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WinGD

RT-flex96C

WinGD / Wärtsilä-Sulzer RT-flex96C / RTA96C — Marinediesel, Bohrung 960 x Hub 2500 mm, 15–102 RPM (variable speed, typically 102 RPM at MCR) rpm, 25,320–80,080 kW (14-cylinder variant: 80,080 kW / 108,920 bhp at 102 rpm). Brennstoff: Heavy Fuel Oil (HFO), Marine Diesel Oil (MDO). Status: Legacy / In Service — RTA96C introduced 1994, RT-flex96C introduced 2004. Production now under WinGD (formerly Wärtsilä), licensed to specialized manufacturers. Over 300 units in service worldwide as of 2006+. Environmental regulations tighten phase-out pressure on fossil-fuel versions without upgrades.. Verifiziert, Datenblatt verlinkt.

WinGD RT-flex96C
Per Hersteller-Datenblatt
Capacity
HFO/MDO/MGO/VLSFO
Medium

Engine Specifications

960 mm
Bore
2-stroke
Stroke Type

Components & Design

Component data being added…

Technical Data

Mean Effective Pressure (BMEP) at MCR 19.6 bar
Mean Piston Speed at MCR 8.5 m/s
Specific Fuel Consumption (BSFC) 171 g/kWh (full load, ISO reference conditions 42.7 MJ/kg)
Power per Cylinder (MCR) 6,030–6,720 kW / 8,200–9,120 bhp
Bore/Stroke Ratio 1:2.6 (optimized for low-speed, two-stroke crosshead design)
Maximum Combustion Pressure (Pmax) 153 bar
Stroke/Bore Relationship Long-stroke design ensures efficient propeller matching, service speeds 22–25 knots
Thermal Efficiency Over 50% (among highest for large marine diesels)
14-Cylinder Version Dimensions Height 13.5 m, Length 26.59 m, Weight 2,300+ tonnes
Turbocharging System Turbocharged, variable geometry turbocharger for part-load efficiency

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Common failures & inspection points

A-Frame Column Cracks — Cracks initiated in double-walled A-frame columns at inboard ends of horizontal ribs, propagating vertically. Root cause: weld quality d
www.beyonddiscovery.org/fuel-inject...
Sudden Severe Wear (SSW) / Piston Scuffing — Early RT-flex96C engines experienced SSW leading to severe liner/piston ring wear. Root cause: excessive water carr
en.wikipedia.org/wiki/W%C3%A4rtsil%...
Main Bearing Breaking-Out — Main bearing shells showed premature wear/spalling. Corrective: machining lower shell + bearing cap as single unit to ensure precise
www.beyonddiscovery.org/fuel-inject...
Cylinder Pressure Relief Valve Leaks — Corrosion of shortened relief valve due to thermal exposure (positioned too far from combustion space, running too cold).
www.beyonddiscovery.org/fuel-inject...
Scavenge Air Receiver Cracks — Longitudinal welds in receiver upper/lower seams developed cracks caused by resonant vibration in dividing wall. Inspectors: dye
www.beyonddiscovery.org/fuel-inject...

Type-general inspection and maintenance points for this equipment category — not model-specific.

Service & Maintenance

Large-bore RT-flex maintenance requires close rail system checks, scavenge inspections, drain-oil analysis and bearing trend monitoring.

Suppliers & Spare Parts

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Replacement Parts

Critical spares: rail valves, fuel injectors, exhaust valves, piston rings, selected bearing shells and control electronics.

Manuals

Equipment Model #36774 · discontinued