FG-02 Power Plant and Fuel Systems

Power plant takeoff power

Normal Take-off Power 1800 hp (2000 hp emergency up-trim)

Propeller description

Hamilton Standard 14-SF four-blade, feathering, reversible constant speed unit.

Power plant operation

managed by Power Levers and Condition Levers in the Flight Compartment

Power Plant Diagram

Power Levers

Controls engine speed & propeller pitch in ground operation & during Approach and Landing (Beta mode)

Condition Levers

Set propeller RPM during flight (constant speed mode) (min 900 max 1200 RPM)

Auto Feather System

- Provides automatic prop feathering following an engine failure during take off and engine up-trim for the unaffected engine.

- Feathered to reduce drag, and control the rotation of the free spinning prop

Power up-trim mode

Automatically boosts power output of one engine (2000 hp) in response to auto feathering of the opposite engine during take-off

Propeller syncrophase system

Synchronizes both propeller speed and blade position of the two propellers in cruise flight.

Significant noise and vibration reduction to increase crew comfort.

Matches the speed and phase of the No.2 propeller (slave) to that of the No. 1 Prop (master).

Engine oil system

- Provides lubrication of engine bearings and gear boxes

- Provides oil pressure for propeller actuation.

- Pressurized by pressure pump driven by accessory gearbox. (60 psi)

- Cooled by oil cooler (75-85 C)

Power plant monitoring

1. Engine torque

2. Propeller RPM

3. Inter-Turbine Temperature (ITT)

4. Fuel flow

5. Fuel temperature

6. Oil temp and pressure

7. NH (High pressure compressor speed)

8. NL (Low pressure compressor speed)

9. Fuel tank temperature

Main fuel tanks

Located on the outboard side of the nacelle. Each also contain a Collector and Surge bay.

There are 3 pumps per main tank. One to pump fuel out of the collector bay into the engines and two to pump fuel into the collector bays.

Collector bays

Gravity fed from the Main tank through one-way check valves, topped up by a high-volume pumping system. This ensures the collector bay is full at all times in order to supply the engines. Excess fuel spills over the top of a divider back into the Main Tanks.

Surge bays

Facilitate Main and Aux tank venting during fueling and fuel transfers. Does not normally contain any fuel. Any fuel that does make it to the surge bay is returned to the main tanks via ram air pressure provided by vents in the wings.

Aux tanks

A single scavenge pump transfers fuel into the associated main tank. Are NOT capable of feeding directly into the collector bay or across into the opposite wings tanks.

Usable main tanks fuel

5678 lbs

Usable aux tanks fuel

4566 lbs

Total usable fuel

10244 lbs

Max fuel with 8 crew

6780 lbs

Fuel transfer system

Aux tanks to associated main tanks, between main tanks

To correct any fuel imbalances, fuel is pumped from one main tank to the other.

Max fuel imbalance allowed

Main tanks: up to 600 lbs

Aux tanks: up to 1500 lbs

If the aux tanks are max imbalanced, the main tanks are allowed no imbalance, and vice-versa

Standard fuel

JP8+100

F37

Acceptable fuels

Jet A

Jet B'

Jet A1

JP4

JP5

JP8

Emergency fuels

AVGAS

F22