{
 "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": "cranked-double-delta-wing",
 "name": "Cranked arrow / double delta wing",
 "kind": "standard",
 "category": "Aircraft design",
 "group": "Wing planforms",
 "year": null,
 "question": "What is a cranked-arrow or double-delta wing?",
 "tags": [
  "vehicle design",
  "wing planforms",
  "rc design",
  "aerodynamics"
 ],
 "aliases": [
  "cranked arrow wing",
  "double delta wing",
  "cranked delta",
  "f-16xl wing",
  "compound delta",
  "double delta rc",
  "saab draken wing",
  "kinked delta wing",
  "two sweep angle wing"
 ],
 "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/cranked-double-delta-wing/",
 "sheet_txt": "https://xemstudio.com/objects/cranked-double-delta-wing/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": [
   "A cranked (double-delta) wing uses a highly swept inboard leading edge and a less swept outboard panel. The F-16XL's LE sweep is 70 deg inboard and 50 deg outboard of the crank (NASA CAWAPI).",
   "It was designed to give the F-16 better supersonic performance while keeping transonic performance comparable, and its configuration resembled NASA's HSCT concept (NASA).",
   "An S-blend at the wing-fuselage leading edge was added to cure a high-AoA pitch instability seen in wind tunnels (NASA).",
   "Used on: F-16XL.",
   "The file is a reference example built by Xem Studio from the numbers above. Sizes the sources do not fix are illustrative; scale the example to your own vehicle."
  ],
  "table": {
   "columns": [
    "parameter",
    "value or range",
    "source"
   ],
   "rows": [
    [
     "F-16XL LE sweep inboard / outboard",
     "70 deg / 50 deg",
     "NASA (Obara & Lamar)"
    ],
    [
     "F-16XL wing area / span",
     "646.37 ft^2 / 32.4 ft",
     "NASA"
    ],
    [
     "Reference AR",
     "1.75",
     "NASA"
    ],
    [
     "Reference build",
     "span 600, root 700, sweep 70 deg inboard (cranked)",
     "computed"
    ]
   ]
  }
 },
 "sheet_text": "Cranked arrow / double delta wing — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/cranked-double-delta-wing/  (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- A cranked (double-delta) wing uses a highly swept inboard leading edge and a less swept outboard panel. The F-16XL's LE sweep is 70 deg inboard and 50 deg outboard of the crank (NASA CAWAPI).\n- It was designed to give the F-16 better supersonic performance while keeping transonic performance comparable, and its configuration resembled NASA's HSCT concept (NASA).\n- An S-blend at the wing-fuselage leading edge was added to cure a high-AoA pitch instability seen in wind tunnels (NASA).\n- Used on: F-16XL.\n- The file is a reference example built by Xem Studio from the numbers above. Sizes the sources do not fix are illustrative; scale the example to your own vehicle.\n\nparameter  value or range  source\nF-16XL LE sweep inboard / outboard  70 deg / 50 deg  NASA (Obara & Lamar)\nF-16XL wing area / span  646.37 ft^2 / 32.4 ft  NASA\nReference AR  1.75  NASA\nReference build  span 600, root 700, sweep 70 deg inboard (cranked)  computed\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- NASA Langley (Obara & Lamar): Overview of the Cranked-Arrow Wing Aerodynamics Project International — web — Publisher's page; dimensions are facts — https://ntrs.nasa.gov/api/citations/20090017796/downloads/20090017796.pdf\n\nFree files (Xem Studio Design License, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/cranked-double-delta-wing/index.json\nAPI: https://xemstudio.com/api/geometry?object=cranked-double-delta-wing\n",
 "sources": [
  {
   "publisher": "NASA Langley (Obara & Lamar)",
   "title": "Overview of the Cranked-Arrow Wing Aerodynamics Project International",
   "url": "https://ntrs.nasa.gov/api/citations/20090017796/downloads/20090017796.pdf",
   "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": [
  "rectangular-wing",
  "tapered-wing",
  "elliptical-wing",
  "swept-wing",
  "forward-swept-wing",
  "delta-wing"
 ],
 "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 two sweep angles?",
   "a": "The steep inner sweep suits supersonic flight; the shallower outer panel helps at lower speed (NASA CAWAPI)."
  }
 ],
 "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": "cranked-double-delta-wing-wing",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "Xem Studio Design License",
   "step": "https://xemstudio.com/files/hardware/cranked-double-delta-wing/cranked-double-delta-wing-wing.step",
   "stl": "https://xemstudio.com/files/hardware/cranked-double-delta-wing/cranked-double-delta-wing-wing.stl",
   "note": "cranked planform: span 600, root 700, tip 60 mm, LE sweep 70°, dihedral 0°, NACA 0012"
  }
 ],
 "markdown": "https://xemstudio.com/objects/cranked-double-delta-wing/index.md"
}