Patent GB-569249-A (GB)
Title: Improvements in aviation trainer
IPC: G09B9/20
Filed: 1943-05-26
Abstract: 569,249. Apparatus for training aviators. LINK AVIATION DEVICES, Inc. May 26, 1943, No. 8419. Convention date, June 29, 1942. [Class 4] An apparatus for training aviators, of the kind described in Specifications 370,128 and 481,375, incorporates means whereby the effect on a multi-engined aircraft of the engine throttle settings may be simulated. Dummy throttle levers 54, 56, are respectively connected by links 62, 68, and 63, 69, to an arm 70 on a disc valve 72 which is free to slide in guides 79. The valve comprises three ported discs which can be put into communication with the atmosphere, or a suction source through a connection 148. Movement of the throttle levers is transmitted through a link 78, attached to the middle of the arm 70, and members 80, 82, 88, 90, 55, 49, 48, 44, to a bellows 30, connected to a suction source 24 by a pipe 28 and carrying an air speed indicator 32. The members 44, 48 are attached to a spring 46, the tension in which, due to movement of the throttle levers, determines the extent of opening of a needle valve in the bellows attached to the rod 44, by means of which the reading of the air speed indicator is governed. In order to simulate the effect on the air speed indicator of variations in the attitude of an aircraft, movement of the training apparatus about a transverse axis effects rotation of a shaft 210, which movement is transmitted to the members 48, 44, to operate the bellows 30 by means of 'the links 50, 55, 49. A pressure tank 92 fitted with an altimeter 94, vertical speed indicator 96, climb valve 100, and dive valve 102, as described in Specification 481,375, is provided in order to simulate the response of the instruments to variations in throttle settings. The valves 100, 102 are actuated through pivoted arms 110, 112, by a reciprocating rod 115 connected to the arm 50 by a link 116. Movements of the throttle levers are transmitted by means of the members 78, 90, 116, to the reciprocating member 115 whereby one or other of the valves 100, 102, is actuated to bring about the appropriate response of the altimeter and vertical speed indicator. The effect on these instruments of climbing and diving is simulated by rotation of the shaft 210, which actuates the climb and dive valves through the members 50, 116, 115. The turning effect on an aircraft of unequal throttle settings is demonstrated by connecting the valve 72 by means of pipes 172, 174, to bellows 176, 178, associated with the rudder pedals 192, 194, and the rudder bar 186. Movements of the throttle levers actuate the valve 72. by which one of the rudder bellows is put into communication with the suction source 148, and the other with the atmosphere, the consequent movement of the bellows being transmitted through links 184, 185, to the rudder bar 186, by means of which the fuselage of the training apparatus is rotated about a vertical axis. The application of suction to one of the rudder bellows and of atmospheric pressure to the other causes forces to be transmitted to the rudder pedals similar to the forces which are brought into play in an aircraft due to unequal throttle settings. Specification 569,248 also is referred to.