FP-2 T-44 Ops Limits
description
Transcript of FP-2 T-44 Ops Limits
FP-2FP-2
T-44 Ops LimitsT-44 Ops Limits
Overview• System Limitations
• Propeller Limitations
• Starting Limitations
• Engine Limitations
• Airspeed Limitations
• Miscellaneous Limitations
Instrument MarkingsInstrument Markings
Limit above or below which continued operation is likely to cause damage or shorten life
Safe or normal range of operation
Special attention should be given…Operation is permissible, but should be avoided
Power Definitions
Max Allowable
Max Continuous
Cruise Climb
Cruise
Max power available from the engines for takeoff. Time limited to 5 minutes.
Max power available from the engines not time limited. Intended for emergency use.
The maximum power approved for a normal climb.
Power required to maintain level flight at a desired altitude and normal airspeed. Cruise power will vary w/ altitude & airspeed.
Propeller Limitations
Propeller RPM (N2)
Normal:
Maximum:
Acceleration:
Max Reverse:
Idle:
Overspeed Test:
Overspeed Gov:
Fuel Topping:
1800 - 2200 RPM
2200 RPM
2420 RPM (2 sec)
2100 RPM
1900-2100 RPM --> resets overspeed gov
900-1100 RPM --> else low pitch torque check
Note: N2 limits are NOT propeller limitations, but instead
correspond to stress limits of the engine power section
2288 +/- 40 (4%)
2332 RPM (6%)
Starter Limitations
Starting Limitations
Min VDC for APU Charge
Min VDC for APU Start
Min VDC for Batt Start
Starter Cycle:40 sec on, 60 sec off40 sec on, 60 sec off40 sec on, 30 min off
18 VDC
20 VDC
22 VDC
Start ITT Limitations
1. ITT ____ deg C for __ seconds
-- ITT approaches ___ deg C
-- Stop start, check BATT, APU start?
-- Report temp & duration if > 925 deg C
2. ITT on operative engine approaches ___ deg C
-- Stop start
-- Reset N1 to 85 percent & reattempt the start
1090 2
925
790
Engine Limitations
Engine Torque
Note 1: Torque limits between 1900 and 2200 RPM vary linearly between 1315 and 1520 Ft-Lb
Max Allowable
Max Continuous
Cruise Climb
Cruise
Acceleration
5 Minutes
Continuous
Continuous
Continuous
2 Seconds
1315
1315
1315
1315
RPM 2200
RPM 1900
1520
1520
1520
Condition Max Time
2100
1315
1315 1520
1315 1520
1315 1520
2100
ITT
Note 1: High ITT in Lo-Idle may be decreased by reducing accessory load and/or increasing N1 speed
Note 2: High gen loads at low N1 speeds may cause the ITT acceleration temp limit to be exceeded. Observe the generator load limits for specific N1 speeds (See chart in NATOPS, pg. 4-5).
Max AllowableMax ContinuousCruise ClimbCruiseLo-IdleStartingAccelerationMax Reverse
5 MinutesContinuousContinuousContinuousContinuous2 Seconds2 Seconds1 Minute
7907907657406851090850790
Max ITT Condition Max Time
7907907657406851090850790
CAUTION
Engine torque and ITT limits are determined by ambient temperature. During operations requiring maximum engine performance, be aware of whether torque, or ITT limits govern. Remember, cold temperature or low altitude - torque limited, while hot temperature or high altitude is ITT limited.
N1 %
Note 1: Ground operations above 3500 foot pressure altitude (PA) may produce idle speeds as high as 83-percent N1 at low
idle.
Note 2: For every 10 deg C below -30 deg C ambient temperature, reduce maximum allowable N1 by 2.2%
Max AllowableMax ContinuousCruise ClimbCruiseAccelerationMax Reverse
5 MinutesContinuousContinuousContinuous2 Seconds1 Minute
101.5101.5101.5101.5102.686
N1 % Condition Max Time
Anybody from Wyoming???
Oil Pressure & Temperature
Max AllowableMax ContinuousCruise ClimbCruiseHi-IdleLo-IdleStartingAccelerationMax Reverse
5 MinutesContinuousContinuousContinuousContinuousContinuous ------2 Seconds1 Minute
85 - 10085 - 10085 - 10085 - 100 ------40 (min) ------ ------85-100
PSI Condition Max Time
10 - 9910 - 9910 - 9910 - 99-40 - 99-40 - 99-40 (min)10 - 9910 - 99
Deg C
Oil Pressure & Temperature Notes
-- Normal oil pressure is 85-100 PSIG at power settings above 72% N1.
-- Oil pressure below 85 PSIG is undesirable and may be used only for completion of a flight, and then at a reduced power setting. Low oil pressure should be corrected prior to next flight.
-- During ground operations, oil pressures below 40 PSIG require engine shutdown
-- During flight, oil pressure below 40 PSIG is unsafe and requires either engine shutdown or use of minimum power until a landing can be made.
25
Airspeed Limitations
Airspeed Limitations
Aircraft Speed SL to 15,500 FT 227 KIAS
Aircraft Speed 15,500 - 30,000 FT See Note
Smooth Air Gear & Flaps Down 140 KIAS
Turbulent Air Gear & Flaps Down 140 KIAS
Landing Gear Extension 155 KIAS
Landing Gear Retraction 145 KIAS
Flaps Extension 35% (App) 174 KIAS
Flaps Extended 100% (Full) 140 KIAS
Note: Decrease speed 4 KIAS for every 1000 ft above 15,500 ft
Miscellaneous Limitations
Fuel Management
** Do not takeoff if gauges are in the yellow arcs or < 265 lbs
** AVGAS is limited to 150 hours before overhaul
** Both boost pumps must be operable prior to takeoff
** Suction boost limited to 10 hrs between fuel pump overhaul
Weight Limitations
Max Ramp 9710 lbs
Max Takeoff 9650 lbs
Max Landing 9168 lbs
Caution
The following actions may result in aircraft damage and SHALL be avoided:
-- Landing on arresting gear cable
-- Nosewheel contact with cable risers above taxi speed
-- Braking during cable rollover
-- Operation above taxi speed over arresting gear rigged with boots (tire segments)
Questions ???