Wind, Gusts, and Terrain
Read sustained wind, gust spread, terrain flow, mechanical turbulence, and return-leg exposure rather than one headline number.
YOU WILL BE ABLE TO
- 01Identify the rule, source, or principle behind this idea: Buildings, trees, ridges, and gaps can accelerate or disrupt airflow close to the surface.
- 02Explain the operational effect of this idea: The leeward side of terrain can contain turbulence and downdrafts, but the flow should not automatically be labeled katabatic.
- 03Apply the lesson to a new mission and defend a go, modify, or no-go decision.
01 / MISSION
Begin with the operating problem.
A ridge mission begins downwind with a small battery penalty, while gusts are increasing.
02 / CORE BRIEF
What the remote pilot needs to know.
Buildings, trees, ridges, and gaps can accelerate or disrupt airflow close to the surface.
The leeward side of terrain can contain turbulence and downdrafts, but the flow should not automatically be labeled katabatic.
An outbound tailwind becomes a return headwind and can consume the reserve unexpectedly.
03 / PILOT DECISION
Make the call.
Plan the energy-demanding leg first, shorten distance, increase reserve, or postpone when return performance is uncertain.
04 / FIELD CHECK
Put it into the flight plan.
Compare wind direction with terrain, route direction, aircraft limit, and reserve at every launch site.
05 / KNOWLEDGE CHECK
Why is an easy downwind outbound leg a battery risk?
Reveal the debrief
The aircraft may face a stronger headwind while returning with less energy available.
RELATED FAA REFERENCES
Verify before you fly.
Educational summary only. Current regulation, FAA approval conditions, manufacturer instructions, and site-specific facts control the operation.