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WinGD

RT-flex60C

Wärtsilä-Sulzer RT-flex / WinGD RT-flex — Marinediesel, Bohrung 680 (RT-flex68T-B), 600 (RT-flex60C), 500 (RT-flex50), 580 (RT-flex58T-E), 960 (RT-flex96C) x Hub 2720 (RT-flex68T-B), 2250 (RT-flex60C), 2050 (RT-flex50), 2416 (RT-flex58T-E), 2500 (RT-flex96C) mm, RT-flex60C: 91-114 rev/min | RT-flex68T-B: 95 rev/min | RT-flex50: 99-124 rev/min | RT-flex96C: 92-102 rev/min | RT-flex58T-E: 115 rev/min rpm, RT-flex60C: 8250-21240 kW | RT-flex68T-B: ca. 18000-25000 kW (estimated) | RT-flex50: 6100-13960 kW | RT-flex96C: 25320-84420 kW | RT-flex58T-E: ca. 13000-17400 kW (estimated). Brennstoff: HFO (Heavy Fuel Oil), VLSFO (Very Low Sulfur Fuel Oil), Diesel, LNG (DF variants), Methanol (dual-fuel variants). Status: Legacy / Production ended for RT-flex60C/68T-B (Wärtsilä era, pre-2010s); Current production under WinGD (RT-flex50-D, RT-flex58T-E as active models, 2020-2026). RT-flex68 upgrade (IMO Tier II version) tested 2011 (https://www.wartsila.com/media/news/07-03-2011-upgraded-wartsila-rt-flex68-d-successfully-tested-for-imo-tier-ii-compliance). Production milestone: >500 RT-flex engines delivered as of 2010s (https://www.rivieramm.com/news-content-hub/news-content-hub/rt-flex-engines-top-500-sales-48753).. Verifiziert, Datenblatt verlinkt.

Per Hersteller-Datenblatt
Capacity
HFO/MDO/MGO/VLSFO
Medium

Engine Specifications

600 mm
Bore
2-stroke
Stroke Type

Components & Design

Component data being added…

Technical Data

BMEP (RT-flex60C) 19.5 bar (https://es.scribd.com/doc/89737271/Wartsila-O-E-RT-flex60C-MIM)
BMEP (RT-flex68T-B) 19.6 bar (source: marine engine comparison)
Power per cylinder (RT-flex60C) 2360 kW/cyl at 114 rev/min (https://es.scribd.com/doc/89737271/Wartsila-O-E-RT-flex60C-MIM)
Power per cylinder (RT-flex68T-B) 3070 kW/cyl at 95 rev/min
L/D ratio (RT-flex50) 4.10 (https://www.researchgate.net/figure/WinGD-RT-Flex50DF-engine-dimensions_tbl1_337459240)
L/D ratio (RT-flex58T-E) 4.17 (https://wingd.com/media/05fd4m35/rt-flex58t-e_20240718_1654.pdf)
SFOC (RT-flex50) 169 g/kWh at full load MCR (https://www.wartsila.com/media/news/01-10-2007-upgraded-wartsila-rt-flex-50-engines)
Fuel injection system Electronic common-rail with 3 injectors per cylinder, pressure >100 MPa (https://www.dieselduck.info/machine/01%20prime%20movers/rt_flex/2004%20Wartsila%20RT%20Flex%20desc.pdf)
Servo oil pressure up to 200 bar (https://chiefengineerlog.com/2022/11/21/what-you-need-to-know-about-sulzer-rt-flex-engine/)
Crosshead bearing lateral wear rate ~30 μm per 1000 hours (reduced from RTA via crosshead design) (source: Wärtsilä technical documentation)

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Common failures & inspection points

Cold corrosion of piston rings and cylinder liner wear in slow-steaming operation with high-sulfur HFO. Wärtsilä RT Flex 82-T experienced peeling of chrome pist
www.exxonmobil.com/en/marine/techni...
Servo oil leakage at Injection Control Unit (ICU) relative sliding surfaces (high-pressure fuel and servo oil at >100 MPa). Fuel condensation risk during heavy
chiefengineerlog.com/2022/11/21/wha... www.atlantis-press.com/article/17508.pdf
Common-rail fuel system sensitivity to fuel quality mandates strict treatment and filtration. RT-flex engines require verified compatibility with HFO, VLSFO, an
www.marineengineersknowledge.com/20...
Crosshead bearing white metal corrosion and wiping failure under high combustion pressures (up to 200 bar) if servo oil cooling/filtration inadequate. Condition
marineengineeringonline.com/cross-h...
Exhaust valve control solenoid piloting precision requires dual servo oil pump redundancy. Single pump failure prevents exhaust valve modulation, forcing engine
chiefengineerlog.com/2022/11/21/wha...

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

Service & Maintenance

Follow RT-flex PMS with rail pressure/function checks, scavenge inspection and drain-oil analysis. Piston overhaul is condition-based.

Suppliers & Spare Parts

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Replacement Parts

Critical spares include rail valves, injection valves, exhaust valves, piston rings and cylinder cover seals.

Manuals

Equipment Model #36771 · discontinued