{
 "version": "2026-10-20",
 "license": "Dimension sheets: CC BY 4.0. Standard and published-size files: CC BY 4.0. Xem Studio's own designs (files_license = Xem Studio Design License): free to use and sell things from, not to redistribute as files — https://xemstudio.com/license/. Other publishers' files: their own license, linked beside them.",
 "slug": "coupled-aileron-rudder",
 "name": "Coupled ailerons and rudder",
 "kind": "standard",
 "category": "Aircraft design",
 "group": "Control surfaces",
 "year": null,
 "question": "What are coupled ailerons and rudder?",
 "tags": [
  "vehicle design",
  "control surfaces",
  "rc design",
  "aerodynamics",
  "guide"
 ],
 "aliases": [
  "coupled ailerons and rudder",
  "aileron rudder interconnect",
  "aileron to rudder mix",
  "rudder coupling",
  "adverse yaw rudder",
  "coordinated turn mix",
  "ari system",
  "aileron rudder spring"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "not-scanned",
 "les": false,
 "free_files": 0,
 "url": "https://xemstudio.com/objects/coupled-aileron-rudder/",
 "sheet_txt": "https://xemstudio.com/objects/coupled-aileron-rudder/sheet.txt",
 "sheet": {
  "basis": "Design rules and figures from the cited sources; example geometry by Xem Studio",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "Coupled controls link the rudder to the ailerons with interconnect springs, so aileron input also deflects the rudder to counter adverse yaw; the pilot can override the springs to slip (FAA PHAK ch.6).",
   "The rudder requirement is greatest at low airspeed, high AoA and large aileron deflection (FAA), which is why RC 'aileron-to-rudder mix' is popular on slow models."
  ],
  "table": {
   "columns": [
    "parameter",
    "value or range",
    "source"
   ],
   "rows": [
    [
     "Rudder demand peak",
     "low speed, high AoA, large aileron",
     "FAA PHAK ch.6"
    ]
   ]
  }
 },
 "sheet_text": "Coupled ailerons and rudder — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/coupled-aileron-rudder/  (sheet CC BY 4.0)\nBasis: Design rules and figures from the cited sources; example geometry by Xem Studio\nCatalog version: 2026-10-20\n\nSizes: see table below\n- Coupled controls link the rudder to the ailerons with interconnect springs, so aileron input also deflects the rudder to counter adverse yaw; the pilot can override the springs to slip (FAA PHAK ch.6).\n- The rudder requirement is greatest at low airspeed, high AoA and large aileron deflection (FAA), which is why RC 'aileron-to-rudder mix' is popular on slow models.\n\nparameter  value or range  source\nRudder demand peak  low speed, high AoA, large aileron  FAA PHAK ch.6\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- FAA: Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25), Ch. 6 Flight Controls — web — Publisher's page; dimensions are facts — https://www.faa.gov/sites/faa.gov/files/08_phak_ch6.pdf\n\nNo true-size file yet: the published figures do not fix the whole shape; a measured scan is planned.\nAPI: https://xemstudio.com/api/geometry?object=coupled-aileron-rudder\n",
 "sources": [
  {
   "publisher": "FAA",
   "title": "Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25), Ch. 6 Flight Controls",
   "url": "https://www.faa.gov/sites/faa.gov/files/08_phak_ch6.pdf",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  }
 ],
 "xem": {
  "status": "not-scanned",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "aileron",
  "frise-aileron",
  "differential-ailerons",
  "elevon",
  "flaperon",
  "spoiler"
 ],
 "fits": [],
 "dimensions": "exact (nominal, no printing tolerance)",
 "dimension_rule": "All geometry on Xem Studio is exact (nominal, true size) with no printing tolerance. Where a part meets another part, the object lists its mating features (feature, exact size, what it mates with, fit class: press, slide, run, socket, clamp or designed). Apply your process's allowance to those features only; 'designed' gaps are part of the design and stay as drawn.",
 "mating": [],
 "faq": [
  {
   "q": "Should I mix rudder with ailerons?",
   "a": "It counters adverse yaw, which is worst slow and at high AoA (FAA PHAK ch.6)."
  }
 ],
 "files_license": null,
 "offers": [],
 "markdown": "https://xemstudio.com/objects/coupled-aileron-rudder/index.md"
}