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T.O. BMS1F-16CM-1
BMS 4.34 Change 2.00
BMS 4.34 Dash 1
© Red Dog 2012-2019
Page: 117
1.6 THE ENGINE
The BMS F-16 is powered by a single afterburning turbofan engine. The engine control system is
composed of two major components: the Fuel Control (see Fuel chapter), and the Digital Electronic
Engine Control (DEEC). The engine has two modes of operation: Primary (PRI) and Secondary (SEC).
1.6.1. Primary (PRI) and Secondary (SEC) engine control
PRI mode is the nominal mode of operation where the engine receives fuel as a function of throttle
inputs and the DEEC controls ignition, engine operation, AB operation and nozzle actuation.
SEC mode prevents AB operation and is used in the event of a DEEC failure or malfunction. SEC is
manually selected by the ENG CONT switch on the ENG & JET START panel or automatically by the
DEEC during SEC operation the SEC caution light illuminates and the nozzle remains closed.
1.6.2. Exhaust nozzle
The exhaust nozzle is variable and controlled by the DEEC as a function of throttle input.
In PRI with the LG handle down, the nozzle is greater than 80% open at IDLE. As the throttle is
advanced the nozzle closes. With the LG handle up the nozzle is near minimum except near MIL
power when the nozzle controls engine pressure according to fan speed.
When the throttle is advanced in the AB range the nozzle is opened to compensate for increasing AB
fuel flow.
In SEC the nozzle is closed to 0% and AB operation is inhibited.
1.6.3. Engine Oil system
Lubrication of the engine is done with a self-contained oil system. In BMS 4.34 oil issues may arise as
during ramp start, or as a result of battle damage. Pilots should ensure that oil pressure is always
within operating limits. A loss of oil pressure will lead to engine seizure. See SECTION III
ABNORMAL & EMERGENCY PROCEDURES for further information.
1.6.4. Engine Anti-Ice system
No component of this system is currently implemented in BMS 4.34.
The Anti ice switch and the INLET ICING caution light are eye candy.
1.6.5. Jet Fuel Starter (JFS)
The JFS is a gas turbine which uses aircraft fuel. The JFS receives fuel at all times regardless of the
FUEL MASTER Switch position. The JFS is started from two accumulators, used either singly
(START 1) or together (START 2). In BMS we only have the START 2 option.
If you do not succeed in starting the engine after JFS discharge you now have the option to ask your
crew chief to manually recharge the accumulator with a hand pump. This option is available through
the ground page of the ATC menu (you must be on the ground frequency) and will make you very
unpopular with your crew chief. Recharging the JFS will take about 3 minutes, during which a status
message is displayed in the top right corner of the screen. Once the message disappears you can give
START 2 another try. Remember to buy your crew chief a case of beer.
As well as starting the engine on the ground without any external aid the JFS can be used to assist in
engine air-start. This is explained in the ABNORMAL & EMERGENCY PROCEDURES section later.
In flight the accumulators are charged automatically by hydraulic system B in about 60 seconds.
Summary of Contents for F-16C/D 4.34
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