Maximum gross takeoff weight at high density altitude

Remote Pilot (Part 107) practice question 15 of 25 on Loading and Performance. ACS element UA.IV.A.K1a · difficulty: standard. Want to answer it in a timed quiz? Use the Remote Pilot (Part 107) practice mode.

Question bank updated 2026-09-22

QUESTIONA remote pilot plans to launch at the maximum gross takeoff weight from a high-elevation site on a hot, humid day. What does the Remote Pilot study guide say about this plan?

  1. AThe maximum gross takeoff weight is always safe when it is not exceeded
  2. BThe high humidity will offset the effect of the high temperature
  3. CA reduction in weight before flight may be required
Show the answer and explanation

Correct answer: C. A reduction in weight before flight may be required

  • A — incorrect The guide states that the aircraft may not always safely take off with the maximum load under all conditions.
  • B — incorrect High humidity adds to, rather than offsets, the conditions that raise density altitude and degrade takeoff and climb performance.
  • C — correct The guide says that although a maximum gross takeoff weight may be specified, high elevations, high temperatures and high humidity (high density altitude) may require a reduction in weight before flight.

BACKGROUND

The Remote Pilot study guide explains that even when a maximum gross takeoff weight is specified, the aircraft may not always safely take off with that load under all conditions. Conditions that affect takeoff and climb performance, such as high elevations, high air temperatures and high humidity (high density altitudes), may require a reduction in weight before flight. Other factors to consider are the launch area length, surface, slope, surface wind and the presence of obstacles. These too may require a reduction in weight prior to flight.

STUDY TIP

Treat the maximum gross weight as an upper bound, not a guarantee; hot, high and humid conditions call for a lighter aircraft.

KEY POINTS

  • Maximum gross takeoff weight is not always safe in every condition.
  • High elevation, temperature and humidity may require a weight reduction.
  • Launch area length, surface, slope, wind and obstacles also matter.

SOURCES

  • remote_pilot_study_guide.txt ch4 "Introduction"
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SkyDrill is not affiliated with the FAA. This is an original practice item based on 14 CFR part 107, 14 CFR part 89, and the FAA Remote Pilot – Small UAS Study Guide (FAA-G-8082-22). Regulations and handbooks are revised; confirm details against the current edition.