OceanSphereENGINES

X72-B

Main Engine 2-Stroke · Main Engines (2-Stroke)

Technical data from manufacturer or class sources · not yet verified by a person​​‍​⁠⁠‍‌​⁠‌‌‌​​​​⁠‍‌
720 mmBore
HFO/MDO/MGO/VLSFOMedium

The WinGD X72‑B is a low‑speed, camshaft‑less 2‑stroke main engine delivering up to ~20 MW per cylinder, notable for its high power density and ability to run on conventional heavy fuel oil as well as alternative fuels such as LNG, methanol or ammonia.

Specifications

Technical data.reference — unverified

Do you have the manufacturer datasheet for this model? Send it with the enquiry form — we check it and name the source.

Stroke/Bore Ratio4.29
MEP X72 Diesel R120.5 bar
MEP X72DF Standard R117.3 bar
MEP X72DF-1.2 R115.7 bar
BSFC X72 Diesel167 g/kWh at full power (Tier II)
BSFC X72DF-A-1.0 Diesel168.8 g/kWh at 89 rpm, 8 cyl
Gas Consumption X72DF-A-1.0 Ammonia368.1 g/kWh at max rating
Power per Cylinder X72DF-2.13,225 kW/cyl at 89 rpm
Injection SystemCommon Rail, electronic control
Engine TypeCamshaftless 2-stroke, reversible, low-speed
Service

Service notes.

What our service work and the manufacturer documentation say about keeping this model running.

Follow WinGD PMS. Review scavenge inspections and drain-oil results before planning piston pull and liner honing.

Inspection

Inspector Detail ✓ verified

Designation decoded

X steht für WinGD Generation X, 72 für Bohrung 720 mm, B für kompakte Bauweise.

Background

Der WinGD X72-B ist ein großer Zweitakt-Langsamläufer mit 720 mm Bohrung für große Bulker (Capesize), Tanker (Suezmax/VLCC) und Post-Panamax-Containerschiffe. Die 720 mm Bohrung konkurriert direkt mit dem MAN S70ME-C (700 mm). Der X72 ist ein Volumenmodell in WinGD's Portfolio.

Inspector checklist

Laufzeug & Tribologie
  • Zylinderlaufbuchsen: 720 mm Bohrung — hohe thermische Belastung. Scavenge-Port-Inspektion alle 4.000 h
  • Kolbenringe: WinGD-Konfiguration, Stoßspiele bei 720 mm langen Ringumfängen
  • Kreuzkopf-Lager: Bei 720 mm signifikante Kolbenmasse — Temperatur-Monitoring, BWMS
Common-Rail & W.I.S.E.
  • Common-Rail: Raildruck, Hochdruckpumpen — bei 720 mm hoher Durchsatz
  • W.I.S.E.: Software, Diagnosedaten
  • Einspritzventile: Düsenzustand, Spray-Pattern
  • Auslassventil: Hydraulische Steuerung, Hub, Drehung
Brennstoffsystem
  • Feinfilter vor Rail: Catfines-Schutz bei hohem Durchsatz
  • Purifier-Kapazität
  • Brennstoff-Vorwärmung
Dichtungssysteme
  • Stopfbuchsen: Große Kolbenstange bei 720 mm, Drainage
  • Auslassventil: Ventilsitz, Drehung
  • Spülluftkasten: Drainage, Brandrisiko
Fundamentrahmen & Kurbelwelle
  • Kurbelwellen-Deflexion: Regelmäßig messen
  • Grundlager: Lagerspiele, Öltemperaturen
  • Ankerschrauben: Ultraschall-Vorspannung bei Docking

Logbook reference values

ParameterExpectedDeviation means
Abgastemperatur nach Zylinder340-410 °C bei MCR>20 °C Spread → Einspritzproblem
Common-Rail-Druck800-1000 barAbfall → Pumpe oder Rail
Pmax pro ZylinderGemäß Shop-Test ±3 barSpread >5 bar
Spülluftdruck3.0-3.6 bar abs bei MCRZu niedrig → Turbolader
Zylinderöl-Feed-Rate0.7-1.0 g/kWhAn BN anpassen
Kurbelwellen-DeflexionGemäß WinGD-Tabelle X72Überschreitung → Fundament oder Lager

Common Failure Modes

  • Common-Rail-Pumpen-Verschleiß bei hohem Durchsatz

    Symptoms: Raildruck-Trend abfallend, Druckpulsationen

    Causes: Catfines-Abrasion, Langzeit-Verschleiß, Brennstoff-Kontamination

    Preventive: Brennstoff-Feinfilter, Raildruck-Trend dokumentieren, Pumpeninspektion gemäß Intervall.

  • Kreuzkopf-Lagerschaden

    Symptoms: Temperaturanstieg, Metalldetektor, Vibration

    Causes: Ölfilm-Zusammenbruch bei Slow-Steaming, Partikelkontamination, 720 mm Kolbenmasse

    Preventive: Temperatur tägliche Auswertung, Zylinder-Cut-Out bei Slow-Steaming.

  • Liner-Verschleiß

    Symptoms: Zylinderöl-Verbrauch, Leckgas

    Causes: Feed-Rate, VLSFO-BN

    Preventive: Scavenge-Port alle 4.000 h.

Expert tips

  • X72-B vs. MAN S70ME-C: Ähnliches Leistungssegment, aber 720 vs. 700 mm Bohrung — Teile sind NICHT austauschbar, auch Referenzwerte sind verschieden
  • Common-Rail bei 720 mm: Hoher Brennstoffdurchsatz bedeutet stärkere Belastung der Hochdruckpumpen — Pumpen-Redundanz und Ersatzteillage prüfen
  • WinGD Lizenzbauer können in Fertigungsqualität variieren — bei Problemen den konkreten Lizenzbauer identifizieren

Related components

  • Common-Rail-System (hoher Durchsatz)
  • W.I.S.E.-Steuerung
  • Turbolader (ggf. 2 Einheiten)
  • WinGD CLU
  • Brennstoff-Feinfilter
  • Kurbelwelle und Grundlager
  • Wellenleitungssystem

Classification & regulatory

IMO Tier II. Tier III mit SCR/EGR. EEDI Phase 2/3.

Reference content for inspector orientation. Always verify against manufacturer's manual, latest service letters and class society requirements.

Spares

Replacement Parts

Spare parts notes

Keep piston rings, exhaust valves, fuel injection equipment, starting air valve kits and control oil/rail spares.

Documentation

Manuals

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