{
 "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-113-am",
 "name": "RFB X-113 Am aerofoil boat (Lippisch, 1970)",
 "kind": "modern",
 "category": "Ground-effect craft",
 "group": "Lippisch reverse-delta craft",
 "year": null,
 "question": "What are the dimensions of the RFB X-113 Am?",
 "tags": [
  "ekranoplan",
  "wing in ground effect",
  "wig craft",
  "ground effect vehicle",
  "lippisch reverse-delta craft"
 ],
 "aliases": [
  "x-113 dimensions",
  "rfb x-113 am",
  "lippisch x-113 wingspan",
  "x-113 aerofoil boat",
  "rhein flugzeugbau x-113",
  "x-113 length",
  "RFB X-113 Abmessungen",
  "x-113 medidas"
 ],
 "overall_mm": {
  "length": 8430,
  "width": 5890,
  "height": 2070
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 1,
 "url": "https://xemstudio.com/objects/rfb-x-113-am/",
 "sheet_txt": "https://xemstudio.com/objects/rfb-x-113-am/sheet.txt",
 "sheet": {
  "basis": "Secondary source: Wikipedia (copy of the maker's figures; the maker publishes none directly)",
  "overall_mm": {
   "length": 8430,
   "width": 5890,
   "height": 2070
  },
  "notes": [
   "The X-113 Am was a single-seat composite reverse-delta craft built by Rhein-Flugzeugbau from the Collins X-112 concept.",
   "The file is an 8.43 × 5.89 × 2.07 m box (Jane's 1974–75 via Wikipedia). Hameed 2019 tabulates 2.0 m height and 360 kg MTOW.",
   "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",
     "8.43 m (27 ft 8 in)"
    ],
    [
     "Wingspan",
     "5.89 m (19 ft 4 in)"
    ],
    [
     "Height",
     "2.07 m (6 ft 9 in)"
    ],
    [
     "Empty weight",
     "255 kg"
    ],
    [
     "Gross weight",
     "345 kg"
    ],
    [
     "Engine",
     "Nelson H63-CP flat-four, 30 kW (40 hp) derated from 36 kW"
    ],
    [
     "Propeller",
     "2-blade wooden tractor, 1.17 m (3 ft 10 in) diameter"
    ],
    [
     "Cruise speed",
     "80 km/h"
    ],
    [
     "Take-off speed",
     "40 km/h"
    ],
    [
     "Efficient cruise height",
     "175 mm (7 in)"
    ],
    [
     "Ground-effect limit",
     "approx. 3 m (50% of span)"
    ],
    [
     "First flight",
     "October 1970"
    ]
   ]
  }
 },
 "sheet_text": "RFB X-113 Am aerofoil boat (Lippisch, 1970) — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/rfb-x-113-am/  (sheet CC BY 4.0)\nBasis: Secondary source: Wikipedia (copy of the maker's figures; the maker publishes none directly)\nCatalog version: 2026-10-20\n\nOverall (mm): length 8430, width 5890, height 2070\n- The X-113 Am was a single-seat composite reverse-delta craft built by Rhein-Flugzeugbau from the Collins X-112 concept.\n- The file is an 8.43 × 5.89 × 2.07 m box (Jane's 1974–75 via Wikipedia). Hameed 2019 tabulates 2.0 m height and 360 kg MTOW.\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  8.43 m (27 ft 8 in)\nWingspan  5.89 m (19 ft 4 in)\nHeight  2.07 m (6 ft 9 in)\nEmpty weight  255 kg\nGross weight  345 kg\nEngine  Nelson H63-CP flat-four, 30 kW (40 hp) derated from 36 kW\nPropeller  2-blade wooden tractor, 1.17 m (3 ft 10 in) diameter\nCruise speed  80 km/h\nTake-off speed  40 km/h\nEfficient cruise height  175 mm (7 in)\nGround-effect limit  approx. 3 m (50% of span)\nFirst flight  October 1970\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Wikipedia: RFB X-113 — web — Publisher's page; dimensions are facts — https://en.wikipedia.org/wiki/RFB_X-113\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/rfb-x-113-am/index.json\nAPI: https://xemstudio.com/api/geometry?object=rfb-x-113-am\n",
 "sources": [
  {
   "publisher": "Wikipedia",
   "title": "RFB X-113",
   "url": "https://en.wikipedia.org/wiki/RFB_X-113",
   "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-114"
 ],
 "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": "How low does the X-113 cruise?",
   "a": "Its efficient cruise height was 175 mm (7 in); ground effect fades at about 3 m, half the span."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "rfb-x-113-am-envelope",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/rfb-x-113-am/rfb-x-113-am-envelope.step",
   "stl": "https://xemstudio.com/files/hardware/rfb-x-113-am/rfb-x-113-am-envelope.stl",
   "note": "Envelope 8430 × 5890 × 2070 mm (Real craft: overall length × wingspan × overall height as published)"
  }
 ],
 "markdown": "https://xemstudio.com/objects/rfb-x-113-am/index.md"
}