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| Keywords: RCEscapement.png Radio control escapement Used in model airplane and watercraft control ca 1950 - 1965<br> A spring is used to return the stop to the neutral position when<br> the electromagnet coil is not energized<br><br> Operation sequence reads clockwise from upper left 1 Escapement at rest neutral<br><br> 2 Escapement coil energized left for example <br><br> 3 Escapement at rest second neutral<br><br> 4 Escapement coil energized right for this example <br><br> Variations Compound escapement By putting a sight offset e g toward the viewer in one arm of the rotating blade and cutting back on the rest inactive coil stop the device would have only one neutral stop One directional stop is then always selected on the first pulse and hold To select the other direction from this single neutral a pulse with brief hold release and then hold is commanded Four arm escapement A four-arm version arranged as a <big> + </big> does not have the neutral catch remote from the magnet but rather a single catch location with catch points operating on alternate arm pairs depending upon the magnet state cutting back an appropriate arm will create the compound action described above Additional functions More complex systems have used additional pulse sequences to offer elevator kick up so that a loop may be performed after a spiral dive or up and down elevator control Such multi-stop systems also have employed electrical contacts to drive a second escapement to control a motor throttle Diagram of motion of a radio control model escapement own 2008-01-28 Leonard G Public Domain Servos radio control | ||||
