On the diagram the rotating blade pitch control is indicated by the letter 2436 ?
Path > visibility
What is a typical characteristic of a fully articulated rotor system ?
Which of the following statements with respect to the rotor brake is correct ?
A rotor fully articulated when The blades each have possibility to flap, drag feather separately, rotor head has hinges flapping as well as dragging, blades have been mounted flexibly with regard to flapping dragging, rotor has more than two blades that have separate flapping feathering hinges. 
The chord length of blades of a ducted tail rotor fenestron Smaller than that of a classic tail rotor, same as that of a classic tail rotor, greater than that of a classic tail rotor, depends on type of material used. 
An elastomeric bearing flapping hinge in rotor head Contributes to a reduced maintenance effort, allows larger blade flapping angles, allows larger forward speeds, utilised to absorb loads on rotor blades arising from vertical gusts. 
What are elastomeric bearing hinges in a rotor head Flexible sections accomplishing functions of flapping, dragging feathering hinges, self lubricating hinges, bending plastic parts, rubber flapping dragging hinges. Question Helicopter : Blades 38 Answer 8
Intermediate or angle gearboxes are used to Change direction sometimes speed of tail rotor drive, change direction of tail rotor drive only, change speed of tail rotor drive only, mount tail rotor. Question Helicopter : Blades 38 Answer 9
To engage main rotor drive prior to flight on a helicopter fitted with a centrifugal clutch pilot should Smoothly accelerate engine with rotor brake selected off, accelerate engine above rotor speed, decelerate engine, then accelerate again until engine rotor speeds are matched, de select free wheel engage drive, accelerate engine until engine rotor speed are equal then engage clutch using either a mechanical lever or an electrical switch. Question Helicopter : Blades 38 Answer 10
The tail rotor gearbox changes direction of drive Through 9 °, reduces rotational speed provides facilities tail rotor control, through minus 9 ° increases rotational speed, increases rotational speed, provides facilities tail rotor control maintaining a constant speed. the antitorque rotor (tail rotor) driven from transmission. the antitorque rotor produces thrust to oppose torque helps prevent helicopter from turning in opposite direction of main rotor. Question Helicopter : Blades 38 Answer 11
The purpose of a clutch in a helicopter transmission system to Permit engine to be started with a low inertial loading, permit rotor to rotate freely during autorotation, prevent rotor turning in wind when parked on ground, disengage tail rotor drive in event of a malfunction. Question Helicopter : Blades 38 Answer 12
Rotational drive from gearbox to rotorhead transmitted the Main drive shaft, scissors, swashplate assembly, pitch change arms. Question Helicopter : Blades 38 Answer 13
Intermediate or angle gearboxes are used to Change direction speed of tail rotor drive, change direction only of tail rotor drive, change speed only of tail rotor drive, allow incorporation of autopilot inputs into tail rotor. Question Helicopter : Blades 38 Answer 14
In a free turbine helicopter installation There no need a clutch between engine the transmission, a free wheel required between compressor the turbine, main rotor drive the compressor are on a common shaft, there must be a clutch between engine transmission. Question Helicopter : Blades 38 Answer 15
Helicopters which utilise a ''v' belt to transmit drive from engine to transmission also incorporate ''belt tightener' these belt tighteners serve as A manual clutch, an automatic system to ensure belt tension remains constant irrespective of temperature, a means which engineer can set belt tension, an automatic clutch. Question Helicopter : Blades 38 Answer 16
Freewheel units between engine and main rotor gearbox are in most cases lubricated from The main rotor gearbox lubrication system, the engine lubrication system, an independent lubrication system driven the main rotor gearbox, an independent system driven either engine or an electrically driven pump. Question Helicopter : Blades 38 Answer 17
For a free power turbine engine The turbine driving main rotor transmission mechanically independent from gas generator, compressor driving main transmission mechanically independent from power turbine, gas generator free to run at a constant speed while power turbine changes speed in response to changes in drag on main rotor blades, pilot control of engine limited to selection of off, ground idle flight, leaving engine to automatically respond to rotor demands. Question Helicopter : Blades 38 Answer 18
Clutches are located in drive between engine and main transmission on Helicopters with piston or direct drive gas turbine engines, all helicopters, helicopters fitted with piston engines only, helicopters with free power turbine engines only. Question Helicopter : Blades 38 Answer 19
A tail rotor drive shaft running between two engines should be Protected a firewall, mounted to allow expansion, mounted on its own bearing hangers, first being directly behind main rotor gearbox, protected the engine fire extinguishing system. Question Helicopter : Blades 38 Answer 20
What the purpose of freewheel unit in rotor drive system To disconnect failed engine from main tail rotor drive, to enable rotor to rotate freely autorotation, to be able to start engine(s) without starting to turn rotor, to be able to disconnect main rotor from drive system when engine fails. Question Helicopter : Blades 38 Answer 21
Does freewheel unit necessary helicopter with free turbine engine Yes, no, not with new generation engines, yes, but only multi engined helicopters, no. Question Helicopter : Blades 38 Answer 22
A snatch engagement of a freewheel unit May result in shearing of engine drive shaft, is normal engagement, is absorbed flexible couplings on engine drive shaft, will cause freewheel to ratchet until pilot recovers situation. Question Helicopter : Blades 38 Answer 23
A mercury clutch Utilises weight of mercury to provide centrifugal force to act on clutch shoes, not used in helicopters due to danger of mercury contamination of aluminium, uses liquid mercury as a hydraulic fluid, not used in helicopters due to high weight of mercury. Question Helicopter : Blades 38 Answer 24
The input and output speeds of an intermediate gearbox Differ to counter effects of vibration, differ to establish speed the tail rotor, are same, are variable to provide varying thrust from tail rotor to counteract torque loads from main rotor system. Question Helicopter : Blades 38 Answer 25
Tail rotors rotate At a greater speed than main rotor at a different speed than drive shaft intermediate gearbox, at same speed as shafts gear boxes, at a greater speed than main rotor the tail rotor drive shafts, at a lower speed than main rotor. Question Helicopter : Blades 38 Answer 26
Why are one or more flexible couplings usually incorporated in tail rotor drive shafts To absorb angular differences arising from bending of tail, to absorb quick power changes, to prevent vibrations, to prevent torsion of shafts. Question Helicopter : Blades 38 Answer 27
Metal tail rotor drive shafts are normally manufactured from Aluminium or steel tubing, aluminium tubing only, steel bar, titanium steel tubing. Question Helicopter : Blades 38 Answer 28
On diagram flapping hinge indicated number Question Helicopter : Blades 38 Answer 29
When using a strobe type tracking and balancing system on a fully articulated rotor head one blade not equidistant from other blades in lateral plane the cause of this defect that The blade damper on subject blade not functioning correctly, the blade rigging out of adjustment, the pitch change rod not correctly adjusted, the blade trim tabs are not correctly adjusted. Question Helicopter : Blades 38 Answer 30
What indication will be available to pilot of wear in either tail rotor gimbal or pitch change link bearings Vibration through tail rotor/yaw pedals, stiffness in tail rotor controls, instability in pitch control, loud noise from tail rotor. Question Helicopter : Blades 38 Answer 31
On diagram lead/lag hinge indicated number 2429 Question Helicopter : Blades 38 Answer 32
On diagram pitch hinge indicated number 2429 Question Helicopter : Blades 38 Answer 33
To ensure centre of pressure of a rotor blade acts through centre of gravity during manufacture A weight placed along length of blade, forward of main spar, the aerofoil designed to ensure centre of pressure in correct location, weights are located at tip of blade which are adjusted at manufacture to ensure centre of gravity in correct location, trim tabs are fitted to tailing edge of blade to adjust centre of pressure. Question Helicopter : Blades 38 Answer 34
The rotor blades that are most sensitive to humidity are those made of Wood, metal, composite materials, plastic. Question Helicopter : Blades 38 Answer 35
The purpose of blade tip cap 1 to reduce induced drag2 to increase lift in hover3 to increase max air speedthe combination containing all of correct statements , 2, 3,, 2, 2, 3,, 3. Question Helicopter : Blades 38 Answer 36
The purpose of aluminium mesh which manufactured within skin of some fibre glass covered rotor blades ' To provide protection against lightning strikes, to form shape of blade to allow lay up of fibre glass skin, to provide a superior bond between skin the foam core providing a strong rigid section, to transfer flight loads to skin. Question Helicopter : Blades 38 Answer 37
The purpose of a main rotor blade tracking check to ensure That all blades have same tip path plane, correct coning angle, that neutral control settings are correct, that pitch angle all blades absolutely equal. Question Helicopter : Blades 38 Answer 38
The most difficult material from which to manufacture a homogeneous series of blades Wood, metal, composite materials, plastic. Question Helicopter : Blades 38 Answer 39
The main spar of a main rotor blade at approximately 25% of chord, 35% of chord, 4 % of chord, 5 % of chord. Question Helicopter : Blades 38 Answer 40
Modern tail rotor blades are usually manufactured from Composite materials, metal, wood, carbon fibre.
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1479 Free Training Exam Other source study: Canada drone examen 38