BGS Feedback Questions

Question 1

Maximum endurance for a piston engine aeroplane is achieved at:

Answer 1

The speed that approximately corresponds to the best ROC.

Question 2

What is the approximate value of VMD for a PROPrelative to the stall speed VS, aircraft clean.

Answer 2

VMD = 1.3Vs

Question 3

What is the approximate value of VMD for a JET relative to the stall speed VS, aircraft clean.

Answer 3

VMD = 1.6Vs

Question 4

A jet aeroplane descends with constant Mach number. Which speed limit will be exceeded?

Answer 4

VMO

Question 5

Compared with balanced-field calculations for an aerodrome with no stopway or clearway, the use of a clearway in the take-off calculations will:

Answer 5

Increase the field-length-limited take-off mass.

Question 6

Which of the following sets of factors will increase the climb-limited TOM

Answer 6

Low flap setting, low PA, low OAT.

Question 7

CLLTOM

Answer 7

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.

Question 8

The one engine out take-off run is the distance between the brake release point and:

Answer 8

The middle of the segment between VLOF point and 35 ft point.

Question 9

Specific Range

Answer 9

Still air distance travelled per unit of fuel.

The SI unit is NM/KG.

Question 10

Gradient from Glideslope:

Answer 10

Input TAN GS x 100 = Gradient

Example, EGLC has a 5.5deg glideslope.

TAN 5.5 x100 = 9.6%

Question 11

A balanced field is contaminated with COMPACTED SNOW what will happen to the TODR and the ASDR?

Answer 11

TODR stays constant and the ASDR increases.

Question 12

Specific Fuel Consumption

Answer 12

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.

Question 13

In certain conditions V2 can be limited by VMCA:

Answer 13

Low take-off mass, LARGE FLAP extension, low field elevation.

Question 14

Is credit given for the use of Reverse Thrust in performance calculations?

Answer 14

No credit is given for the use of reverse thrust on a dry runway when calculating the ASDR.

ONLY on a wet runway.

Question 15

Which data can be extracted from the Buffet Onset Boundary Chart?

Answer 15

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

Question 16

A ‘Balanced Field Length’ is said to exist where:

Answer 16

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.

Question 17

For an aircraft climbing at a constant IAS and a constant mass the drag will:

Answer 17

Increase initially and then decrease.

Question 18

Factors used to determine the Quick Turnaround Limit.

Answer 18

OAT
Flap setting
Runway slope
Wind component.
Pressure Altitude

Question 19

The minimum value of V2 must exceed VMC by:

Answer 19

10% - 1.1

Question 20

Hydroplaning Formula

Answer 20

9 x √p

p - tyre pressure in psi

Question 21

Field Length Limited TOM

Answer 21

Limited by the TODA, TORA and ASDA, either all engines or engine out.

Question 22

Obstacle Limited TOM

Answer 22

Mass limited by the requirement (Class A) to clear obstacles by 35ft net in straight flight up to at least 1500’ above the aerodrome

Question 23

The Climb Limited TOM

Answer 23

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.

Question 24

The ‘climb gradient’ is defined as the ratio of:

Answer 24

The increase of altitude to horizontal air distance expressed as a percentage

Question 25

Where is the ratio of Thrust Required to TAS a minimum?

Answer 25

Maximum range speed.

Question 26

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?

Answer 26

V1 decreases, TOM increases.

Question 27

Select the correct statement regarding flight below VMD.

Answer 27

Thrust required increases and CL increases.

Question 28

A balanced field take-off is:

Answer 28

OEI TODR = the OEI ASDR