{
 "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": "motor-kv-matching",
 "name": "Motor KV and prop/voltage matching",
 "kind": "standard",
 "category": "Drone design",
 "group": "Drone frame layouts",
 "year": null,
 "question": "What KV motor for 4S or 6S on a 5 inch drone?",
 "tags": [
  "vehicle design",
  "drone frame layouts",
  "rc design",
  "aerodynamics"
 ],
 "aliases": [
  "motor kv",
  "kv rating",
  "kv for 6s",
  "kv vs voltage",
  "best kv 5 inch",
  "what kv motor",
  "kv explained",
  "low kv high kv",
  "kv rpm per volt"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
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 "url": "https://xemstudio.com/objects/motor-kv-matching/",
 "sheet_txt": "https://xemstudio.com/objects/motor-kv-matching/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": [
   "KV is rpm per volt unloaded; 2300 KV on 16.8 V gives 38,640 rpm (GetFPV). Higher voltage needs lower KV and bigger props need lower KV (Unmanned Tech Shop).",
   "Oscar Liang's table: 5 in freestyle 2300-2700 KV on 4S, 1700-2100 KV on 6S; 7 in 1200-1400 KV on 6S. Low-KV motors on fewer cells with big props are most efficient (ArduPilot).",
   "The file is a reference example built by Xem Studio from the numbers above (5x4.3 tri-blade named in Unmanned Tech Shop guide.). Sizes the sources do not fix are illustrative; scale the example to your own vehicle."
  ],
  "table": {
   "columns": [
    "parameter",
    "value or range",
    "source"
   ],
   "rows": [
    [
     "5 in freestyle 4S",
     "2300-2700 KV",
     "Oscar Liang table"
    ],
    [
     "5 in freestyle 6S",
     "1700-2100 KV",
     "Oscar Liang table"
    ],
    [
     "5 in racing 6S",
     "1900-2300 KV",
     "Oscar Liang table"
    ],
    [
     "7 in 6S",
     "1200-1400 KV",
     "Oscar Liang table"
    ],
    [
     "3 in 4S",
     "3000-4200 KV",
     "Oscar Liang table"
    ],
    [
     "Battery rule",
     "about half dry weight",
     "Oscar Liang"
    ],
    [
     "Hover throttle target",
     "~50%",
     "ArduPilot"
    ]
   ]
  }
 },
 "sheet_text": "Motor KV and prop/voltage matching — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/motor-kv-matching/  (sheet CC BY 4.0; files Xem Studio Design License, https://xemstudio.com/license/)\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- KV is rpm per volt unloaded; 2300 KV on 16.8 V gives 38,640 rpm (GetFPV). Higher voltage needs lower KV and bigger props need lower KV (Unmanned Tech Shop).\n- Oscar Liang's table: 5 in freestyle 2300-2700 KV on 4S, 1700-2100 KV on 6S; 7 in 1200-1400 KV on 6S. Low-KV motors on fewer cells with big props are most efficient (ArduPilot).\n- The file is a reference example built by Xem Studio from the numbers above (5x4.3 tri-blade named in Unmanned Tech Shop guide.). Sizes the sources do not fix are illustrative; scale the example to your own vehicle.\n\nparameter  value or range  source\n5 in freestyle 4S  2300-2700 KV  Oscar Liang table\n5 in freestyle 6S  1700-2100 KV  Oscar Liang table\n5 in racing 6S  1900-2300 KV  Oscar Liang table\n7 in 6S  1200-1400 KV  Oscar Liang table\n3 in 4S  3000-4200 KV  Oscar Liang table\nBattery rule  about half dry weight  Oscar Liang\nHover throttle target  ~50%  ArduPilot\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- GetFPV: What is a drone motor? — web — Publisher's page; dimensions are facts — https://www.getfpv.com/motors/what-is-a-drone-motor.html\n- Oscar Liang: Prop, motor, LiPo and weight table — web — Publisher's page; dimensions are facts — https://oscarliang.com/table-prop-motor-lipo-weight/\n- Unmanned Tech Shop: Motor selection guide for FPV drones by class and frame size — web — Publisher's page; dimensions are facts — https://www.unmannedtechshop.co.uk/de/blogs/knowledge-base/motor-selection-guide-fpv-drones-by-class-frame-size\n- ArduPilot: Archived: Advanced MultiCopter Design — web — Publisher's page; dimensions are facts — https://ardupilot.org/copter/docs/advanced-multicopter-design.html\n- Unmanned Tech Shop: FPV drone propeller size guide: how to choose props — web — Publisher's page; dimensions are facts — https://www.unmannedtechshop.co.uk/de/blogs/knowledge-base/fpv-drone-propeller-size-guide-how-to-choose\n\nFree files (Xem Studio Design License, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/motor-kv-matching/index.json\nAPI: https://xemstudio.com/api/geometry?object=motor-kv-matching\n",
 "sources": [
  {
   "publisher": "GetFPV",
   "title": "What is a drone motor?",
   "url": "https://www.getfpv.com/motors/what-is-a-drone-motor.html",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Oscar Liang",
   "title": "Prop, motor, LiPo and weight table",
   "url": "https://oscarliang.com/table-prop-motor-lipo-weight/",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Unmanned Tech Shop",
   "title": "Motor selection guide for FPV drones by class and frame size",
   "url": "https://www.unmannedtechshop.co.uk/de/blogs/knowledge-base/motor-selection-guide-fpv-drones-by-class-frame-size",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "ArduPilot",
   "title": "Archived: Advanced MultiCopter Design",
   "url": "https://ardupilot.org/copter/docs/advanced-multicopter-design.html",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Unmanned Tech Shop",
   "title": "FPV drone propeller size guide: how to choose props",
   "url": "https://www.unmannedtechshop.co.uk/de/blogs/knowledge-base/fpv-drone-propeller-size-guide-how-to-choose",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  }
 ],
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 "related": [
  "true-x-frame",
  "stretched-x-frame",
  "squashed-x-frame",
  "hybrid-x-frame",
  "deadcat-frame",
  "h-frame"
 ],
 "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": "Why lower KV on 6S?",
   "a": "Higher voltage raises rpm, so KV comes down (Unmanned Tech Shop)."
  }
 ],
 "files_license": {
  "name": "Xem Studio Design License",
  "holder": "Xem Studio",
  "url": "https://xemstudio.com/license/",
  "note": "Xem Studio's own design: free to use, print, modify and sell things made from it; not to be republished or redistributed as files."
 },
 "offers": [
  {
   "file": "motor-kv-matching-propeller",
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   "license": "Xem Studio Design License",
   "step": "https://xemstudio.com/files/hardware/motor-kv-matching/motor-kv-matching-propeller.step",
   "stl": "https://xemstudio.com/files/hardware/motor-kv-matching/motor-kv-matching-propeller.stl",
   "note": "5×4.3 in propeller, 3 blades: each section set at the geometric pitch angle atan(P / 2πr); chord and section illustrative"
  }
 ],
 "markdown": "https://xemstudio.com/objects/motor-kv-matching/index.md"
}