BGS Feedback Questions Flashcards
Maximum endurance for a piston engine aeroplane is achieved at:
The speed that approximately corresponds to the best ROC.
What is the approximate value of VMD for a PROPrelative to the stall speed VS, aircraft clean.
VMD = 1.3Vs
What is the approximate value of VMD for a JET relative to the stall speed VS, aircraft clean.
VMD = 1.6Vs
A jet aeroplane descends with constant Mach number. Which speed limit will be exceeded?
VMO
Compared with balanced-field calculations for an aerodrome with no stopway or clearway, the use of a clearway in the take-off calculations will:
Increase the field-length-limited take-off mass.
Which of the following sets of factors will increase the climb-limited TOM
Low flap setting, low PA, low OAT.
CLLTOM
Independent of wind. It is an air gradient requirement.
Depends on pressure altitude and OAT.
Increasing flap increases the parasite drag which degrades the climb gradient and thus the CLTOM decreases.
With regard to the performance limited take-off mass: It is the lowest of the FLLTOM, the CLTOM or the OLTOM.
The one engine out take-off run is the distance between the brake release point and:
The middle of the segment between VLOF point and 35 ft point.
Specific Range
Still air distance travelled per unit of fuel.
The SI unit is NM/KG.
Gradient from Glideslope:
Input TAN GS x 100 = Gradient
Example, EGLC has a 5.5deg glideslope.
TAN 5.5 x100 = 9.6%
A balanced field is contaminated with COMPACTED SNOW what will happen to the TODR and the ASDR?
TODR stays constant and the ASDR increases.
Specific Fuel Consumption
Mass of fuel used to produce “X” amount of thrust/power per unit of time.
The SI units are KG/per Newtons of thrust per hour.
In certain conditions V2 can be limited by VMCA:
Low take-off mass, LARGE FLAP extension, low field elevation.
Is credit given for the use of Reverse Thrust in performance calculations?
No credit is given for the use of reverse thrust on a dry runway when calculating the ASDR.
ONLY on a wet runway.
Which data can be extracted from the Buffet Onset Boundary Chart?
BOBs define the safety margins at 1.3g to the low speed and high speed buffet boundaries at various weights and altitudes. Additional graphs for severe turbulence are drawn for 1.6g
A ‘Balanced Field Length’ is said to exist where:
Where TODA=ASDA we have a balanced field and a balanced V1.
This means that with a field length limited MTOM the VGO distance equals the VSTOP distance.
For an aircraft climbing at a constant IAS and a constant mass the drag will:
Increase initially and then decrease.
Factors used to determine the Quick Turnaround Limit.
OAT Flap setting Runway slope Wind component. Pressure Altitude
The minimum value of V2 must exceed VMC by:
10% - 1.1
Hydroplaning Formula
9 x √p
p - tyre pressure in psi
Field Length Limited TOM
Limited by the TODA, TORA and ASDA, either all engines or engine out.
Obstacle Limited TOM
Mass limited by the requirement (Class A) to clear obstacles by 35ft net in straight flight up to at least 1500’ above the aerodrome
The Climb Limited TOM
Mass limited by the requirement to make the minimum regulatory gradients in the take-off flight path, usually the second sector requirement is limiting.
Also known as the WAT limit because Weight Altitude and Temperature are three variables that affect climb gradient.
The ‘climb gradient’ is defined as the ratio of:
The increase of altitude to horizontal air distance expressed as a percentage
Where is the ratio of Thrust Required to TAS a minimum?
Maximum range speed.
If the V1 and FLLTOM have been calculated using the balanced field technique what will be the influence on V1 and the FLLTOM if the clearway is increased?
V1 decreases, TOM increases.
Select the correct statement regarding flight below VMD.
Thrust required increases and CL increases.
A balanced field take-off is:
OEI TODR = the OEI ASDR
