What is the maximum airspeed limit when extending the Search Light?

What is the maximum airspeed limit when extending the Search Light?

• A. 110 knots
• B. 120 knots
• C. 100 knots
• D. 90 knots

Answer: (C)

Extending the search light subjects the light and its mount to aerodynamic forces that increase with airspeed. The extension is designed to operate safely up to a certain wind loading, and about 100 knots is the limit where those loads stay within the system’s structural and electrical tolerances. At higher airspeeds, the extended light experiences greater gust and buffeting forces, which can cause excessive vibration, binding, or damage to the light, its wiring, or its mounting, and can make aiming and stowage unstable. Keeping speed to 100 knots or less ensures the extension can operate smoothly and safely. If higher airspeed is required, retract the light and extend only after reducing airspeed.

Extending the search light subjects the light and its mount to aerodynamic forces that increase with airspeed. The extension is designed to operate safely up to a certain wind loading, and about 100 knots is the limit where those loads stay within the system’s structural and electrical tolerances. At higher airspeeds, the extended light experiences greater gust and buffeting forces, which can cause excessive vibration, binding, or damage to the light, its wiring, or its mounting, and can make aiming and stowage unstable. Keeping speed to 100 knots or less ensures the extension can operate smoothly and safely. If higher airspeed is required, retract the light and extend only after reducing airspeed.