FH.VII.B.R6
Risk managementMain rotor(s), tail rotor, and tail strike hazards, as applicable.
From the FAA library
- Chapter 11: Helicopter Emergencies and Hazards › Autorotation › Technique (How to Practice)
When the collective is raised, the opposite antitorque pedal used in powered…
- Chapter 2: Aerodynamics of Flight › Hovering Flight › Translating Tendency (Drift)
Translating Tendency (Drift) During hovering flight, a single main rotor helicopter tends to move in the direction of tail rotor thrust. This lateral (or sideward) movement is called translating tendency. [Figure 2-27] To counteract this tendency, one or more ... following features may be used. All examples are for a counterclockwise rotating main rotor disk. Figure 2-27. A tail rotor is designed to produce thrust in a direction opposite torque. The thrust produced by the tail rotor is sufficient…
- Chapter 11: Helicopter Emergencies and Hazards › System Malfunctions › Loss of Tail Rotor Effectiveness (LTE)
catastrophic. LTE is an aerodynamic condition and is the result of a control margin deficiency in the tail rotor. It can affect all single-rotor helicopters that utilize a tail rotor. The design of main and tail rotor blades ... tail boom assembly can affect the characteristics and susceptibility of LTE but will not nullify the phenomenon entirely. Translational lift is obtained by any amount of clean air through the main rotor disk. Chapter 2, Aerodynamics of Flight, discusses translational…
- Chapter 3: Helicopter Flight Controls › Antitorque Pedals › Heading Control
Heading Control The tail rotor is used to control the heading of the helicopter while hovering or when making hovering turns, as well as counteracting the torque of the main rotor. Hovering turns are commonly referred to as “pedal turns ... cyclic control is used to change heading by making a turn to the desired direction. The thrust of the tail rotor depends on the pitch angle of the tail rotor blades. This pitch angle can be positive, negative, or zero…
- Chapter 1: Introduction to the Helicopter › Rotor System › Intermeshing Rotors
shafts connected at both ends with flexible couplings. The flexible couplings allow the drive shaft to flex with the tail boom. Figure 1-7. Coaxial rotors. Figure 1-8. HH-43 Huskie with intermeshing rotors. Figure 1-9. Basic tail ... rotor components. The gearbox at the end of the tail boom provides an angled drive for the tail rotor and may also include gearing to adjust the output to the optimum rotational speed typically measured in revolutions per minute…