{
 "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": "ogive-delta-wing",
 "name": "Ogive (ogee) delta wing",
 "kind": "standard",
 "category": "Aircraft design",
 "group": "Wing planforms",
 "year": null,
 "question": "What is an ogive (ogee) delta wing like Concorde's?",
 "tags": [
  "vehicle design",
  "wing planforms",
  "rc design",
  "aerodynamics"
 ],
 "aliases": [
  "ogive wing",
  "ogee wing",
  "ogival delta",
  "concorde wing",
  "ogee delta rc",
  "concorde wing shape",
  "curved leading edge delta",
  "slender delta wing",
  "ogive delta planform"
 ],
 "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/ogive-delta-wing/",
 "sheet_txt": "https://xemstudio.com/objects/ogive-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": [
   "An ogee wing curves its leading edge from very high sweep at the root to lower sweep outboard. NASA's ogee test aircraft went from 52.5 deg to 77 deg root sweep and 55.8 deg minimum, cutting AR from 2.02 to 1.70 while adding area (NASA Ames).",
   "Its steady leading-edge vortices showed no detachment to 25 deg AoA and lowered approach speed by 10-15 kt, but pitch stability was neutral to slightly unstable on approach (NASA Ames). Concorde's slender ogival delta had no flaps or slats, only six elevons, and relies on vortex lift to fly slowly (Heritage Concorde).",
   "ONERA estimated about 30% lift increase near the ground for this planform (NASA Ames, ONERA comments).",
   "Used on: Concorde, Douglas F5D-1 (NASA ogee test).",
   "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": [
    [
     "Ogee LE sweep root / minimum",
     "77 deg / 55.8 deg",
     "NASA Ames"
    ],
    [
     "AR basic -> ogee",
     "2.02 -> 1.70",
     "NASA Ames"
    ],
    [
     "Wing area basic -> ogee",
     "557 -> 661 ft^2 (span 33.5 ft)",
     "NASA Ames"
    ],
    [
     "Vortex steady to",
     "25 deg AoA, 8 deg sideslip",
     "NASA Ames"
    ],
    [
     "Ground-effect lift increase (ONERA estimate)",
     "about 30%",
     "NASA Ames (ONERA)"
    ],
    [
     "Concorde control surfaces",
     "6 elevons, no flaps or slats",
     "Heritage Concorde"
    ],
    [
     "Reference build",
     "span 335, root 600, LE sweep 77 deg root",
     "computed (1:30 of 33.5 ft span)"
    ]
   ]
  }
 },
 "sheet_text": "Ogive (ogee) delta wing — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/ogive-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- An ogee wing curves its leading edge from very high sweep at the root to lower sweep outboard. NASA's ogee test aircraft went from 52.5 deg to 77 deg root sweep and 55.8 deg minimum, cutting AR from 2.02 to 1.70 while adding area (NASA Ames).\n- Its steady leading-edge vortices showed no detachment to 25 deg AoA and lowered approach speed by 10-15 kt, but pitch stability was neutral to slightly unstable on approach (NASA Ames). Concorde's slender ogival delta had no flaps or slats, only six elevons, and relies on vortex lift to fly slowly (Heritage Concorde).\n- ONERA estimated about 30% lift increase near the ground for this planform (NASA Ames, ONERA comments).\n- Used on: Concorde, Douglas F5D-1 (NASA ogee test).\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\nOgee LE sweep root / minimum  77 deg / 55.8 deg  NASA Ames\nAR basic -> ogee  2.02 -> 1.70  NASA Ames\nWing area basic -> ogee  557 -> 661 ft^2 (span 33.5 ft)  NASA Ames\nVortex steady to  25 deg AoA, 8 deg sideslip  NASA Ames\nGround-effect lift increase (ONERA estimate)  about 30%  NASA Ames (ONERA)\nConcorde control surfaces  6 elevons, no flaps or slats  Heritage Concorde\nReference build  span 335, root 600, LE sweep 77 deg root  computed (1:30 of 33.5 ft span)\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- NASA Ames (Drinkwater & Rolls), AGARD Report 538: Flight Experience with the Ogee Wing at Low Speed (1966) — web — Publisher's page; dimensions are facts — https://ntrs.nasa.gov/api/citations/19670020235/downloads/19670020235.pdf\n- Heritage Concorde: The Wing — web — Publisher's page; dimensions are facts — https://www.heritageconcorde.com/the-wing\n\nFree files (Xem Studio Design License, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/ogive-delta-wing/index.json\nAPI: https://xemstudio.com/api/geometry?object=ogive-delta-wing\n",
 "sources": [
  {
   "publisher": "NASA Ames (Drinkwater & Rolls), AGARD Report 538",
   "title": "Flight Experience with the Ogee Wing at Low Speed (1966)",
   "url": "https://ntrs.nasa.gov/api/citations/19670020235/downloads/19670020235.pdf",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Heritage Concorde",
   "title": "The Wing",
   "url": "https://www.heritageconcorde.com/the-wing",
   "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 does Concorde need no flaps?",
   "a": "Its slender ogival delta makes vortex lift at high AoA (Heritage Concorde)."
  }
 ],
 "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": "ogive-delta-wing-wing",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "Xem Studio Design License",
   "step": "https://xemstudio.com/files/hardware/ogive-delta-wing/ogive-delta-wing-wing.step",
   "stl": "https://xemstudio.com/files/hardware/ogive-delta-wing/ogive-delta-wing-wing.stl",
   "note": "delta planform: span 335, root 600, tip 0 mm, LE sweep 77°, dihedral 0°, NACA 0012"
  }
 ],
 "markdown": "https://xemstudio.com/objects/ogive-delta-wing/index.md"
}