Pest Control Aircraft Pilot Practice Test

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What is the maximum recommended length of a spray boom on a fixed wing aircraft as a percentage of its wingspan?

The correct answer is: 75

The maximum recommended length of a spray boom on a fixed-wing aircraft should generally not exceed 75% of its wingspan. This recommendation is based on maintaining safe and effective flight characteristics, as well as maximizing the efficiency of the application process. A spray boom that approaches or exceeds this percentage may compromise the aircraft’s stability, handling qualities, and maneuverability, specifically during turns and climbs. Furthermore, having a spray boom that is too long can lead to increased structural stress on the aircraft, making it more susceptible to mechanical issues. Additionally, there are aerodynamic considerations to take into account, as a longer boom can alter airflow around the wings, which could lead to unexpected flight behavior. Sticking to the 75% guideline helps ensure that the aircraft retains optimal performance while conducting pest control operations.