Multiengine Systems Flashcards
C.F.R.P.
Carbon Fiber Reinforced Plastic
material that makes up the structure of the aircraft
G.F.R.P.
Glass Fiber Reinforced Plastic
material that makes up the outer shell of the aircraft
ECU
Engine Control Unit
2 per engine - A & B
FADEC
Full Authority Digital Engine Control
Landing Gear
fully retractible tricycle configuration with nose wheel steering
- Electrically powered hydraulics
- pressured when retracted; fails out
Squat Switches
LH - on ground ldg gear protection
RH - Stall warning heat, engine pre-glow, ECU test, TAS voice warning
Variable Elevator Backstop
limits elevator defelction from 15° to 13° during go around procedures
when both power levers are above 20%
Powerplant
2 Austro E4-B AE 300 Engines
- turbo charged w/ intercooler (10,000’)
- 121.5” cu. displacement
Engine Configuration
In-line 4-cylinder w/ common rail fuel injector
Engine Cooling
Liquid Cooled
Engine max power
100% (2300 RPM) for 5 minutes
Max continuous power
92% (2100 RPM)
Engine Reduction Gear Ratio
1:1.69
Propeller
- MTV-6-R-C-F/CF 187-129
- 6 = 6 blades
- R = 1/2” flange
- C = counter weights
- F = full feathering
- CF = centrifigul force locking pins
- 187 = 187 cm - 3-blade wooden (stainless steel edge)
- constant speed, feathering
- governor operated by gearbox oil (high pressure, high RPM)
Feathering System
- controlled by “Engine Master off”
- unfeathering accumulator lower prop pitch when engine master on
Fuel Pumps
- 1 high pressure fuel pump that feeds common rail
- low pressure fuel pumps move fuel fkrom tank to system
Oil System
- Wet sump
- 5-7 liters
- max oil consumption = 0.1 l/hr
- normal operating range = 50°C - 135°C
Gear box temperature range
Normal = 35°C - 115°C
-30° - 120°
Coolant Temperature Range
60°- 95°
-30° - 105°
Fuel Temperature
-20°C - 55°C
-30° - 60°
Fuel Pressure
4 - 7 bar
Thermostatic Valve
redirects coolant into heat exchanger when temperature exceeds 88°C
Fuel Capacity
25 useable/engine
26 total
Extended Fuel Tanks
13.2 useable
- 13.7 total - fuel capacity to 76.4 useable; 79.4 total
Max fuel unbalance
5 gal
Types of Flaps
Inboard - Split
Outboard - Plain
Electrical System
28v DC powered by 2 belt-driven alternators
Alternators
- 1 per engine
- 28v and 70A
How many batteries are in the electrical system?
6 total:
- main battery - 24v, 13.6 Ahr lead-acid
- 4x ECU backup batteries - 2x 12v (in series - 24v total); 30 min ECU power
- Emergency backup battery - 10x 3v, 1300Ahr (in series - 30V total); 90 min stby att ind & flood lights
External Power
28v socket
