Abstract: The rotor damping and control power value can be made arbitrary by controlling a cyclic pitch control mechanism with a signal proportional to the angular acceleration of the attitude angle .theta., a signal proportional to the angular velocity of the attitude angle .theta., and a correction signal based upon the difference between the attitude angle .theta. and assumed attitude angle .theta..sub.0, plus the cyclic pitch control input .PSI. applied to a cyclic pitch lever of a pilot. Thus, the rotor damping and control power are brought to their optimum values in response to the actual flight conditions of a helicopter for ideal operability, resulting in both high stability and operability, and, for example, fully automatically controlled hovering can be accomplished without producing any vibration in the attitude angle control response.

Abstract: A golf trainer includes magnetic sensors for detecting the passage of a golf club head and is provided with a device for electronically measuring the speed of the club. The carry of the ball is also calculated, except when the club selected for use is a putter, from data regarding the club selected and the characteristics of the speed of this club versus the carry of the ball.

Abstract: A golf trainer includes one or more magnetic sensors disposed at predetermined locations relative to an ideal swing path of a golf club head. The outputs of the magnetic sensors are amplified and processed to calculate such parameters as the club head velocity, swing orbit, face angle, and ball carry, as examples. A suitable display device is used to provide the trainer user with instantaneous feedback relative to the success of a given practice swing.

Abstract: Rotary wing aircrafts comprise a fuselage having a rotor driving mast extending substantially vertically. A rotor comprising a plurality of rotors is mounted on the mast for at least feathering and flapping movement. The flapping hinge is offset radially outwardly from the axis of rotation. Further, the rotor blades have weights mounted on the outboard tip ends thereof. The arrangement provides a significantly improved controllability of the aircraft.

Abstract: A golf trainer is provided with sensors arranged in a bifurcated sensor case which is interposed with support portions formed in a base. The base holds the sensor case such that spaces are formed between the sensor case and an overlying shock-resistant material and artificial turf surface. The signals output by the sensors are processed and used to display various information relative to a club swing.

Abstract: A device for holding a sheet-like sample includes table means including a reference surface capable of intimately contacting the surface of the sample and a groove formed in the reference surface and capable of being covered by the surface of the sample during the intimate contact, the groove being formed in the shape of a continuous spiral having its center substantially at the center of the reference surface, and exhaust means for exhausting the air in the groove covered by the surface of the sample.

Abstract: A horizontal multiple-chamber, packed column structure for adsorptive separation process wherein loading and unloading of packing material is facilitated, and efficient, effective contact between the packing material and a fluid passing therethrough is provided by the configuration and placement of a fluid inlet and distributor at one end thereof and fluid collector and fluid outlet at the horizontally opposite end, each chamber also including a plurality of axially extending rods to maintain a relatively uniform packing density of packing material in the chamber.