Maintenance and Modifications
Bug Residue Measurably Increases Aircraft Drag, Fuel Burn
Operators face hidden costs from seasonal insect activity
An aircraft being washed on the ground
© Nordic Dino

Insect contamination on aircraft surfaces during peak bug activity seasons can significantly degrade aerodynamic efficiency and increase fuel consumption, according to recent research. A surprisingly low number of insect impacts on natural laminar flow (NLF) areas—such as wing leading edges and nose surfaces—can raise fuel burn by 1.1% to 4.4%, depending on flight length.

During warm months in many regions and throughout monsoon periods in parts of Asia, aircraft accumulate bug residue, primarily during ground roll, initial climb, approach, and landing. Estimates suggest that 50% to 60% of the contamination occurs during the takeoff ground run, with the remainder during low-altitude phases of flight.