[{"data":1,"prerenderedAt":154},["ShallowReactive",2],{"article-cessna172-throttle-quadrant":3},{"id":4,"title":5,"body":6,"description":143,"downloads":144,"extension":145,"lastUpdated":146,"meta":147,"navigation":148,"path":149,"readingTime":150,"seo":151,"stem":152,"__hash__":153},"projectArticles\u002Fprojects\u002Fcessna172\u002Fthrottle-quadrant.md","Throttle Quadrant",{"type":7,"value":8,"toc":134},"minimark",[9,14,18,41,44,48,51,54,65,69,117,120,124,127,131],[10,11,13],"h2",{"id":12},"overview","Overview",[15,16,17],"p",{},"The Cessna 172SP throttle quadrant consists of three push-pull controls mounted in the lower centre of the instrument panel:",[19,20,21,29,35],"ul",{},[22,23,24,28],"li",{},[25,26,27],"strong",{},"Throttle"," (black knob) — engine power",[22,30,31,34],{},[25,32,33],{},"Mixture"," (red knob) — fuel\u002Fair mixture",[22,36,37,40],{},[25,38,39],{},"Carb Heat"," (black knob with label) — carburettor heat",[15,42,43],{},"Unlike the 737 MAX throttle quadrant, there are no levers — the C172 uses friction-held push-pull cables with distinctive knob colours.",[10,45,47],{"id":46},"design","Design",[15,49,50],{},"The quadrant housing is laser-cut from 3mm MDF or aluminium sheet and mounts flush into the sub-panel. Each control uses a 10kΩ linear potentiometer (or Hall-effect sensor) attached to a sliding shaft inside a tube.",[15,52,53],{},"The knob caps are 3D-printed in PLA and painted\u002Ffinished to match the real aircraft:",[19,55,56,59,62],{},[22,57,58],{},"Throttle: black knurled knob",[22,60,61],{},"Mixture: red knurled knob",[22,63,64],{},"Carb Heat: black flat knob",[10,66,68],{"id":67},"axis-mapping","Axis Mapping",[70,71,72,85],"table",{},[73,74,75],"thead",{},[76,77,78,82],"tr",{},[79,80,81],"th",{},"Control",[79,83,84],{},"X-Plane Dataref",[86,87,88,99,108],"tbody",{},[76,89,90,93],{},[91,92,27],"td",{},[91,94,95],{},[96,97,98],"code",{},"sim\u002Fcockpit2\u002Fengine\u002Factuators\u002Fthrottle_ratio",[76,100,101,103],{},[91,102,33],{},[91,104,105],{},[96,106,107],{},"sim\u002Fcockpit2\u002Fengine\u002Factuators\u002Fmixture_ratio",[76,109,110,112],{},[91,111,39],{},[91,113,114],{},[96,115,116],{},"sim\u002Fcockpit2\u002Fengine\u002Factuators\u002Fcarb_heat_ratio",[15,118,119],{},"Each potentiometer connects to an analogue input on the ESP32. Values are read and sent to X-Plane via the CockpitConnect bridge.",[10,121,123],{"id":122},"friction-mechanism","Friction Mechanism",[15,125,126],{},"The real push-pull controls use cable friction. The replica uses an O-ring or felt pad friction fit on the sliding shaft to give a realistic resistance that holds position without snapping back.",[10,128,130],{"id":129},"status","Status",[15,132,133],{},"Planning — dimensional drawings in progress.",{"title":135,"searchDepth":136,"depth":136,"links":137},"",2,[138,139,140,141,142],{"id":12,"depth":136,"text":13},{"id":46,"depth":136,"text":47},{"id":67,"depth":136,"text":68},{"id":122,"depth":136,"text":123},{"id":129,"depth":136,"text":130},"Cessna 172SP throttle quadrant — throttle, mixture, and carb heat push-pull controls with Hall-effect axis sensing.",null,"md","2026-03",{},true,"\u002Fprojects\u002Fcessna172\u002Fthrottle-quadrant",4,{"title":5,"description":143},"projects\u002Fcessna172\u002Fthrottle-quadrant","sxvIiNFen6rnzt-4WbOY9RS3OV-Tvr10DGWfgNHBqDg",1781294861904]