^AABF

RT-flex35

Zulu Code Model

Description

Wärtsilä RT-flex35 — a compact two-stroke engine with common-rail fuel injection (RT-flex). Designed for smaller tankers and general cargo vessels requiring 3,000-5,000 kW.

Sulzer/Wärtsilä RTA-series: camshaft-controlled 2-stroke engines

Also known as: sulzer rta engine, rta series, sulzer rta-t, rta96c, wartsila rta, rta, sulzer rta

Specifications

Cycle	2-Stroke
Bore	350 mm
Fuel Injection	Common rail (RT-flex)

Did you know

The Wärtsilä Sulzer RT-flex35 engine was introduced as part of a product development project that began three years prior to its first order in January 2010. This engine belongs to the RT-flex series, which are low-speed two-stroke marine diesel engines featuring electronically-controlled common-rail systems for fuel injection and valve actuation, a technology pioneered by Sulzer and further developed by Wärtsilä.
The RT-flex35 is positioned at the smaller end of Wärtsilä Sulzer's low-speed engine range, with a 350 mm cylinder bore. It is part of a series that extends to larger engines like the RT-flex96C, which has a 960 mm bore and is the largest reciprocating engine in the world.
The RT-flex35 is chosen for its optimal power and speed combinations for small to medium-sized cargo vessels, including handy-size bulk carriers, product tankers, and feeder container ships. Its electronically-controlled common-rail system provides benefits such as low fuel consumption across the operating range, reduced exhaust emissions, smokeless operation at all speeds, and stable running at very low speeds.

Model	Cylinder Bore (mm)	Piston Stroke (mm)	Power/Cylinder (kW)	RPM Range
RT-flex35	350	1550	870	142-167
RT-flex50	500	2050	1745	99-124
RT-flex60C	600	2250	2360	91-114
RT-flex96C	960	2500	5720	102-120

Sources: bairdmaritime.com; wartsila.com; motorship.com; ship.gr; engine.od.ua; wartsila.com; marineengineersknowledge.com; ihmc.us; wartsila.com; wartsila.com; wartsila.com; wikipedia.org; bozhou-int.com; wikipedia.org; bozhou-int.com

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Code map

^A  A  B  F
 │  │  │  └── Model: RT-flex35
 │  │  └───── Make: Wärtsilä Sulzer
 │  └──────── Equipment: Main Engine
 └─────────── System: ME, Propulsion & Steering