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WinGD

RTA84C

The WinGD RTA84C is a large‑bore, low‑speed two‑stroke marine diesel engine designed for reversible operation and capable of running on HFO, MDO, MGO or VLSFO.

WinGD RTA84C
Per Hersteller-Datenblatt
Capacity
HFO/MDO/MGO/VLSFO
Medium

Engine Specifications

840 mm
Bore
2-stroke
Stroke Type

Components & Design

Component data being added…

Technical Data

Bore/Stroke Ratio RTA72U 1:3.47
Bore/Stroke Ratio RTA84 1:3.51
Power per Cylinder RTA72U-B 3080 kW @ 99 rpm MCR
Power per Cylinder RTA84C 4050 kW/cyl @ 102 rpm MCR
Type Single-acting, two-stroke, reversible, uniflow scavenged with poppet exhaust valve
Turbocharging Constant-pressure with electrically-driven blowers (cut-in ~40% MCR)
Fuel System Double valve controlled, variable injection timing, electronically-governed
Introduction RTA72U: 1985, RTA84: 1988 (container ships) / 1993 upgrades
Bedplate Single-walled (RTA72U) or Gondola-type welded (RTA84)
Scavenging Uniflow with cylinder-head exhaust valve (Nimonic 80A)

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Common failures & inspection points

Severe cylinder liner wear in RTA72U (8-cyl) on ULSD at slow-steaming speeds: 30 liners replaced within 11 months; liners worn-through in 500 hours
marineengineeringmeblog.wordpress.c...
Piston ring hydraulic locking and breakage: load-dependent cylinder oil system design flaw caused starvation in forward cylinders; excess oil prevented ring com
marineengineeringmeblog.wordpress.c...
Carbon deposits and piston ring degradation on RTA84 forward units during heavy fuel oil operation; inconsistent lubrication quality exacerbates problem
www.scribd.com/document/712754439/R...
Water ingestion in cylinders via scavenge air cooler leakage causes corrosive liner wear; vane-type water separators essential for RTA-C engines post-cooler
squirrel.sr.unh.edu/~jraeder/IAM550...
Chromium-ceramic piston ring (Daros) coating adhesion failure with peeling; hard contact at ring ends causes scuffing
www.scribd.com/document/712754439/R...

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

Service & Maintenance

Follow Sulzer PMS. Large mechanical engines require scheduled fuel pump/cam inspection, bearing checks and scavenge inspection.

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Replacement Parts

Critical spares: fuel pump elements, exhaust valves, piston rings, bearing shells, starting air valves and cylinder cover seals.

Manuals

Equipment Model #36778 · discontinued