T-38 DASH-1 SECTION I (OVERVIEW/ENGINES) Flashcards
The T-38C aircraft, originally produced by _____, and upgraded by _____, is a ___-place, twin-_____ _____ trainer.
originally produced Northrop Corp, upgraded by The Boeing Co., two-place twin-turbojet supersonic trainer
Each cockpit contains an individual _____ canopy and _____.
jettisonable canopy and ejection seat
What conditions and pressurizes the air in both cockpits?
A cabin air conditioning and pressurization system
The fuselage is an ____ shape, with moderately ____ wings and empennage.
area-rule (coke bottle), moderately swept-back
The aircraft is equipped with an all-moveable?
horizontal tail
A speed brake is located?
on the lower surface of the fuselage center section
The tricycle landing gear has a _____ nosewheel
steerable
All flight control surfaces are fully powered by ______?
two independent hydraulic systems
The aircraft has a ___º total field-of-view Heads Up Display
24º
What is the length of the T-38?
46 feet 4 inches
What is the wingspan of the T-38?
25 feet 3 inches
What is the height of the T-38?
12 feet 11 inches
What is the tread of the T-38?
10 feet 9 inches
What is the wheelbase of the T-38?
19 feet 5 inches
The gross weight of the aircraft fully serviced with two aircrew is approximately?
12,800 pounds
As part of the Propulsion Modernization Program (PMP), the aircraft is powered by two _____ engines.
General Electric J85-GE-5R/S engines
The General Electric J85-GE-5R/S are ___-stage, ____-flow, ____ engines.
eight-stage
axial-flow
turbojet engines
Sea level, standard day, static thrust for an installed engine is approximately _____ pounds at MIL power and approximately _____ pounds at full MAX power.
2200 pounds MIL
3300 pounds MAX
Where does air enter the engine and and where does it to?
Air enters through the variable inlet guide vanes, which direct the flow of air into the compressor
What assists in regulating compressor airflow to maintain stall-free compressor operation?
The automatic positioning of the inlet guide vanes and air bleed valves
What are mounted on the same shaft?
Two turbine wheels and the compressor rotor stages
The exhaust gases are discharged through?
a variable area exhaust nozzle
What system varies the nozzle area to maintain EGT (Exhaust Gas Temperature) within limits at both MIL and MAX throttle positions?
An exhaust gas temperature (T5) sensing system
Engine starts require _____, _____ power to energize the ignition holding relay, and ____ power for ignitor firing.
compressor motoring (low-pressure air supply), Direct Current (DC) power for the ignition holding relay, and Alternating Current (AC) for ignitor firing
For ground starts, a manually operated diverter valve, mounted _____, is positioned by the ground crew to direct the flow of air to the selected engine during the start cycle.
mounted on the left engine
How many engine start buttons are there and where are they located?
Two ENGINE START buttons are located in the left subpanel of each cockpit
Momentarily pushing the ENGINE START button for the selected engine arms the ignition circuit (ignition timer and holding relay) for approximately ____ seconds
30 seconds
What 2 things does moving the throttle to IDLE do during engine start?
-energizes the ignition exciter (firing main and afterburner igniters)
-allows starting fuel flow to the engine
What does any delay in moving the throttle to IDLE after pushing the ENGINE START button do?
Decreases the available ignition time from the 30-second cycle by an equal amount
If you were to press the ENGINE START button again during a 30-second cycle, what would it do?
Momentarily pressing the ENGINE START button again during a 30-second cycle does NOT reset the ignition timer and start another cycle since the first actuation locks in the cycle (holding relay energized) until the timer expires
Without pressing the ENGINE START button, how could you energize the main and afterburner igniters for a 30-second cycle?
By moving the throttle to the MAX range.
However, retarding the throttle out of the MAX range at any time during the 30-second cycle stops the igniters from firing and resets the time (the throttle must be retarted from MAX to below MIL)
…more on this in the -1
With the throttle at IDLE or above, the igniters can be energized at any time for longer than 30 seconds by?
selecting and holding the appropriate ENGINE START button
AC power from a ______ can be used for engine starts. For battery starts, the _____ supplies AC power to circuits that provide the right ____ and ____ indications during start cycle
battery-operated static inverter; static inverter; fuel flow and oil pressure
