- 4 quarts (expansion space of 1 qt) - 1 pint per hour max oil consumption - House T5 Alt and Tach generator

- Throttles Max - Fuel thru Pilot spraybars - T5 sences increase in temp and takes over and over 97% - Main spraybars activate - AB TIME

- Discharge Pressure - Throttle Position (over 97%) - Nozzle Actuator (overrides) - Temperature

SY1113-4 Engine System Flashcards by Casey Walters

Engine Type

J85-GE- 5 Turbojet

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How many stages and what type of flow is the engine

Eight Stage, Axial Flow

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Thrust produced in MIL and MAX

2200 lbs

- 3300 ilbs

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avoid throttle movement from idle to max less than ___ secs

1 sec

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Front Frame does

Directs Flow of Air at Optimum Angle Using the Inlet Guide Vanes

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Compressor does

Supplies Large Masses of Compressed Air to the Combustion Section

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8 th Stage Compressor Air Operates the Following Engine and Aircraft Pneumatic Systems

-Inlet guide vanes
-Bleed Air valves
-Defog
-Canopy seal
-A/C
-Pressurization
Hydraulic reservoir px
-engine anti-ice

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Combustion Section use how much of the air for combustion

25%

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Afterburner accelerates exhaust by how mcuh

5-40%

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What is mounted to engine gearbox (TOMAN)

T5 alternator
Oil Pump
Main Fuel Control (MCF)
Afterburner Fuel control
Nozzle Actuator

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Oil Pump

4 quarts (expansion space of 1 qt)
1 pint per hour max oil consumption
House T5 Alt and Tach generator

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Main Fuel Control (MFC)

Hydro mechanical
Prevent Flameouts/ Compressor stall/ overtemp by controlling fuel
Variable geometry system ( Inlet guide vanes, Air bleed valves
Reduce fuel at low power settings

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MFC controls fuel given by

discharge px
inlet temp
RPM
Throttle Position

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Afterburner sequence

Throttles Max
Fuel thru Pilot spraybars
T5 sences increase in temp and takes over and over 97%
Main spraybars activate
AB TIME

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T5 controls AB by

Discharge Pressure
Throttle Position (over 97%)
Nozzle Actuator (overrides)
Temperature

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Overspeed Governor after MFC

Monitors the Maximum Speed of the Engine and Reduces Fuel Flow as Needed

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T2 Sensor

Limits Fuel Flow as a Function of Inlet Temperature

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Variable Area Exhaust Nozzle controls EGT via

Hydromechanical System and the T5 System
IDLE to 97% Controls the Nozzles to Maintain EGT, Maxing to Full Closed at 97%
When Retarded From MAX Through 97%, Closes Nozzles

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T5 system controls when

-Beyond 97% RPM Opens the Nozzles to Ensure EGT Limitations

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Anti-Ice is located where

Bullet Nose and Inlet guide vanes

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Anti-Ice comes from where and EGT raise/ power change

Study These Flashcards

from 8th stage compressor
Between 94% - 98% RPM, Increase in EGT of 15C Can be Expected
Requires 80% RPM (Automatically Turns on at 65%)
9% Loss of Thrust at MIL and a 6.5% Loss of Thrust in MAX

When to use Anit-Ice

Study These Flashcards

Should be Used Below 32F and in Visible Moisture or High Humidity

What are the 7 parts of the engine, in order (FCMCTEAN)

Study These Flashcards

Front frame, compressor, main frame, combustor, turbine, exhaust, afterburner, nozles

What is the function of the front frame section?

Study These Flashcards

Admit air into compressor section and direct airflow into the first stage compressor at proper angle

What is the function of the compressor section?

Supply large masses of compressed air into the combustion section.

What is the function of the main frame section?

Primary structural component and divergent diffuser passage for compressed air entering combustion section

What is the function of the combustion section?

To add fuel to the compressed air and ignite it

What is the function of the turbine section?

Extract energy from the high-velocity airstream to drive compressor and engine accessories

What is the function of the exhaust section?

Smooths out airflow leaving turbine and entering tailpipe, contains AB fuel and lighting components and T5 sensor

What is the function of the afterburner section?

augment thrust of main engine 5-40% at a cost of of twice the fuel consumption per pound of thrust

What is the function of the variable area exhaust nozzle?

Provides an efficient exit passage that opens and closes to optimize engine efficiency and control EGT

What is the purpose of the variable geometry system?

Inlet guide vanes direct incoming air to the optimum AOA

What are the operating characteristics of the variable geometry system?

At low RPM, bleed valve opens to allow compressed air escape the 3rd-5th stages of the compressor

What is the purpose of the engine anti-ice system?

To prevent ice build-up on the inlet vanes and bullet nose of the engine

What are the operating characteristics of the engine anti-ice system?

Directs 8th stage compressor air; automatically comes on with right AC failure

What is the purpose of the engine accessories?

Converts engine power into usable power for aircraft systems

What are the operating characteristics of the engine accessories?

Divided into 2 sections - airframe accessories and airframe mounted gearbox. Driven by a power takeoff (PTO) from engine compressor drive shaft

What is the purpose of the fire detection system?

Warn the pilot of a high-temperature condition in the engine bay

What are the operating characteristics of the fire detection system?

Cannot be dimmed, independent for L and R, operates on DC power, sensors are pneumatically operated through inert gas, can respond to average or highly localized temps

What is unique about the tachometer?

Only independently operated indicator in the whole jet

What are the three failure modes of the tachometer?

broken wire (0%), sheared oil pump shaft, EED failure (FAIL)

What are the AC-powered instruments?

hydraulic pressure, engine tachometer, fuel flow, fuel quantity, oxygen quantity, oil px

What are the engine-oil restrictions for zero-g and neg-g flight?

10 seconds and 30 seconds

What are the DC-powered instruments (NEEF)?

nozzle, EED, EGT, flaps

What purpose fo the inlet fuide vanes serve?

Reduce possibility of compressor stalls

How will anti-ice be affected with an AC power failure?

fully effective (automatic) above 80% RPM

What atmospheric conditions should you use anti-ice?

Temp near or below 32*, visible moisture or high humidity

What is the primary advantage of afterburners in engine design?

High thrust for low weight

Name 3 properties of the T5 system and nozzles

Nozzles close until 97%, T5 operates nozzles to maintain 630-650 EGT in MAX, and T5 system's purpose maintain EGT within limits

What are two ways you can observe the T5 system working?

Observe EGT between 630 and 650 and check nozzles open while advancing throttle from 97% to MIL

What is the T5 electrical source?

Independent AC alternator

SY1113-4 Engine System Flashcards

(51 cards)