[{"data":1,"prerenderedAt":210},["ShallowReactive",2],{"article-cessna172-kap140":3},{"id":4,"title":5,"body":6,"description":199,"downloads":200,"extension":201,"lastUpdated":202,"meta":203,"navigation":204,"path":205,"readingTime":206,"seo":207,"stem":208,"__hash__":209},"projectArticles\u002Fprojects\u002Fcessna172\u002Fkap140.md","KAP 140 Autopilot",{"type":7,"value":8,"toc":191},"minimark",[9,14,18,21,25,162,166,169,173,184,188],[10,11,13],"h2",{"id":12},"overview","Overview",[15,16,17],"p",{},"The Bendix\u002FKing KAP 140 is the two-axis autopilot fitted to the Six-Pack variant of the 172SP. It sits on the glareshield and provides autopilot engage, heading, navigation, approach, altitude hold, and vertical speed modes, plus an altitude alerter.",[15,19,20],{},"This page covers the physical build of the KAP 140 control panel — the bezel, button layout, encoder knobs, and integration with X-Plane.",[10,22,24],{"id":23},"panel-layout","Panel Layout",[26,27,28,44],"table",{},[29,30,31],"thead",{},[32,33,34,38,41],"tr",{},[35,36,37],"th",{},"Control",[35,39,40],{},"Type",[35,42,43],{},"Function",[45,46,47,59,69,79,89,99,109,119,130,141,152],"tbody",{},[32,48,49,53,56],{},[50,51,52],"td",{},"AP",[50,54,55],{},"Illuminated pushbutton",[50,57,58],{},"Autopilot engage\u002Fdisengage",[32,60,61,64,66],{},[50,62,63],{},"HDG",[50,65,55],{},[50,67,68],{},"Heading mode",[32,70,71,74,76],{},[50,72,73],{},"NAV",[50,75,55],{},[50,77,78],{},"NAV\u002FGPS track",[32,80,81,84,86],{},[50,82,83],{},"APR",[50,85,55],{},[50,87,88],{},"Approach mode",[32,90,91,94,96],{},[50,92,93],{},"REV",[50,95,55],{},[50,97,98],{},"Reverse\u002Fbackcourse mode",[32,100,101,104,106],{},[50,102,103],{},"ALT",[50,105,55],{},[50,107,108],{},"Altitude hold",[32,110,111,114,116],{},[50,112,113],{},"VS\u002FARM",[50,115,55],{},[50,117,118],{},"Vertical speed mode",[32,120,121,124,127],{},[50,122,123],{},"BARO",[50,125,126],{},"Pushbutton",[50,128,129],{},"Baro-corrected altitude alerter",[32,131,132,135,138],{},[50,133,134],{},"UP \u002F DN",[50,136,137],{},"Pushbuttons",[50,139,140],{},"Vertical speed pitch wheel",[32,142,143,146,149],{},[50,144,145],{},"HDG knob",[50,147,148],{},"Rotary encoder",[50,150,151],{},"Heading bug (shared with HI)",[32,153,154,157,159],{},[50,155,156],{},"ALT knob",[50,158,148],{},[50,160,161],{},"Altitude alerter \u002F VS target",[10,163,165],{"id":164},"construction","Construction",[15,167,168],{},"The bezel is 3D-printed in PLA and painted to match the glareshield. Illuminated pushbuttons use 12mm momentary switches with integrated LEDs, driven by ESP32 digital outputs. The encoder knobs are 3D-printed caps over 24-pulse rotary encoders.",[10,170,172],{"id":171},"x-plane-integration","X-Plane Integration",[174,175,181],"pre",{"className":176,"code":178,"language":179,"meta":180},[177],"language-text","# Datarefs (shared autopilot)\nsim\u002Fcockpit2\u002Fautopilot\u002Fautopilot_state\nsim\u002Fcockpit2\u002Fautopilot\u002Fheading_status\nsim\u002Fcockpit2\u002Fautopilot\u002Faltitude_hold_status\nsim\u002Fcockpit2\u002Fautopilot\u002Fvertical_mode\nsim\u002Fcockpit2\u002Fautopilot\u002Fheading_dial_deg_mag_pilot\nsim\u002Fcockpit2\u002Fautopilot\u002Faltitude_dial_ft\n\n# Commands\nsim\u002Fautopilot\u002Fservos_on\nsim\u002Fautopilot\u002Fheading\nsim\u002Fautopilot\u002FNAV\nsim\u002Fautopilot\u002Fapproach\nsim\u002Fautopilot\u002Faltitude_hold\nsim\u002Fautopilot\u002Fvertical_speed\nsim\u002Fautopilot\u002Fheading_up\nsim\u002Fautopilot\u002Fheading_down\nsim\u002Fautopilot\u002Faltitude_up\nsim\u002Fautopilot\u002Faltitude_down\n","text","",[182,183,178],"code",{"__ignoreMap":180},[10,185,187],{"id":186},"status","Status",[15,189,190],{},"Planning — bezel design not yet started.",{"title":180,"searchDepth":192,"depth":192,"links":193},2,[194,195,196,197,198],{"id":12,"depth":192,"text":13},{"id":23,"depth":192,"text":24},{"id":164,"depth":192,"text":165},{"id":171,"depth":192,"text":172},{"id":186,"depth":192,"text":187},"Physical Bendix\u002FKing KAP 140 autopilot control unit for the Six-Pack glareshield — 3D-printed bezel, illuminated buttons, encoder knobs, and X-Plane mapping.",null,"md","2026-06",{},true,"\u002Fprojects\u002Fcessna172\u002Fkap140",5,{"title":5,"description":199},"projects\u002Fcessna172\u002Fkap140","dDoCqEmPu3sTaZ0NNjqCxNLOVPZSYzjcpe-q6cvoly4",1781294861651]