LTE type associated with high altitude.

LTE type associated with high altitude.

• A. Main Rotor Vortex Interference
• B. Tail Rotor Vortex Ring State
• C. Weathercock Stability
• D. LTE at Altitude

Answer: (D)

Loss of Tail Rotor Effectiveness (LTE) at altitude is the situation where tail rotor authority is reduced as you climb to higher elevations due to thinner air. This makes the helicopter harder to yaw controllably, especially at low airspeeds or in hover, when the tail rotor must provide most of the yaw control. At altitude, the tail rotor must work against lower air density and potentially higher power loading, so its thrust is limited, which is why LTE at altitude is the type associated with high altitude. The other items describe different rotor-related phenomena or stability concepts that aren’t the standard label for a tail-rotor problem caused by high altitude, so they don’t fit as the type of LTE.

Loss of Tail Rotor Effectiveness (LTE) at altitude is the situation where tail rotor authority is reduced as you climb to higher elevations due to thinner air. This makes the helicopter harder to yaw controllably, especially at low airspeeds or in hover, when the tail rotor must provide most of the yaw control. At altitude, the tail rotor must work against lower air density and potentially higher power loading, so its thrust is limited, which is why LTE at altitude is the type associated with high altitude.

The other items describe different rotor-related phenomena or stability concepts that aren’t the standard label for a tail-rotor problem caused by high altitude, so they don’t fit as the type of LTE.