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Wartsila RT-flex50 low-speed marine diesel engine is applicable for wide types or dimensions ships: from handysize and Panama bulk carrier to oil tanker and container carrier.
Maximum output power: 6100 to 13960kw, with speed of 99-124rpm.
The fuel injection and valve drive are controlled under the full electrically controlled common rail system.
| Cylinder Bore | Stroke | Rotating Speed | R1 Mean Effective Pressure | Piston Speed | Fuel Oil |
| 500mm | 2050rmm | 99-124rpm | 21.0bar | 8.5m/s | 700cSt/50° |
| Rated Power, Dimensions and Weights | ||||||
| Number of Cylinders | Output in kW at | Length | Weight | |||
| 124rpm | 99rpm | |||||
| R1 | R2 | R3 | R4 | |||
| 5 | 8725 | 6100 | 6975 | 6100 | 5582 | 200 |
| 6 | 10470 | 7320 | 8370 | 7320 | 6462 | 225 |
| 7 | 12215 | 8540 | 9765 | 8540 | 7342 | 255 |
| 8 | 13960 | 9760 | 11160 | 9760 | 8222 | 280 |
| Dimension | B | C | D | E | F | G |
| 3150 | 1088 | 7646 | 3300 | 9270 | 1636 | |
| Automatic Fuel Consumption | ||||||
| Full Load | ||||||
| Stage Point | R1 | R2 | R3 | R4 | ||
| Brake mean effective pressure | 21 | 14.7 | 21 | 18.4 | ||
| IMO Tier I | RT-flex | Standard Adjustment | 169 | 163 | 169 | 165 |
| IMO Tier II | RT-flex | Standard Adjustment | 171 | 165 | 171 | 167 |
| Part Load，% of R1 | 85 | 70 | 85 | 70 | 60 | |
| Variable Standard | Standard | Standard | Delat | Delat | Low-Load | |
| IMO Tier I | 165 | 164.7 | 164.7 | 164 | - | |
| IMO Tier II | 167.8 | 167 | 167.1 | 165.5 | 164.5 | |
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