A2 CofC - Drone Certificate of Competency UAS Flight Performance Principles Questions and Answers

Question 1

A remote pilot attaches an aftermarket payload to their UAS, causing the Centre of Gravity (CG) to shift significantly behind the manufacturer's recommended aft limit.
What is the most likely flight characteristic they will experience?

Accepted Answer

A tendency for the UAS to pitch up and reduced longitudinal stability.

Answer

Increased longitudinal stability and sluggish pitch control.

Answer

Improved forward flight speed due to better aerodynamics.

Answer

No noticeable change, as the flight controller will compensate.

Question 2

If the take-off mass of a multirotor UAS is significantly increased by adding a heavy camera, which of the following performance changes is most likely to occur?

Accepted Answer

Greater resistance to changing direction and reduced flight endurance.

Answer

Increased agility and faster response to control inputs.

Answer

Longer flight duration due to increased momentum.

Answer

A lower power requirement for take-off.

Question 3

During a co-ordinated level turn, a remote pilot banks their UAS at a 60-degree angle. What is the approximate load factor experienced by the aircraft's structure?

Accepted Answer

2G

Answer

1G

Answer

1.5G

Answer

4G

Question 4

A remote pilot plans a flight on a cold winter day in the UK, with an ambient temperature of 2°C. The LiPo batteries for their UAS have been stored in their vehicle overnight. What is the most significant impact this will have on flight performance?

Accepted Answer

The battery's chemical reaction will be slower, leading to a significant voltage drop and reduced flight time.

Answer

The battery will provide a higher voltage, increasing motor performance.

Answer

The cold, dense air will improve propeller efficiency, extending the flight time.

Answer

The flight controller may report an inaccurate battery level, but performance will be unaffected.

Question 5

Which of the following environmental conditions would result in the highest performance from a UAS's motors and propellers?

Accepted Answer

Low altitude on a cold, dry day.

Answer

High altitude on a hot, humid day.

Answer

Low altitude on a hot, humid day.

Answer

High altitude on a cold, dry day.

Question 6

When operating a fixed-wing UAS, what is the direct effect on its stall speed when it enters a co-ordinated, level turn?

Accepted Answer

The stall speed increases due to the increased load factor.

Answer

The stall speed decreases because the inner wing is moving slower than the outer wing.

Answer

The stall speed remains the same regardless of bank angle.

Answer

The stall speed is only affected by the aircraft's mass, not the turn itself.