{
 "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": "h-frame",
 "name": "H frame",
 "kind": "standard",
 "category": "Drone design",
 "group": "Drone frame layouts",
 "year": null,
 "question": "What is an H quad frame?",
 "tags": [
  "vehicle design",
  "drone frame layouts",
  "rc design",
  "aerodynamics"
 ],
 "aliases": [
  "h frame",
  "h quad",
  "hx frame",
  "h frame quadcopter",
  "fpv h frame",
  "h vs x frame",
  "racing h frame",
  "rigid quad frame"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 1,
 "url": "https://xemstudio.com/objects/h-frame/",
 "sheet_txt": "https://xemstudio.com/objects/h-frame/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": [
   "An H frame has parallel arms on a central pod; pilots find it the most rigid layout (IntoFPV), and it can keep props out of view with the camera forward (Oscar Liang).",
   "UAVModel lists it for racing and low profile, but heavier and less agile.",
   "The file is a reference example built by Xem Studio from the numbers above (Reference 5-inch build: 220 mm diagonal within Grepow's 210-250 mm class for 5 in props.). Sizes the sources do not fix are illustrative; scale the example to your own vehicle."
  ],
  "table": {
   "columns": [
    "parameter",
    "value or range",
    "source"
   ],
   "rows": [
    [
     "Layout",
     "arms parallel, centre pod",
     "UAVModel"
    ],
    [
     "5 in prop frame size",
     "210-250 mm diagonal (motor to motor)",
     "Grepow"
    ]
   ]
  }
 },
 "sheet_text": "H frame — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/h-frame/  (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- An H frame has parallel arms on a central pod; pilots find it the most rigid layout (IntoFPV), and it can keep props out of view with the camera forward (Oscar Liang).\n- UAVModel lists it for racing and low profile, but heavier and less agile.\n- The file is a reference example built by Xem Studio from the numbers above (Reference 5-inch build: 220 mm diagonal within Grepow's 210-250 mm class for 5 in props.). Sizes the sources do not fix are illustrative; scale the example to your own vehicle.\n\nparameter  value or range  source\nLayout  arms parallel, centre pod  UAVModel\n5 in prop frame size  210-250 mm diagonal (motor to motor)  Grepow\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- IntoFPV forum: Frame layouts, configurations and their characteristics — web — Publisher's page; dimensions are facts — https://intofpv.com/printthread.php?tid=15838\n- UAVModel blog: FPV Drone Frame Selection Guide: Geometry, Materials, and Arm Design — web — Publisher's page; dimensions are facts — https://blog.uavmodel.com/fpv-drone-frame-selection-guide/\n- Oscar Liang: Types of multicopter — web — Publisher's page; dimensions are facts — https://oscarliang.com/types-of-multicopter\n\nFree files (Xem Studio Design License, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/h-frame/index.json\nAPI: https://xemstudio.com/api/geometry?object=h-frame\n",
 "sources": [
  {
   "publisher": "IntoFPV forum",
   "title": "Frame layouts, configurations and their characteristics",
   "url": "https://intofpv.com/printthread.php?tid=15838",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "UAVModel blog",
   "title": "FPV Drone Frame Selection Guide: Geometry, Materials, and Arm Design",
   "url": "https://blog.uavmodel.com/fpv-drone-frame-selection-guide/",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Oscar Liang",
   "title": "Types of multicopter",
   "url": "https://oscarliang.com/types-of-multicopter",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "true-x-frame",
  "stretched-x-frame",
  "squashed-x-frame",
  "hybrid-x-frame",
  "deadcat-frame",
  "plus-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": "H or X?",
   "a": "Oscar Liang notes ongoing debate; IntoFPV pilots rate H most rigid."
  }
 ],
 "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": "h-frame-layout",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "Xem Studio Design License",
   "step": "https://xemstudio.com/files/hardware/h-frame/h-frame-layout.step",
   "stl": "https://xemstudio.com/files/hardware/h-frame/h-frame-layout.stl",
   "note": "h frame layout: 220 mm motor-to-motor diagonal, 5 in props (discs show the swept area; arms and plate illustrative)"
  }
 ],
 "markdown": "https://xemstudio.com/objects/h-frame/index.md"
}