A free Premium account on the FCL.055 website! Read here
Sign up to unlock all our services and 15164 corrected and explained questions.


Question 283-1 : The rotor solidity is ? [ Attainment AIM ]

The ratio of the total blade area to the disc area.

.rotor solidity has been defined as the ratio of total blade area to the disk area. values for contemporary helicopters vary from about 0.06 to 0.12..smaller helicopters generally tend to have lower solidity rotors..selecting the rotor solidity during the design process requires a careful consideration of blade stall limits, that is the mean lift coefficient where the rotor performance will be stall limited. exemple 383 The ratio of the total blade area to the disc area.

Question 283-2 : If the static lateral stability of an aeroplane is increased, whilst its static directional stability remains constant ?

Its sensitivity to dutch roll increases.

exemple 387 Its sensitivity to dutch roll increases.

Question 283-3 : An aeroplane is sensitive to dutch roll when ?

Static lateral stability is much more pronounced than static directional stability.

exemple 391 Static lateral stability is much more pronounced than static directional stability.

Question 283-4 : In what axis acts a 'phugoid' ?

Lateral axis.

. 2422 exemple 395 Lateral axis.

Question 283-5 : Which rotor have a quicker pitch response, fully articulated rotor or teetering rotor ?

Fully articulated rotor.

exemple 399 Fully articulated rotor.

Question 283-6 : For a helicopter in steady forward flight, what is the speed of the blade in front of the pilot ?

The rotational speed of the blade.

exemple 403 The rotational speed of the blade.

Question 283-7 : What happens to the lift and drag of a blade when the angle of attack is increased beyond the stalling angle ?

Lift starts decreasing and drag remains increasing.

Ecqb01 february 2014 exemple 407 Lift starts decreasing and drag remains increasing.

Question 283-8 : Changes in the center of pressure of a rotor blade affects ?

Aerodynamic balance and controllability.

Ecqb01 february 2014 exemple 411 Aerodynamic balance and controllability.

Question 283-9 : With increasing helicopter airspeed the induced drag of the rotor blade ?

Reduces.

exemple 415 Reduces.

Question 283-10 : With increasing helicopter airspeed the profile drag ?

Increases slightly.

Ecqb01 february 2014 exemple 419 Increases slightly.

Question 283-11 : How will lift coefficient behave when a pilot gradually increases the collective pitch ?

It increases and reaches maximum value at the critical angle of attack.

Ecqb01 february 2014 exemple 423 It increases and reaches maximum value at the critical angle of attack.

Question 283-12 : When we move the cyclic stick in such manner that the blade azimuth of 90° has the.most increase of pitch, the rotor disc will tilt ?

Backward.

Ecqb01 february 2014 exemple 427 Backward.

Question 283-13 : When we move the cyclic stick in such manner that the blade azimuth of 180° has the most increase of pitch, the rotor disc will tilt ?

Right.

.when we talk about azimuth , you have to start counting the degrees from the rear of the main rotor, in the rotation of the disc. 2774 exemple 431 Right.

Question 283-14 : When we move the cyclic stick in such manner that the blade azimuth of 270° has the.most increase of pitch, the rotor disc will tilt ?

Forward.

Ecqb01 february 2014 exemple 435 Forward.

Question 283-15 : When we move the cyclic stick in such manner that the blade azimuth of 000° has the.most increase of pitch, the rotor disc will tilt ?

Left.

Ecqb01 february 2014 exemple 439 Left.

Question 283-16 : Blade flapping is a consequence of ?

Asymmetric relative airflow distribution on the rotor disc.

Ecqb01 february 2014 exemple 443 Asymmetric relative airflow distribution on the rotor disc.

Question 283-17 : A helicopter in level flight and constant airspeed is turned into 30° bank so the lifting force has to ?

Increase, specific disc loading increases.

Ecqb01 february 2014 exemple 447 Increase, specific disc loading increases.

Question 283-18 : Which helicopter design parameter fits the definition ratio between helicopter gross mass and rotor disc area ?

Disc loading.

Ecqb01 february 2014 exemple 451 Disc loading.

Question 283-19 : Longitudinal stability of helicopter in flight is achieved through ?

Horizontal surfaces on the tail of the helicopter.

Ecqb01 february 2014 exemple 455 Horizontal surfaces on the tail of the helicopter.

Question 283-20 : We control the helicopter around the lateral axis with a ?

Cyclic stick.

Ecqb01 february 2014 exemple 459 Cyclic stick.

Question 283-21 : We control the helicopter around the longitudinal axis with a ?

Cyclic stick.

Ecqb01 february 2014 exemple 463 Cyclic stick.

Question 283-22 : The mach number is the ratio between the ?

Tas and the local speed of sound.

.mach number formula is.mach number = tas / lss..tas is true airspeed expressed in knots..lss is local speed of sound expressed in knots. exemple 467 Tas and the local speed of sound.

Question 283-23 : Rolling is ?

The rotation of the helicopter about the longitudinal axis.

. 2422 exemple 471 The rotation of the helicopter about the longitudinal axis.

Question 283-24 : When hovering over long grass the power required to hover will be greater than that required over a smooth surface. why is this ?

Greater recirculation of air through the rotor disc.

.ground effect is the increased efficiency of the rotor system caused by interference of the airflow when near the ground. the air pressure or density is increased, which acts to decrease the downward velocity of air. ground effect permits relative wind to be more horizontal, lift vector to be more vertical, and induced drag to be reduced. these conditions allow the rotor system to be more efficient. maximum ground effect is achieved when hovering over smooth hard surfaces..when hovering over surfaces as tall grass, trees, bushes, rough terrain, and water, maximum ground effect is reduced..rotor efficiency is increased by ground effect to a height of about one rotor diameter measured from the ground to the rotor disk for most helicopters. since the induced flow velocities are decreased, the aoa is increased, which requires a reduced blade pitch angle and a reduction in induced drag. this reduces the power required to hover in ground effect.. 1348.when hovering over long grass the power required to hover will be greater than that required over a smooth surface. it is similar to hovering outside ground effect since there is a greater recirculation of air through the rotor disc.

Question 283-25 : For a clockwise turning rotor, drag divergence mach will appear on the blade azimuth ?

90°.

.when we talk about azimuth , you have to start counting the degrees from the rear of the main rotor, in the rotation path of the disc. 2774.at 90° we are in the advancing side. exemple 479 90°.

Question 283-26 : If the continuity equation is applicable, what will happen to the air density rho if the cross sectional area of a tube changes low speed, subsonic and incompressible flow ?

Rho1 = rho2.

exemple 483 Rho1 = rho2.

Question 283-27 : A message concerning aircraft parts and material urgently required is ?

A flight regularity message.

Icao annex 10. 107..5.1.8.6 flight regularity messages shall comprise the following..1 messages regarding the operation or maintenance of facilities essential for the safety or regularity of aircraft operation,..2 messages concerning the servicing of aircraft,..3 instructions to aircraft operating agency representatives concerning changes in requirements for passengers and crew caused by unavoidable deviations from normal operating schedules. individual requirements of passengers or crew shall not be admissible in this type of message,..4 messages concerning non routine landings to be made by the aircraft,..5 messages concerning aircraft parts and materials urgently required,..6 messages concerning changes in aircraft operating schedules. exemple 487 A flight regularity message.

Question 283-28 : A message concerning an aircraft being threatened by grave and imminent danger, requiring immediate assistance is called ?

Distress message.

Img651 exemple 491 Distress message.

Question 283-29 : Air traffic control messages clearances, instructions, etc. belong to the category of ?

Flight safety messages.

Icao annex 10. 107..5.1.8.4 flight safety messages shall comprise the following..1 movement and control messages,..2 messages originated by an aircraft operating agency or by an aircraft, of immediate concern to an aircraft inflight,..3 meteorological advice of immediate concern to an aircraft in flight or about to depart individually communicated or for broadcast ,..4 other messages concerning aircraft in flight or about to depart. exemple 495 Flight safety messages.

Question 283-30 : Flight safety messages are ?

Air traffic control messages.

Icao annex 10. 107..5.1.8.4 flight safety messages shall comprise the following..1 movement and control messages ,..2 messages originated by an aircraft operating agency or by an aircraft, of immediate concern to an aircraft inflight,..3 meteorological advice of immediate concern to an aircraft in flight or about to depart individually communicated or for broadcast ,..4 other messages concerning aircraft in flight or about to depart. exemple 499 Air traffic control messages.

Question 283-31 : Regardless of your position, time figures are transmitted with reference to ?

Utc

exemple 503 Utc

Question 283-32 : The clearance 'cleared for immediate take off runway 03' is ?

A flight safety message.

exemple 507 A flight safety message.

Question 283-33 : The message addressed to an area control center request radar vectors to circumnavigate adverse weather is ?

A flight safety message.

Icao annex 10. 107..5.1.8.4 flight safety messages shall comprise the following..1 movement and control messages ,..2 messages originated by an aircraft operating agency or by an aircraft, of immediate concern to an aircraft inflight,..3 meteorological advice of immediate concern to an aircraft in flight or about to depart individually communicated or for broadcast ,..4 other messages concerning aircraft in flight or about to depart.

Question 283-34 : The message to an aeronautical ground station 'please call a taxi cab for us. we will arrive at 1045' is ?

An unauthorized message.

Icao annex 10. 107..5.1.8.6 flight regularity messages shall comprise thefollowing..1 messages regarding the operation or maintenance of facilities essential for the safety or regularity of aircraft operation,..2 messages concerning the servicing of aircraft,..3 instructions to aircraft operating agency representatives concerning changes in requirements for passengers and crew caused by unavoidable deviations from normal operating schedules. individual requirements of passengers or crew shall not be admissible in this type of message,..4 messages concerning non routine landings to be made by the aircraft,..5 messages concerning aircraft parts and materials urgently required,..6 messages concerning changes in aircraft operating schedules...the message ' please call a taxi cab for us. we will arrive at 1045 ' is an unauthorized message. exemple 515 An unauthorized message.

Question 283-35 : The order of priority of the following messages in the aeronautical mobile service is ?

Flight safety message, meteorological message, flight regularity message.

Img115..flight safety messages shall comprise the following.1 movement and control messages,.2 messages originated by an aircraft operating agency or by an aircraft, of immediate concern to an aircraft inflight,.3 meteorological advice of immediate concern to an aircraft in flight or about to depart,.4 other messages concerning aircraft in flight or about to depart...meteorological messages shall comprise meteorological information to or from aircraft...flight regularity messages shall comprise the following.1 messages regarding the operation or maintenance of facilities essential for the safety or regularity of aircraft operation,.2 messages concerning the servicing of aircraft,.3 instructions to aircraft operating agency representatives concerning changes in requirements for passengers and crew caused by unavoidable deviations from normal operating schedules. individual requirements of passengers or crew shall not be admissible in this type of message,.4 messages concerning non routine landings to be made by the aircraft,.5 messages concerning aircraft parts and materials urgently required,.6 messages concerning changes in aircraft operating schedules. exemple 519 Flight safety message, meteorological message, flight regularity message.

Question 283-36 : The order of priority of the following messages in the aeronautical mobile service is ?

Distress message, urgency message, direction finding message.

Img115..flight safety messages shall comprise the following.1 movement and control messages,.2 messages originated by an aircraft operating agency or by an aircraft, of immediate concern to an aircraft inflight,.3 meteorological advice of immediate concern to an aircraft in flight or about to depart,.4 other messages concerning aircraft in flight or about to depart...meteorological messages shall comprise meteorological information to or from aircraft...flight regularity messages shall comprise the following.1 messages regarding the operation or maintenance of facilities essential for the safety or regularity of aircraft operation,.2 messages concerning the servicing of aircraft,.3 instructions to aircraft operating agency representatives concerning changes in requirements for passengers and crew caused by unavoidable deviations from normal operating schedules. individual requirements of passengers or crew shall not be admissible in this type of message,.4 messages concerning non routine landings to be made by the aircraft,.5 messages concerning aircraft parts and materials urgently required,.6 messages concerning changes in aircraft operating schedules. exemple 523 Distress message, urgency message, direction finding message.

Question 283-37 : The priority of the instruction taxi to runway 05 is ?

Same as line up runway 07 and wait.

Img115..flight safety messages shall comprise the following.1 movement and control messages,.2 messages originated by an aircraft operating agency or by an aircraft, of immediate concern to an aircraft inflight,.3 meteorological advice of immediate concern to an aircraft in flight or about to depart,.4 other messages concerning aircraft in flight or about to depart...meteorological messages shall comprise meteorological information to or from aircraft...flight regularity messages shall comprise the following.1 messages regarding the operation or maintenance of facilities essential for the safety or regularity of aircraft operation,.2 messages concerning the servicing of aircraft,.3 instructions to aircraft operating agency representatives concerning changes in requirements for passengers and crew caused by unavoidable deviations from normal operating schedules. individual requirements of passengers or crew shall not be admissible in this type of message,.4 messages concerning non routine landings to be made by the aircraft,.5 messages concerning aircraft parts and materials urgently required,.6 messages concerning changes in aircraft operating schedules.... taxi to runway 05 and line up runway 07 and wait are both flight safety messages. exemple 527 Same as “line-up runway 07 and wait”.

Question 283-38 : The priority of the pilot's message 'request qdm' is ?

Greater than 'turn left heading...'

Img115..flight safety messages shall comprise the following.1 movement and control messages,.2 messages originated by an aircraft operating agency or by an aircraft, of immediate concern to an aircraft inflight,.3 meteorological advice of immediate concern to an aircraft in flight or about to depart,.4 other messages concerning aircraft in flight or about to depart...meteorological messages shall comprise meteorological information to or from aircraft...flight regularity messages shall comprise the following.1 messages regarding the operation or maintenance of facilities essential for the safety or regularity of aircraft operation,.2 messages concerning the servicing of aircraft,.3 instructions to aircraft operating agency representatives concerning changes in requirements for passengers and crew caused by unavoidable deviations from normal operating schedules. individual requirements of passengers or crew shall not be admissible in this type of message,.4 messages concerning non routine landings to be made by the aircraft,.5 messages concerning aircraft parts and materials urgently required,.6 messages concerning changes in aircraft operating schedules....' request qdm ' is a message relating to direction finding..' turn left heading... ' is a flight safety message. exemple 531 Greater than 'turn left heading...'

Question 283-39 : What does qdm mean ?

Magnetic heading to the station no wind.

Qdm means magnetic heading to the station with no wind... 118..the aircraft is on radial 240° qdr 240° , on a magnetic heading of 360°..if the pilot wants to reach the station, he must follow the qdm 060°... 119..the aircraft is on radial 150° qdr 150° , on a magnetic heading of 060°..if the pilot wants to reach the station, he must follow qdm 150°... 120..the aircraft is on radial 090° qdr 090° , on a magnetic heading of 270°..by following the qdm 270° the pilot will fly over the station. exemple 535 Magnetic heading to the station (no wind).

Question 283-40 : What does qdr mean ?

Magnetic bearing from the station.

Qdr means magnetic bearing from the station... 118..the aircraft is on radial 240° qdr 240° , on a magnetic heading of 360°..if the pilot wants to reach the station, he must follow the qdm 060° qdm means magnetic heading to the station with no wind... 119..the aircraft is on radial 150° qdr 150° , on a magnetic heading of 060°..if the pilot wants to reach the station, he must follow qdm 150°... 120..the aircraft is on radial 090° qdr 090° , on a magnetic heading of 270°..by following the qdm 270° the pilot will fly over the station. we could say that after passing the station, the aircraft will be on radial 270° outbound qdr 270° outbound. if the pilot wants to come back to the station, he will have to turn back and fly on the qdm 090°. exemple 539 Magnetic bearing from the station.


~

Exclusive rights reserved. Reproduction prohibited under penalty of prosecution.

11279 Free Training Exam