{
  "id": "blue-origin-be-4",
  "title": "BE-4 engine",
  "maker": "Blue Origin",
  "maker_type": "Commercial",
  "kind": "mission",
  "category": "engines",
  "page": "https://spacemushroom.com/space-products/blue-origin-be-4/",
  "website": "https://www.satellitetoday.com/finance/2015/09/30/blue-origins-be-4-engine-passes-100-staged-combustion-tests/",
  "summary": "Blue Origin’s LOX/liquefied natural gas staged-combustion engine for Vulcan and New Glenn; the only alloys Blue Origin has stated are the aluminum housing and Monel turbine of its oxidizer boost pump.",
  "application": "BE-4 engines power ULA’s Vulcan Centaur (two engines) and Blue Origin’s New Glenn (seven engines). It is the first large US engine to burn liquefied natural gas on an oxygen-rich staged-combustion cycle.",
  "story": {
    "headline": "BE-4 is a Blue Origin engine that burns liquefied natural gas, and it flies on Vulcan Centaur and New Glenn.",
    "intro": [
      "Blue Origin's BE-4 burns liquid oxygen and liquefied natural gas. Two engines power United Launch Alliance's Vulcan Centaur and seven power Blue Origin's New Glenn. In 2015 Blue Origin gave the sea-level thrust as 550,000 pounds-force, and in November 2025 it announced that maximum thrust had risen to 2,847 kilonewtons (640,000 pounds-force).",
      "The BE-4 uses oxygen-rich staged combustion. A single preburner makes hot, oxygen-rich gas that spins one turbine, and that turbine drives both the fuel and oxygen pumps. The gas then goes on to mix with fuel in the main chamber. Parts of the oxygen boost pump are 3D printed."
    ],
    "built": [
      {
        "title": "Oxygen boost pump",
        "text": "The oxygen boost pump feeds the main oxygen pump, and many of its components are 3D printed. In a 2017 email, Blue Origin's founder said the housing is one printed aluminium part and the turbine stages are printed from Monel, a nickel alloy. The turbine nozzle and rotors are printed too and need little machining.",
        "parts": [
          "Oxidizer boost pump (OBP)",
          "Pump housing",
          "Hydraulic turbine stages",
          "Turbine nozzle and rotors"
        ]
      },
      {
        "title": "Chamber and injector",
        "text": "The main chamber is cooled by propellant flowing through its walls, and the main injector mixes the preburner's exhaust gas with fuel. Each engine has a single combustion chamber and nozzle, unlike the Russian RD-180's twin chambers. Parts of the chamber and nozzle are 3D printed.",
        "parts": [
          "Main injector assembly",
          "Regeneratively cooled thrust chamber with multiple full-scale injector elements",
          "Single combustion chamber and nozzle",
          "Thrust chamber and nozzle"
        ]
      },
      {
        "title": "Pumps and tank pressure",
        "text": "The main turbopump rides on hydrostatic bearings rather than ball or roller bearings. Main valves control the flow of propellant to the preburner and the chamber. Burning liquefied natural gas also lets the tanks be pressurised with the propellant's own gas, so no helium pressurisation hardware is needed.",
        "parts": [
          "Main turbopump (one turbine driving the fuel and oxygen pumps)",
          "Autogenous tank pressurisation from LNG",
          "Main valves"
        ]
      },
      {
        "title": "Making and testing",
        "text": "Blue Origin tests engine components in Kent, Washington, and in Texas. A dedicated liquefied natural gas test site near Van Horn, Texas, opened in May 2014 and can test thrust above one million pounds-force. In June 2017 the company announced a new factory in Huntsville, Alabama, to build the BE-4.",
        "parts": [
          "Component test facilities, Kent, Washington",
          "LNG test facility near Van Horn, Texas",
          "Engine factory, Huntsville, Alabama"
        ]
      }
    ],
    "materials": [
      {
        "name": "Aluminium",
        "mid": "aluminium",
        "where": "The housing of the oxygen boost pump, printed as a single part. Blue Origin does not name the alloy."
      },
      {
        "name": "Monel",
        "mid": "monel",
        "where": "The stages of the boost pump's hydraulic turbine, 3D printed from this nickel alloy."
      }
    ],
    "connections": "Two BE-4 engines power the first stage of United Launch Alliance's Vulcan Centaur, and seven power Blue Origin's New Glenn, with nine planned for a larger version. ULA chose the engine in September 2018, after an initial agreement in September 2014. The BE-4 is meant to end ULA's reliance on the Russian-built RD-180. It builds on the flight heritage of Blue Origin's hydrogen engine, the BE-3, and Blue Origin makes it itself.",
    "unknown": "Blue Origin has not published a materials list for the main chamber, injector or turbopumps. The only metals it has named belong to the oxygen boost pump, in a 2017 email. It names no supplier for any part. Many early descriptions cover test engines, not the one that flies.",
    "facts": [
      {
        "label": "Sea-level thrust (2015)",
        "value": "550,000 lbf"
      },
      {
        "label": "Propellants",
        "value": "Liquid oxygen and liquefied natural gas"
      },
      {
        "label": "Power cycle",
        "value": "oxygen-rich staged combustion"
      },
      {
        "label": "Deep throttling demonstrated",
        "value": "to at least 40 percent power"
      },
      {
        "label": "First flight",
        "value": "8 January 2024, Vulcan Centaur"
      },
      {
        "label": "Development start",
        "value": "2011"
      }
    ]
  },
  "specifications": [
    {
      "label": "Sea-level thrust (2015)",
      "value": "550,000 lbf",
      "source_url": "https://www.satellitetoday.com/finance/2015/09/30/blue-origins-be-4-engine-passes-100-staged-combustion-tests/",
      "quote": "delivers 550,000-lbf of thrust at sea level"
    },
    {
      "label": "Propellants",
      "value": "Liquid oxygen and liquefied natural gas",
      "source_url": "https://www.satellitetoday.com/finance/2015/09/30/blue-origins-be-4-engine-passes-100-staged-combustion-tests/",
      "quote": "is a liquid oxygen, Liquefied Natural Gas (LNG) rocket engine"
    },
    {
      "label": "Development start",
      "value": "2011",
      "source_url": "https://www.satellitetoday.com/finance/2015/09/30/blue-origins-be-4-engine-passes-100-staged-combustion-tests/",
      "quote": "Blue Origin began development of the BE-4 in 2011."
    },
    {
      "label": "Sea-level thrust per engine (Vulcan guide)",
      "value": "2446.5 kN (550k lbf)",
      "source_url": "https://www.ulalaunch.com/docs/default-source/rockets/2023_vulcan_user_guide.pdf",
      "quote": "each delivering 2446.5-kN (550k-lbf) sea level thrust"
    },
    {
      "label": "Propellants on Vulcan",
      "value": "liquid oxygen and liquefied natural gas",
      "source_url": "https://www.ulalaunch.com/docs/default-source/rockets/2023_vulcan_user_guide.pdf",
      "quote": "aluminum orthogrid tanks that hold over a million pounds of liquid oxygen and liquid natural gas"
    },
    {
      "label": "Power cycle",
      "value": "oxygen-rich staged combustion",
      "source_url": "https://www.ulalaunch.com/docs/default-source/news-items/be-4_fact_sheet_web_final_2.pdf",
      "quote": "Oxygen-Rich Staged Combustion (ORSC)"
    },
    {
      "label": "Deep throttling demonstrated",
      "value": "to at least 40 percent power",
      "source_url": "https://en.wikipedia.org/wiki/BE-4",
      "quote": "Tested deep throttling capability to at least 40% power"
    },
    {
      "label": "First flight",
      "value": "8 January 2024, Vulcan Centaur",
      "source_url": "https://en.wikipedia.org/wiki/BE-4",
      "quote": "The BE-4 made its first flight aboard the Vulcan Centaur rocket on January 8, 2024."
    },
    {
      "label": "First hot fire of the full engine",
      "value": "October 2017, at 50 percent thrust for 3 seconds",
      "source_url": "https://en.wikipedia.org/wiki/BE-4",
      "quote": "BE-4 was first test-fired, at 50% thrust for 3 seconds, in October 2017,"
    },
    {
      "label": "Full-thrust testing",
      "value": "100 percent by August 2019",
      "source_url": "https://en.wikipedia.org/wiki/BE-4",
      "quote": "and by August 2019 to 100%."
    },
    {
      "label": "Thrust increase announced November 2025",
      "value": "2,847 kN (640,000 lbf) maximum thrust",
      "source_url": "https://en.wikipedia.org/wiki/BE-4",
      "quote": "stating the maximum thrust had increased to 2,847 kN (640,000 lbf)."
    },
    {
      "label": "Staged-combustion tests by September 2015",
      "value": "more than 100",
      "source_url": "https://www.satellitetoday.com/finance/2015/09/30/blue-origins-be-4-engine-passes-100-staged-combustion-tests/",
      "quote": "Blue Origin has completed more than 100 staged-combustion tests for the BE-4 engine"
    }
  ],
  "features": [
    {
      "text": "Oxidizer boost pump parts made by 3D printing",
      "source_url": "https://3dprint.com/163811/additive-manufacturing-blue-origin/",
      "quote": "Our Ox Boost Pump (OBP) design leverages 3-D additive manufacturing to make many of the key components."
    },
    {
      "text": "Thrust chamber and nozzle manufacturing used additive manufacturing",
      "source_url": "https://www.satellitetoday.com/finance/2015/09/30/blue-origins-be-4-engine-passes-100-staged-combustion-tests/",
      "quote": "including the use of additive manufacturing"
    }
  ],
  "parts": [
    {
      "assembly": "Oxidizer boost pump",
      "parts": [
        {
          "part": "Pump housing",
          "material": "aluminum (alloy not stated)",
          "form": "single 3D-printed part",
          "finish": null,
          "standard": null,
          "hardware_ref": null,
          "quote": "The housing is a single printed aluminum part",
          "source_url": "https://3dprint.com/163811/additive-manufacturing-blue-origin/",
          "profile": "aluminium",
          "mid": "aluminium"
        },
        {
          "part": "Hydraulic turbine stages",
          "material": "Monel (nickel alloy)",
          "form": "3D-printed",
          "finish": null,
          "standard": null,
          "hardware_ref": null,
          "quote": "all of the stages of the hydraulic turbine are printed from Monel, a nickel alloy",
          "source_url": "https://3dprint.com/163811/additive-manufacturing-blue-origin/",
          "profile": null,
          "mid": "monel"
        },
        {
          "part": "Turbine nozzle and rotors",
          "material": null,
          "form": "3D-printed",
          "finish": null,
          "standard": null,
          "hardware_ref": null,
          "quote": "The turbine nozzle and rotors are also 3-D printed and require minimum machining to achieve the required fits.",
          "source_url": "https://3dprint.com/163811/additive-manufacturing-blue-origin/",
          "profile": null,
          "mid": null
        }
      ]
    },
    {
      "assembly": "Thrust chamber and nozzle",
      "parts": [
        {
          "part": "Thrust chamber and nozzle",
          "material": null,
          "form": "additively manufactured in part",
          "finish": null,
          "standard": null,
          "hardware_ref": null,
          "quote": "including the use of additive manufacturing",
          "source_url": "https://www.satellitetoday.com/finance/2015/09/30/blue-origins-be-4-engine-passes-100-staged-combustion-tests/",
          "profile": null,
          "mid": null
        }
      ]
    },
    {
      "assembly": "Power cycle",
      "parts": [
        {
          "part": "Oxygen-rich preburner",
          "material": null,
          "form": null,
          "finish": null,
          "standard": null,
          "hardware_ref": null,
          "quote": "subscale oxygen-rich preburner development",
          "source_url": "https://www.ulalaunch.com/docs/default-source/news-items/be-4_fact_sheet_web_final_2.pdf",
          "profile": null,
          "mid": null,
          "function": "burns the oxidiser-rich flow that drives the turbine in the oxygen-rich staged-combustion cycle",
          "specs": [
            {
              "label": "Cycle",
              "value": "Oxygen-Rich Staged Combustion (ORSC)",
              "quote": "Oxygen-Rich Staged Combustion (ORSC)",
              "source_url": "https://www.ulalaunch.com/docs/default-source/news-items/be-4_fact_sheet_web_final_2.pdf"
            },
            {
              "label": "Layout",
              "value": "single preburner, single turbine for both pumps",
              "quote": "with a single oxygen-rich preburner, and a single turbine driving both the fuel and oxygen pumps.",
              "source_url": "https://en.wikipedia.org/wiki/BE-4"
            }
          ]
        },
        {
          "part": "Main turbopump (one turbine driving the fuel and oxygen pumps)",
          "material": null,
          "form": null,
          "finish": null,
          "standard": null,
          "hardware_ref": null,
          "quote": "a single turbine driving both the fuel and oxygen pumps",
          "source_url": "https://en.wikipedia.org/wiki/BE-4",
          "profile": null,
          "mid": null,
          "function": "feeds the preburner and main chamber",
          "specs": [
            {
              "label": "Bearings",
              "value": "hydrostatic bearings instead of ball or roller bearings",
              "quote": "Hydrostatic bearings are used in the turbopumps rather than the more typical ball and roller bearings",
              "source_url": "https://en.wikipedia.org/wiki/BE-4"
            }
          ]
        },
        {
          "part": "Oxidizer boost pump (OBP)",
          "material": null,
          "form": null,
          "finish": null,
          "standard": null,
          "hardware_ref": "Supplier: Blue Origin",
          "quote": "Our Ox Boost Pump (OBP) design leverages 3-D additive manufacturing to make many of the key components.",
          "source_url": "https://3dprint.com/163811/additive-manufacturing-blue-origin/",
          "profile": null,
          "mid": null,
          "function": "assembly that feeds the main oxygen pump; its key components are 3-D printed"
        },
        {
          "part": "LOx impeller and turbine",
          "material": null,
          "form": null,
          "finish": null,
          "standard": null,
          "hardware_ref": null,
          "quote": "BE-4 LOx impeller and turbine",
          "source_url": "https://www.ulalaunch.com/docs/default-source/news-items/be-4_fact_sheet_web_final_2.pdf",
          "profile": null,
          "mid": null,
          "function": "oxygen-side pump wheel and drive turbine, shown in test photos"
        },
        {
          "part": "Main valves",
          "material": null,
          "form": null,
          "finish": null,
          "standard": null,
          "hardware_ref": null,
          "quote": "testing of the turbopumps and main valves",
          "source_url": "https://www.ulalaunch.com/docs/default-source/news-items/be-4_fact_sheet_web_final_2.pdf",
          "profile": null,
          "mid": null,
          "function": "control propellant flow to the preburner and chamber"
        }
      ]
    },
    {
      "assembly": "Combustion",
      "parts": [
        {
          "part": "Main injector assembly",
          "material": null,
          "form": null,
          "finish": null,
          "standard": null,
          "hardware_ref": null,
          "quote": "staged combustion testing of the preburner and main injector assembly",
          "source_url": "https://www.ulalaunch.com/docs/default-source/news-items/be-4_fact_sheet_web_final_2.pdf",
          "profile": null,
          "mid": null,
          "function": "mixes the preburner exhaust gas with fuel in the main chamber",
          "specs": [
            {
              "label": "Test result (2015)",
              "value": "injector performance, heat transfer and combustion stability matched pre-test predictions",
              "quote": "The test series confirmed pre-test predictions of injector performance, heat transfer, and combustion stability,",
              "source_url": "https://www.satellitetoday.com/finance/2015/09/30/blue-origins-be-4-engine-passes-100-staged-combustion-tests/"
            }
          ]
        },
        {
          "part": "Regeneratively cooled thrust chamber with multiple full-scale injector elements",
          "material": null,
          "form": null,
          "finish": null,
          "standard": null,
          "hardware_ref": null,
          "quote": "regeneratively cooled thrust chamber using multiple full-scale injector elements",
          "source_url": "https://www.satellitetoday.com/finance/2015/09/30/blue-origins-be-4-engine-passes-100-staged-combustion-tests/",
          "profile": null,
          "mid": null,
          "function": "main combustion chamber"
        },
        {
          "part": "Single combustion chamber and nozzle",
          "material": null,
          "form": null,
          "finish": null,
          "standard": null,
          "hardware_ref": null,
          "quote": "although it uses only a single combustion chamber and nozzle.",
          "source_url": "https://en.wikipedia.org/wiki/BE-4",
          "profile": null,
          "mid": null,
          "function": "one chamber and nozzle per engine, unlike the RD-180's twin chambers"
        }
      ]
    },
    {
      "assembly": "Propellant system",
      "parts": [
        {
          "part": "Autogenous tank pressurisation from LNG",
          "material": null,
          "form": null,
          "finish": null,
          "standard": null,
          "hardware_ref": null,
          "quote": "LNG enables autogenous tank pressurization",
          "source_url": "https://www.ulalaunch.com/docs/default-source/news-items/be-4_fact_sheet_web_final_2.pdf",
          "profile": null,
          "mid": null,
          "function": "removes the need for helium pressurisation hardware"
        }
      ]
    },
    {
      "assembly": "Test and production sites",
      "parts": [
        {
          "part": "LNG test facility near Van Horn, Texas",
          "material": null,
          "form": null,
          "finish": null,
          "standard": null,
          "hardware_ref": null,
          "quote": "Blue Origin has built a dedicated LNG testing facility near Van Horn, Texas",
          "source_url": "https://www.ulalaunch.com/docs/default-source/news-items/be-4_fact_sheet_web_final_2.pdf",
          "profile": null,
          "mid": null,
          "function": "dedicated engine test site, commissioned May 2014",
          "specs": [
            {
              "label": "Test capacity",
              "value": "thrust levels greater than one million pounds-force",
              "quote": "the LNG facility can test thrust levels greater than one million pounds-force",
              "source_url": "https://www.ulalaunch.com/docs/default-source/news-items/be-4_fact_sheet_web_final_2.pdf"
            }
          ]
        },
        {
          "part": "Component test facilities, Kent, Washington",
          "material": null,
          "form": null,
          "finish": null,
          "standard": null,
          "hardware_ref": null,
          "quote": "Engine component testing is underway at Blue Origin test facilities in Kent, Washington, and Texas.",
          "source_url": "https://www.ulalaunch.com/docs/default-source/news-items/be-4_fact_sheet_web_final_2.pdf",
          "profile": null,
          "mid": null,
          "function": "engine component testing"
        },
        {
          "part": "Engine factory, Huntsville, Alabama",
          "material": null,
          "form": null,
          "finish": null,
          "standard": null,
          "hardware_ref": null,
          "quote": "In June 2017, Blue Origin announced that they would build a new facility in Huntsville, Alabama, to manufacture BE-4.",
          "source_url": "https://en.wikipedia.org/wiki/BE-4",
          "profile": null,
          "mid": null,
          "function": "BE-4 production facility"
        }
      ]
    }
  ],
  "materials": [
    {
      "id": "aluminium",
      "name": "aluminum (alloy not stated)",
      "material_page": "https://spacemushroom.com/profiles/aluminium/"
    },
    {
      "id": "monel",
      "name": "Monel (nickel alloy)",
      "material_page": null
    }
  ],
  "standards": [],
  "relations": [
    {
      "type": "part_of",
      "target": "New Glenn",
      "target_slug": "blue-origin-new-glenn",
      "note": "7 engines on the reusable first stage of the current 7x2 version",
      "quote": "The first stage is powered by seven BE-4 engines and is reusable, landing vertically.",
      "source_url": "https://en.wikipedia.org/wiki/BE-4"
    },
    {
      "type": "part_of",
      "target": "New Glenn 9x4 (planned larger version)",
      "target_slug": "blue-origin-new-glenn",
      "note": "9 engines on the first stage of the planned 9x4 version",
      "quote": "It has nine BE-4 engines on the first stage, four BE-3U engines on the second stage",
      "source_url": "https://en.wikipedia.org/wiki/New_Glenn"
    },
    {
      "type": "part_of",
      "target": "Vulcan Centaur",
      "target_slug": "ula-vulcan-centaur",
      "note": "2 engines on the Vulcan first stage, 2446.5 kN (550k lbf) each at sea level",
      "quote": "The booster phase begins with ignition of the two BE-4 engines.",
      "source_url": "https://www.ulalaunch.com/docs/default-source/rockets/2023_vulcan_user_guide.pdf"
    },
    {
      "type": "operated_by",
      "target": "United Launch Alliance",
      "target_slug": null,
      "note": "ULA selected the BE-4 for the Vulcan Centaur booster stage (ULA press release of 27 September 2018)",
      "quote": "ULA has selected Blue Origin’s BE-4 engine for Vulcan Centaur’s booster stage.",
      "source_url": "https://www.ulalaunch.com/about/news-detail/2018/09/27/united-launch-alliance-building-rocket-of-the-future-with-industry-leading-strategic-partnerships"
    },
    {
      "type": "operated_by",
      "target": "Blue Origin",
      "target_slug": null,
      "note": "flies BE-4 on its own New Glenn first stage; first New Glenn flight 16 January 2025",
      "quote": "It was later launched on New Glenn for the first time on January 16, 2025.",
      "source_url": "https://en.wikipedia.org/wiki/BE-4"
    },
    {
      "type": "successor_of",
      "target": "RD-180 (NPO Energomash)",
      "target_slug": "npo-energomash-rd-180",
      "note": "intended to end ULA's reliance on the Russian RD-180 first-stage engine",
      "quote": "The BE-4 engine will eventually end ULA's reliance on Russian-built RD-180 first-stage engines",
      "source_url": "https://spaceflightnow.com/2018/09/28/bezos-rocket-engine-selected-for-new-vulcan-rocket/"
    },
    {
      "type": "heritage_of",
      "target": "BE-3 (Blue Origin hydrogen engine)",
      "target_slug": null,
      "note": "builds on BE-3 flight heritage",
      "quote": "Builds on BE-3 Flight Heritage",
      "source_url": "https://www.ulalaunch.com/docs/default-source/news-items/be-4_fact_sheet_web_final_2.pdf"
    },
    {
      "type": "supplied_by",
      "target": "Blue Origin",
      "target_slug": null,
      "note": "designs and builds the engine; the BE-4 is a commercial development funded by private industry",
      "quote": "The BE-4 is a commercial development funded by private industry.",
      "source_url": "https://www.ulalaunch.com/docs/default-source/news-items/be-4_fact_sheet_web_final_2.pdf"
    }
  ],
  "not_published": "No main chamber, injector, preburner or turbopump alloys stated. No standards or grades. More detail: Blue Origin has not published a BE-4 bill of materials: turbopump housings, impellers, preburner, injector, main chamber liner, nozzle and valve alloys are not stated beyond the aluminium housing and Monel turbine of the oxidizer boost pump already in the entry. No supplier is named for any BE-4 sub-part. The thrust-vector-control actuators, gimbal range, igniters and engine controller are not described in any readable source (blueorigin.com returned HTTP 429 on every attempt). Several statements are from 2015 ULA and Blue Origin development reports and describe test hardware, not the flight engine; the November 2025 thrust increase and the first-flight dates come from Wikipedia, whose cited Blue Origin page could not be opened. The BE-4U vacuum variant planned for an earlier New Glenn upper stage is not listed because the plan was dropped. Quotes from the Vulcan User's Guide and the ULA BE-4 fact sheet were machine-checked against the PDF text; quotes from Wikipedia, Via Satellite, Spaceflight Now and the ULA news page came through a text extractor and were not machine-checked. More detail: Blue Origin has not published a BE-4 bill of materials: turbopump housings, impellers, preburner, injector, main chamber liner, nozzle and valve alloys are not stated beyond the aluminium housing and Monel turbine of the oxidizer boost pump already in the entry. No supplier is named for any BE-4 sub-part. The thrust-vector-control actuators, gimbal range, igniters and engine controller are not described in any readable source (blueorigin.com returned HTTP 429 on every attempt). Several statements are from 2015 ULA and Blue Origin development reports and describe test hardware, not the flight engine; the November 2025 thrust increase and the first-flight dates come from Wikipedia, whose cited Blue Origin page could not be opened. The BE-4U vacuum variant planned for an earlier New Glenn upper stage is not listed because the plan was dropped. Quotes from the Vulcan User's Guide and the ULA BE-4 fact sheet were machine-checked against the PDF text; quotes from Wikipedia, Via Satellite, Spaceflight Now and the ULA news page came through a text extractor and were re-checked in a second fetch pass but not against a saved copy of the page.",
  "depth": "partial",
  "photos": [
    {
      "file": "products/context/blue-origin-be-4-1.jpg",
      "alt": "BE-4 engine serial 103 on a Blue Origin transport stand with its blue nozzle cover, April 2018",
      "long": "BE-4 engine serial 103 on a Blue Origin transport stand with its blue nozzle cover, April 2018",
      "kind": "product",
      "credit": "N2e | Own work",
      "license": "CC BY-SA 4.0",
      "page_url": "https://commons.wikimedia.org/wiki/File:Blue_Origin_BE-4_rocket_engine,_sn_103,_April_2018_--_LCH4_inlet_side_view.jpg"
    },
    {
      "file": "products/context/blue-origin-be-4-2.jpg",
      "alt": "Close view of the top (powerhead) of BE-4 serial 103 with plumbing and LNG port",
      "long": "Close view of the top (powerhead) of BE-4 serial 103 with plumbing and LNG port",
      "kind": "product",
      "credit": "N2e | Own work",
      "license": "CC BY-SA 4.0",
      "page_url": "https://commons.wikimedia.org/wiki/File:Blue_Origin_BE-4_rocket_engine,_sn_103,_April_2018_--_top_of_engine.jpg"
    },
    {
      "file": "products/context/blue-origin-be-4-3.jpg",
      "alt": "BE-4 serial 103 from the LOX inlet side with its blue nozzle cover on a yellow stand",
      "long": "BE-4 serial 103 from the LOX inlet side with its blue nozzle cover on a yellow stand",
      "kind": "product",
      "credit": "N2e | Own work",
      "license": "CC BY-SA 4.0",
      "page_url": "https://commons.wikimedia.org/wiki/File:Blue_Origin_BE-4_rocket_engine,_sn_103,_April_2018_--_LOX_inlet_side_view.jpg"
    }
  ],
  "context": {
    "size": [],
    "mass": [],
    "orbit": []
  },
  "licence": "Product data CC BY 4.0, cite Space Mushroom. Photos keep their own licences, given per photo.",
  "mcp": "https://spacemushroom.com/mcp"
}