Type Exam #2 Flashcards
Bell 206 B has either Rolls Royce model _________ or __________ producing _________ and __________ shaft horse power respectfully.
Debated to __________ because _________
250-C20 250-C20B 400 HP 420 HP 370 HP To maintain sea level performance at altitude
Fuselage consists of________
3 main sections
Main rotor diameter ________
Tail rotor diameter BII _________
Tail rotor diameter BIII _________
33’4”
62”
65”
4 Modular sections of engine
Compressor
Accessory gearbox
Turbine
Combustion
Free turbine engine means?
Gas producer and power turbine are not mechanically connected
Compressor compresses air through _______ axial and ________ centrifugal states of compression
6
1
A ________ and _________ are mounted in rear ending of combustion case
Spark ignitor
Fuel nozzle
Approximately ________ of compressed is used for combustion, the rest is used for __________ and ________
25%
Cooling
Accessories
The gas producer turbine (N1) drives the \_\_\_\_\_\_\_\_\_\_\_ and through accessory gear train: 1 2 3 4 5
Compressor Fuel pump Oil pump N1 Tach Gen FCU Starter Generator
Power turbine (N2) gear train drives the: 1 2 3 4
N2 Tach/Gen
Power Turbine Governor
Torque meter
Power output shaft
The particle separator ejects contaminants overboard by means of ___________ that creates a Venturi effect
Bleed Air
The bleed air valve is mounted on _________ stage of the compressor and is designed to prevent compressor __________ and ___________
5th
Surge
Stall
The TOT is measured using _________ chromel alumel thermocouples
4
The engine out warning system will activate whenever the N1 is less than _________
55% +- 3%
Ignition system consists of
1
2
3
Exciter
Ignitor lead
Spark ignitor
Standard fuel cell holds _________
76 US Gallons
Fuel cell with range extender holds ______
96.7 US Gallons
Unusable fuel is approximately
1 US Gallon
Fuel is supplied by ________ identical electrical pumps
2
Engine driven fuel pump operates at approximately _______ PSI
600 PSI
If the engine driven fuel pump quits will engine quit?
Yes
The N2 “beep range” adjusted by linear-actuator should be _________ on a BII and ________ on a BIII
95-100% +-1%
97-100% +-1%
The oil cooler blower also provides cooling for the _________ and __________ systems
Transmission
Hydraulic
If the scavenge oil filter button is popped out?
An impeding bypass
Engine torque is a measurement of?
Oil pressure
The engine oil system is protected by _______ chip detectors?
2
The transmission and free wheeling unit oil system is protected by ________ chip detectors
3
The tail rotor gearbox is protected by ______ chip detectors
1
The hydraulic system operates at?
600 PSI
There are _______ hydraulic servo actuators?
3
The collective servo is mounted in the _________ and the cyclic servos are mounted __________
Middle
On each side
If the hydraulics filter button is popped out it means?
Impeding filter blockage
The hydraulic system is considered fail safe?
It will operate normally during complete electrical failure
The transmission receives the engine output shaft at ________ RPM and reduces it to ________ rotor RPM
6016
394
An accessory drive pad on the transmission drives the
1
2
3
Transmission oil pump
Hydraulic pump
N2 Tach Gen
Purpose of free wheeling unit?
To allow power train to disengage from the engine should the engine fail
The tail rotor is supported by ______ self aligning bearing assemblies
8
The tail rotor gearbox reduces main rotor shaft from ________ RPM to ________ tail rotor RPM
6016
2553
The main rotor is a __________ system and the tail rotor is a __________ design
Under slung semi rigid
Semi rigid delta hing
What is the purpose of the horizontal stabilizer?
To provide a downward force on the tail boom resulting in the near level attitude in forward flight
Why is the vertical stabilizer off-set?
To help reduce to load on the tail rotor in fwd flight
The electrical system is a direct-current ___________ volt system with a __________ volt battery
28
24
A good start is considered to be less than __________ from the introduction of fuel to reaching ground idle
25 seconds
Consistent long cool stars longer than __________ or more can be detrimental to the life of the gas producer turbine?
35 seconds
___________ , ___________ starts increase cooling and help to insulate the turbine
Quick , warm
