A remote pilot is hired for a winter construction progress shoot in northern Wisconsin. Temperature is 18°F with 75% relative humidity, no precipitation, and light winds. The batteries have been in the vehicle overnight. What pre-flight decisions are most important?

Question

Accepted Answer

Pre-warm the batteries to manufacturer's recommended operating range and plan for reduced flight time; visible moisture and near-freezing temperatures create icing risk for the airframe. LiPo batteries deliver significantly reduced voltage and capacity when cold-soaked, often triggering low-voltage alarms mid-flight even on a full charge. Manufacturers typically specify a warmed operating temperature. In conditions near freezing with high humidity, ice can accrete on rotor blades and airframe surfaces even without visible precipitation, degrading lift. Part 107 has no temperature prohibition; the decisions are performance and safety judgments, not regulatory ones.

Answer

Proceed normally; LiPo batteries are rated for operation down to 0°F by most manufacturers

Answer

Cancel the flight; operating below 32°F is prohibited by Part 107 for small UAS