Pest Control Aircraft Pilot Practice Test

On a rotary wing aircraft, the spray boom should not exceed what percentage of the main rotor width?

1. 80

2. 85

3. 90

4. 95

The correct answer is: 90

The correct choice indicates that the spray boom on a rotary wing aircraft should not exceed 90% of the main rotor width. This guideline is critical for several reasons. Maintaining the spray boom within this percentage ensures that the aircraft's aerodynamic performance is not compromised. A boom that is too wide can lead to increased drag and instability during flight, particularly when making turns or during varied flight maneuvers. Wider booms can also create challenges with the aircraft's balance and control, impacting its ability to perform safely and effectively. Furthermore, adhering to this specification helps to optimize the distribution of the pesticide or other substances being sprayed. Proper positioning relative to the rotor width aids in achieving an even spray pattern and reduces the risk of off-target drift, which is essential in pest control operations to ensure both efficacy and environmental safety. Regulatory guidelines and best practices in aerial application emphasize these limitations to enhance safety for both the pilot and the operational environment while achieving effective pest control results.