608 3,608 3,608 3,608 3,608 3,575
0 3,608 3,608 3,608 3,608 3,608 3,608 3,608 3,575
1,000 3,608 3,608 3,608 3,608 3,608 3,608 3,608 3,560
2,000 3,608 3,608 3,608 3,608 3,608 3,608 3,608 3,435
4,000 3,608 3,608 3,608 3,608 3,608 3,608 3,465 3,190
6,000 3,608 3,608 3,608 3,608 3,608 3,455 3,210 2,945
8,000 3,608 3,608 3,608 3,608 3,430 3,180 2,945 2,700
10,000 3,365 3,450 3,410 3,315 2,915 3,150 2,700 2,470
------------------------------------------------------------------
Maximum Take-Off Power (MTOP) at 110 knots IAS
OAT in -40 -30 -20 -10 0 10 20 30
Celsius
------------------------------------------------------------------
Pressure TORQUE LB/FT
altitude in
feet
------------------------------------------------------------------
- 1,000 3,680 3,680 3,680 3,680 3,680 3,680 3,680 3,650
0 3,680 3,680 3,680 3,680 3,680 3,680 3,680 3,650
1,000 3,680 3,680 3,680 3,680 3,680 3,680 3,680 3,580
2,000 3,680 3,680 3,680 3,680 3,680 3,680 3,680 3,550
4,000 3,680 3,680 3,680 3,680 3,680 3,680 3,590 3,300
6,000 3,680 3,680 3,680 3,680 3,680 3,630 3,325 3,060
8,000 3,680 3,680 3,680 3,680 3,530 3,350 3,060 2,810
10,000 3,420 3,510 3,465 3,420 3,080 3,250 2,810 2,580
------------------------------------------------------------------
Reduced Take-Off Power (RTOP) at 110 knots IAS
OAT in -40 -30 -20 -10 0 10 20 30
Celsius
------------------------------------------------------------------
Pressure TORQUE LB/FT
altitude in
feet
------------------------------------------------------------------
- 1,000 4,100 4,100 4,100 4,100 4,100 4,100 4,100 4,100
0 4,100 4,100 4,100 4,100 4,100 4,100 4,100 4,100
1,000 4,100 4,100 4,100 4,100 4,100 4,100 4,100 4,100
2,000 4,100 4,100 4,100 4,100 4,100 4,100 4,100 4,045
4,000 4,100 4,100 4,100 4,100 4,100 4,100 4,045 3,760
6,000 4,100 4,100 4,100 4,100 4,100 4,055 3,750 3,480
8,000 4,100 4,100 4,100 4,100 3,925 3,735 3,450 3,200
10,000 3,785 3,875 3,830 3,780 3,440 3,615 3,170 2,940
------------------------------------------------------------------
Maximum Continuous Power (MCP) at 110 knots IAS
OAT in -40 -30 -20 -10 0 10 20 30
Celsius
------------------------------------------------------------------
Pressure TORQUE LB/FT
altitude in
feet
------------------------------------------------------------------
- 1,000 3,680 3,680 3,680 3,680 3,680 3,680 3,680 3,680
0 3,680 3,680 3,680 3,680 3,680 3,680 3,680 3,680
1,000 3,680 3,680 3,680 3,680 3,680 3,680 3,680 3,680
2,000 3,680 3,680 3,680 3,680 3,680 3,680 3,680 3,680
4,000 3,680 3,680 3,680 3,680 3,680 3,680 3,680 3,550
6,000 3,680 3,680 3,680 3,680 3,680 3,680 3,540 3,305
8,000 3,680 3,680 3,680 3,680 3,680 3,550 3,260 3,040
10,000 3,680 3,680 3,680 3,635 3,455 3,275 3,010 2,805
12,000 3,495 3,550 3,570 3,355 3,195 3,035 2,780 --
15,000 3,095 3,130 3,170 2,985 2,840 2,695 2,475 --
------------------------------------------------------------------
This information is based on data received directly from the manufacturer of
the aircraft, Short Brothers PLC in Belfast, Northern Ireland, UK.
Mr. COWAN, Headquarters Engineer, has been most helpful in providing the
necessary data to the author.
Juergen H. Vollmer, Compuserve ID: 100014,330