{
 "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": "rfb-x-114",
 "name": "RFB X-114 aerofoil boat (Lippisch, 1977)",
 "kind": "modern",
 "category": "Ground-effect craft",
 "group": "Lippisch reverse-delta craft",
 "year": null,
 "question": "What are the dimensions of the RFB X-114?",
 "tags": [
  "ekranoplan",
  "wing in ground effect",
  "wig craft",
  "ground effect vehicle",
  "lippisch reverse-delta craft"
 ],
 "aliases": [
  "x-114 dimensions",
  "rfb x-114 wingspan",
  "lippisch x-114",
  "x-114 aerofoil boat",
  "x-114 length",
  "rfb x-114 specs",
  "RFB X-114 Abmessungen",
  "x-114 medidas"
 ],
 "overall_mm": {
  "length": 12800,
  "width": 7000,
  "height": 2900
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 1,
 "url": "https://xemstudio.com/objects/rfb-x-114/",
 "sheet_txt": "https://xemstudio.com/objects/rfb-x-114/sheet.txt",
 "sheet": {
  "basis": "Secondary source: Wikipedia, 1000aircraftphotos.com (Friendship Bulletin 1977), The Maldives National Journal of Research (H. Hameed, 2019) (copy of the maker's figures; the maker publishes none directly)",
  "overall_mm": {
   "length": 12800,
   "width": 7000,
   "height": 2900
  },
  "notes": [
   "The X-114 was RFB's six-seat reverse-delta aerofoil boat, evaluated by the West German military; one was built.",
   "The file is a 12.80 × 7.00 × 2.90 m box (Wikipedia, Jane's). Another table gives an 8.77 m span, so span differs by source (the 7 m figure also appears in a 1977 RFB bulletin).",
   "Marked secondary.",
   "True size, no printing tolerance added. Only published numbers are used; anything not published is said so.",
   "Secondary source: the numbers come from a retailer or magazine copy of the maker's specification."
  ],
  "table": {
   "columns": [
    "dimension",
    "value"
   ],
   "rows": [
    [
     "Length",
     "12.80 m (42 ft 0 in)"
    ],
    [
     "Wingspan",
     "7.00 m (23 ft 0 in)"
    ],
    [
     "Height",
     "2.90 m (9 ft 6 in)"
    ],
    [
     "Alternative table (Hameed 2019, after Yun et al.)",
     "12.83 m × 8.77 m span × 2.92 m"
    ],
    [
     "Empty weight",
     "1,000 kg"
    ],
    [
     "Maximum take-off weight",
     "1,500 kg"
    ],
    [
     "Engine",
     "1 × Lycoming IO-360 flat-four, 150 kW (200 hp)"
    ],
    [
     "Propeller",
     "5-blade ducted pusher"
    ],
    [
     "Cruise speed in ground effect",
     "150 km/h"
    ],
    [
     "Range",
     "about 2,000 km in ground effect"
    ],
    [
     "Endurance",
     "20 h"
    ],
    [
     "Capacity",
     "1 crew + 5–6 passengers"
    ],
    [
     "First flight",
     "April 1977"
    ]
   ]
  }
 },
 "sheet_text": "RFB X-114 aerofoil boat (Lippisch, 1977) — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/rfb-x-114/  (sheet CC BY 4.0)\nBasis: Secondary source: Wikipedia, 1000aircraftphotos.com (Friendship Bulletin 1977), The Maldives National Journal of Research (H. Hameed, 2019) (copy of the maker's figures; the maker publishes none directly)\nCatalog version: 2026-10-20\n\nOverall (mm): length 12800, width 7000, height 2900\n- The X-114 was RFB's six-seat reverse-delta aerofoil boat, evaluated by the West German military; one was built.\n- The file is a 12.80 × 7.00 × 2.90 m box (Wikipedia, Jane's). Another table gives an 8.77 m span, so span differs by source (the 7 m figure also appears in a 1977 RFB bulletin).\n- Marked secondary.\n- True size, no printing tolerance added. Only published numbers are used; anything not published is said so.\n- Secondary source: the numbers come from a retailer or magazine copy of the maker's specification.\n\ndimension  value\nLength  12.80 m (42 ft 0 in)\nWingspan  7.00 m (23 ft 0 in)\nHeight  2.90 m (9 ft 6 in)\nAlternative table (Hameed 2019, after Yun et al.)  12.83 m × 8.77 m span × 2.92 m\nEmpty weight  1,000 kg\nMaximum take-off weight  1,500 kg\nEngine  1 × Lycoming IO-360 flat-four, 150 kW (200 hp)\nPropeller  5-blade ducted pusher\nCruise speed in ground effect  150 km/h\nRange  about 2,000 km in ground effect\nEndurance  20 h\nCapacity  1 crew + 5–6 passengers\nFirst flight  April 1977\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Wikipedia: RFB X-114 — web — Publisher's page; dimensions are facts — https://en.wikipedia.org/wiki/RFB_X-114\n- 1000aircraftphotos.com (Friendship Bulletin 1977): The Airfoilboat Story — web — Publisher's page; dimensions are facts — https://1000aircraftphotos.com/Contributions/Visschedijk/10307.htm\n- The Maldives National Journal of Research (H. Hameed, 2019): The design of a four-seat reverse delta WIG craft, Table 1 — web — Publisher's page; dimensions are facts — https://mnjr.mnu.edu.mv/journal/article/download/97/66\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/rfb-x-114/index.json\nAPI: https://xemstudio.com/api/geometry?object=rfb-x-114\n",
 "sources": [
  {
   "publisher": "Wikipedia",
   "title": "RFB X-114",
   "url": "https://en.wikipedia.org/wiki/RFB_X-114",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "1000aircraftphotos.com (Friendship Bulletin 1977)",
   "title": "The Airfoilboat Story",
   "url": "https://1000aircraftphotos.com/Contributions/Visschedijk/10307.htm",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "The Maldives National Journal of Research (H. Hameed, 2019)",
   "title": "The design of a four-seat reverse delta WIG craft, Table 1",
   "url": "https://mnjr.mnu.edu.mv/journal/article/download/97/66",
   "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": [
  "collins-x-112-aerofoil-boat",
  "rfb-x-113-am"
 ],
 "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": "What is the X-114's wingspan?",
   "a": "7.00 m per Wikipedia/Jane's and the RFB bulletin; one later table lists 8.77 m."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "rfb-x-114-envelope",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/rfb-x-114/rfb-x-114-envelope.step",
   "stl": "https://xemstudio.com/files/hardware/rfb-x-114/rfb-x-114-envelope.stl",
   "note": "Envelope 12800 × 7000 × 2900 mm (Real craft: overall length × wingspan × overall height as published)"
  }
 ],
 "markdown": "https://xemstudio.com/objects/rfb-x-114/index.md"
}