VOR

Question 1

VOR is short for -

Answer 1

VHF Omnirange

Question 2

Describe the principle of operation in basic terms:

Answer 2

A VOR uses the principle of phase comparison between two signals. One being the reference signal, and the other the directional signal. The phase difference is directly proportional to the magnetic bearing.

Question 3

The actual instrument in the cockpit of a VOR system is called?

Answer 3

a CDI - Course Deviation Indicator

Question 4

the control knob on the CDI is called?

Answer 4

A OBS - Omni Bearing Selector

Question 5

The needle within the CDI is called?

Answer 5

The deviation needle

Question 6

The maximum left/right deviation of a CDI needle -

Answer 6

10°

Question 7

If there are 5 dots presented on the instrument, left and right, each dot will represent?

Answer 7

2°

Question 8

Are radials magnetic or true?

Answer 8

Magnetic.

Question 9

What indications can be expected directly over a VOR and why?

Answer 9

Erratic signals and warning flags due to the cone of ambiguity

Question 10

VOR operate in the frequency spectrum(values) -

Answer 10

108MHz - 117.95MHz

Question 11

List all 3 VOR errors and brief explanation:

Answer 11

1. Site Error:

Reflected signals from building or terrain close to the transmitter.

2. Propagation Error:

Multi path reception from reflected signals due to terrain, this will cause CDI wander or “scalloping”.

3. Interference Error:

Interference from other VORs

Question 12

What indications can be expected directly over a VOR and why?

Answer 12

Erratic signals and warning flags due to the cone of ambiguity

Question 13

Describe the RMI:

Answer 13

The RMI can display both ADF and VOR informations. It combines VOR and/or ADF information with aircraft heading. The aircraft heading will be shown on the lubber line and ADF information will be QDM.