Home › Part 107 Practice Tests › Loading, Performance & Airport Operations Questions › Question 33
How does a high density altitude affect a multirotor's climb and hover performance?
- A.Climb improves because the air offers less drag
- B.Hover requires less power in thin air
- C.Climb rate and hover margin decrease because propellers and motors are less effective
Correct answer
C. Climb rate and hover margin decrease because propellers and motors are less effective
Why
In thin air each propeller revolution produces less thrust, so the motors must work harder for the same lift. The aircraft hovers closer to its power ceiling and climbs more slowly.
Source: FAA-G-8082-22 Ch. 8 · ACS knowledge area: Determining the Performance of an sUAS · From the Loading, Performance & Airport Operations practice bank (PER-033).