Aircraft Centre of Gravity Quiz

The centre of gravity limits are described in the aircraft flight manual (AFM) in section:

• Limitations

• Emergency Procedures

• Performance

• Normal Procedures

The permissible CG range can be found in...

• The Aircraft Flight Manual (AFM).

• The aircraft technical log.

• The checklist.

• The minimum equipment list (MEL).

The centre of gravity of a body is that point:

• through which the sum of the forces of all masses of the body is considered to act.

• which is always used as datum when computing moments.

• where the sum of the external forces is equal to zero.

• where the sum of the moments from the external forces acting on the body is equal to zero.

Select the correct statement for the Datum:

• Is a fixed vertical plane from which all the arm distances are measured.

• Is a point from which all the arm distances are measured.

• Is a vertical plane through which all the forces of gravity are said to act.

• Is the point through which all the forces of gravity are said to act.

A helicopter has the datum 4 metres in front of the rotor mast and its Centre of Gravity at +3.7 metres. The same helicopter with the same data has now the datum at the rotor mast. What will happen with the Centre of Gravity?

• CG will be at -0.3.

• CG cannot be determined and the helicopter should be weighed again.

• The information given is not enough to determine the CG.

• CG will be at -3.7.

Which one of the following is correct?

• Arm = Moment/Force

• Moment = Force/Arm

• Arm = Force x Moment

• Arm = Force/Moment

The longitudinal reference (datum line) for determining the Moment Arm is generally located:

• forward of the helicopter.

• at the centre of gravity.

• aft of the helicopter.

• below the rotor centre.

The weight of an aircraft, which is in level non accelerated flight, is said to act:

• vertically through the centre of gravity.

• always along the vertical axis of the aeroplane.

• vertically through the datum point.

• vertically through the centre of pressure.

Documented and known modifications were executed in an aircraft. Does this aircraft need to be reweighed when 3 years have passed?

• According to EASA OPS regulations, it doesn't have to be reweighed.

• It has to be reweighed in 6 years time.

• It has to be reweighed after every modification.

• It has to be reweighed every 12 months.

Where are the basic empty mass (BEM) and the basic empty mass center of gravity (CG) position noted?

• Weighing report

• Certificate of airworthiness

• Cargo manifest

• Load and trim sheet