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Changes to the aircraft flight control system transmit mechanically to the rotor, producing aerodynamic effects on the rotor blades that make the helicopter move in a desired way. To tilt forward and back (pitch) or sideways (roll) requires that the controls alter the angle of attack of the main rotor blades cyclically during rotation, creating ...
A blisk (portmanteau of bladed disk) is a turbomachine component comprising both rotor disk and blades as a single part instead of a disk assembled with individual removable blades. Blisks generally have better aerodynamics than conventional rotors with single blades and are lighter.
The term rigid rotor usually refers to a hingeless rotor system [16] [17] with blades flexibly attached to the hub. Irv Culver of Lockheed developed one of the first rigid rotors, which was tested and developed on a series of helicopters in the 1960s and 1970s. In a rigid rotor system, each blade flaps and drags about flexible sections of the root.
The larger Switchblade 600 loitering munition weighs 54.5 kg (120 lb) including the all-up round in the tube and FCS; [52] the airframe weighs 22.7 kg (50 lb), with the fire control system consisting of a tablet and long-range antenna. [53] The system is man-portable and can be set up in 10 minutes.
Some rotary wing aircraft are designed to stop the rotor for forward flight so that it then acts as a fixed wing. For vertical flight and hovering it spins to act as a rotary wing or rotor, and for forward flight at speed it stops to act as a fixed wing providing some or all of the lift required. Additional fixed wings may also be provided to ...
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The four wheel drive system was a newer version of Ford's "Control Trac" 4x4 system, dubbed the Control Trac II 4WD in the Escape. This system allowed the front wheels to receive 100% of the torque until a slip was detected. Using a Rotary Blade Coupling, the rear wheels could be sent up to 100% of the power in fractions of a second.
A solution is the independent actuation of the blades which have been recently patented and successfully tested for naval use [10] by use on hydraulic actuation system. The horizontal axis of rotation always provides an advancement of the upper blades, that produce always a positive lift by the full rotor. [ 11 ]