Joined: 11 Dec 2005
|Posted: Tue Apr 17, 2012 3:56 pm Post subject: Questions on Landing Performance
| Landing Field Length Requirements - SEP and MEP
a) The landing distance, from a screen height of 50 ft, must not exceed 70% of the landing distance available, i.e. a factor of 1.43.
b) If the landing surface is grass up to 20 cm long on firm soil, the landing distance should be multiplied by a factor of 1.15.
c) If the METAR or TAF or combination of both indicate that the runway may be wet at the estimated time of arrival, the landing distance should be multiplied by a factor of 1.15.
d) The landing distance should be increased by 5% for each 1% downslope. No allowance is permitted for upslope.
The landing reference speed VREF has, in accordance with international requirements, "30%" margins above stall speed in landing configuration.
VREF for a Class B aircraft is defined by 1.3 VS
What landing distance requirements must be met at an alternate airfield compared to a destination airfield for a turbo prop? "Same as destination"
For a turbo prob powered aeroplane, a 2200 m long runway at the destination aerodrome is expected to be wet. The dry runway landing distance, should not exceed:
a) 1339m <-- Correct
Factor for dry runway = 1.43
Factor for wet runway = 1.43 x 1.15 = 1.64
For reducing the runway length: 2200 / 1.64 = 1341m
When approaching a wet runway, with the risk of hydroplaning, what technique should the pilot adapt? "Positive touch down, full reverse and brakes as soon as possible"
If the airworthiness documents do not specify a correction for landing on a wet runway; the landing distance must be increased by: 15%
Approaching in turbulent wind conditions during manual flight requires
a) an increase in approach speed <-- Correct
b) an increase in VREF
If a turbo prop aircraft has a wet LDA of 2200m, what would the equivalent dry landing distance allowed be?
a) 1339 m <-- Correct
b) 1540 m
c) 1148 m
d) 1913 m
The wording of the question is not correct. A similar question with the proper wording is:
"For a turboprop powered aeroplane, a 2200m long runway at the destination aerodrome is expected to be "wet". The "dry runway" landing distance, should not exceed?"
2200/1.64 = 1341m
In wet conditions what extra percentage over the calculated (gross) landing distance must be available for a turbojet?
a) 92% <-- Correct
The approach climb requirement has been established so that the aeroplane will achieve: "minimum climb gradient in the event of a go-around with one engine inoperative"
A flight is planned with a turbojet aeroplane to an aerodrome with a landing distance available of 2400 m. Which of the following is the maximum landing distance for a dry runway?
a) 1440m <-- Correct
Jets are supposed to used 60% of LDA to cater for safety margins. So the factor is 60/100 = 0.6
2400 x 0.6 = 1440
In dry conditions, when landing at an alternate airport in a turbojet by what factor should the landing distance available changed to give landing distance?
a) 0.6 <-- Correct
LDA x 0.6 or LDA/1.67 is the same thing so option (c) is also correct unless the question specifies whether multiplication or division is to be used.
Perhaps there is a typographical error in this question becuase another similar question is more clear about this as it states:
"By what factor must the landing distance available (dry runway) for a turbojet powered aeroplane be multiplied to find the landing distance required?"
The answer for that is 0.6
What margin above the stall speed is provided by the landing reference speed VREF? "1.30 VSO"
The landing reference speed VREF may not be less than: "1.23 VSRO and must be maintained down to 50 ft height"
Be careful about VSO and VSR. e.g. one question states:
At a given mass, the reference stall speed of a twin engine turboprop aircraft is 100 kt in the landing configuration. The minimum speed a pilot must maintain in short final is?
Since the question mentions Reference Speed VSR and not VSO the amswer is:
100 x 1.23 = 123 kts (and not 100 x 1.3)
The maximum mass for landing could be limited by:
a) the climb requirements with one engine inoperative in the approach configuration <-- Correct
b) the climb requirements with one engine inoperative in the landing configuration
In addition to other requirements, the approach climb requirement is based on: "one engine out, flaps APPROACH and gear UP"
Which of the following statements is correct with regard to the approach to landing climb requirements?
a) Fuel dumping may be necessary in emergency situation <-- Correct
b) These requirements are based on the following configuration; flaps in landing position and landing gear retracted
c) These requirements are more easily accomplished with two engine aeroplane than with a four engine aeroplane
d) These requirements cannot be accomplished with masses higher than maximum approved landing masses
For a turbo jet aircraft planning to land on a wet runway, the landing distance available:
a) may be less than 15% greater than the dry landing distance if the flight manual gives specific data for a wet runway<--Correct
b) must always be at least 15% greater than the dry landing distance
c) may be less than 15% greater than the dry landing distance if permission is obtained from the relevant aerodrome authority
d) may be less than 15% greater than the dry landing distance if all reverse thrust systems are operative
The estimated braking action for a runway having a friction coefficient of 0.35 would be: "Medium"
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