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Among the modifications in the new version were all-aluminum rotor blades, a 115 hp (86 kW) OMC 2-cycle engine (Evinrude Vulcan V-4 outboard motor) and a heavier drive system (shafts and bearings). In 1971, the Scorpion II was introduced with an OMC 125 hp (93 kW), 2-cycle engine which provided enough power to fly two lightweight people, unlike ...
Rotordynamics (or rotor dynamics) is a specialized branch of applied mechanics concerned with the behavior and diagnosis of rotating structures. It is commonly used to analyze the behavior of structures ranging from jet engines and steam turbines to auto engines and computer disk storage.
A static balance (sometimes called a force balance [2] [3]) occurs when the inertial axis of a rotating mass is displaced from and parallel to the axis of rotation.Static unbalances can occur more frequently in disk-shaped rotors because the thin geometric profile of the disk allows for an uneven distribution of mass with an inertial axis that is nearly parallel to the axis of rotation.
The Exec 162F is the latest in the Exec series of helicopters manufactured by RotorWay International. The RotorWay Scorpion design was updated with an aluminum tail and full fiberglass cockpit enclosure to become the Exec. [1]
Tip weights were added to the R22 to increase rotor inertia, [6] but the small rotor limits weight. [ 7 ] The first R22 sold, October, 1979, S/N 003, N1010WR, was purchased by Pacific Wing and Rotor, Inc., represented by Tim Tucker who later became a test pilot and chief instructor for Robinson.
In a soft-bearing machine, balancing is done at a frequency higher than the resonance frequency of the suspension. The suspension's displacement is dictated by the distance of the rotor's principal axis of inertia relative to the rotor's rotational axis defined by the rotor bearings. Both types of machines have various advantages and disadvantages.
The tail rotor is a smaller rotor mounted so that it rotates vertically or near-vertically at the end of the tail of a traditional single-rotor helicopter. The tail rotor's position and distance from the center of gravity allow it to develop thrust in a direction opposite that of the main rotor's rotation, thereby countering the torque effect ...
An absolute encoder maintains position information when power is removed from the encoder. [5] The position of the encoder is available immediately on applying power. The relationship between the encoder value and the physical position of the controlled machinery is set at assembly; the system does not need to return to a calibration point to maintain position accuracy.