FP-2 T-44 Ops Limits Overview System Limitations Propeller Limitations Starting Limitations Engine Limitations Airspeed Limitations Miscellaneous Limitations.

Presentation on theme: "FP-2 T-44 Ops Limits Overview System Limitations Propeller Limitations Starting Limitations Engine Limitations Airspeed Limitations Miscellaneous Limitations."— Presentation transcript:

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2 FP-2 T-44 Ops Limits

3 Overview System Limitations Propeller Limitations Starting Limitations Engine Limitations Airspeed Limitations Miscellaneous Limitations

4 Instrument 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

5 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.

6 Propeller Limitations

7 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%)

8 Starter Limitations

9 Starting Limitations Min VDC for APU Charge Min VDC for APU Start Min VDC for Batt Start Starter Cycle: 40 sec on, 60 sec off 40 sec on, 30 min off 18 VDC 20 VDC 22 VDC

10 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

11 Engine Limitations

12 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 2 Seconds 1315 RPM 2200 RPM 1900 1520 ConditionMax Time 2100 1315 1315 1520 2100

13 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 Allowable Max Continuous Cruise Climb Cruise Lo-Idle Starting Acceleration Max Reverse 5 Minutes Continuous 2 Seconds 1 Minute 790 765 740 685 1090 850 790 Max ITT ConditionMax Time 790 765 740 685 1090 850 790

14 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.

15 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 Allowable Max Continuous Cruise Climb Cruise Acceleration Max Reverse 5 Minutes Continuous 2 Seconds 1 Minute 101.5 102.6 86 N1 % ConditionMax Time

16 Anybody from Wyoming???

17 Oil Pressure & Temperature Max Allowable Max Continuous Cruise Climb Cruise Hi-Idle Lo-Idle Starting Acceleration Max Reverse 5 Minutes Continuous ------ 2 Seconds 1 Minute 85 - 100 ------ 40 (min) ------ 85-100 PSI ConditionMax Time 10 - 99 -40 - 99 -40 (min) 10 - 99 Deg C

18 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.

19 25 Airspeed Limitations

20 Aircraft SpeedSL to 15,500 FT227 KIAS Aircraft Speed15,500 - 30,000 FTSee Note Smooth Air Gear & Flaps Down140 KIAS Turbulent AirGear & Flaps Down140 KIAS Landing GearExtension155 KIAS Landing GearRetraction145 KIAS FlapsExtension 35% (App)174 KIAS FlapsExtended 100% (Full)140 KIAS Note: Decrease speed 4 KIAS for every 1000 ft above 15,500 ft

21 Miscellaneous Limitations

22 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

23 Weight Limitations Max Ramp9710 lbs Max Takeoff9650 lbs Max Landing9168 lbs

24 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)

25 Questions ???