| Vessel Make: | Randell 41 |
|---|---|
| Vessel Weight: | 12T |
| Old Engines: | 2x Volvo TAMDC70C |
| New Engines: | 2x FPT NEF 400 |
| New Engine Power: | Derated to 330HP @ 3000rpm |
| Vessel Gearbox: | 2x Twin Disc Remote V gearboxes |
| Vessel Cruise Speed: | 20kn @ 2400rpm |
| Mas Spped: | 26kn @ 3000rpm |
The Randell 41 was originally powered by two Volvo TAMD70C engines, each delivering 260HP at 2800rpm. While reliable in their prime, these engines had started to lose their edge, impacting the vessel’s overall performance and reliability. The owner sought a solution that would not only restore but enhance the vessel’s capabilities for long-distance cruising and demanding conditions.
After careful consideration, we decided to repower the Randell 41 with two FPT NEF 400 marine engines, derated to 330HP at 3000rpm. The decision was based on the engines’ reputation for reliability, efficiency, and superior performance. Additionally, the FPT engines offered a very similar engine mount location to the Volvo 70 series, ensuring a straightforward installation process.
To ensure compatibility and maintain the integrity of the vessel’s existing setup, the two Twin Disc Remote V gearboxes with a 2:1 ratio, the original 1 3/4 shafts made from 316 stainless steel, and the 4-blade propellers were reused. This ensured that the new FPT marine engines would work seamlessly with the existing components, providing a cost-effective and efficient solution.
The repower resulted in significant performance improvements. The boat now leaps out of the water, showcasing increased power. With the new FPT NEF 400 marine engines, the Randell 41 achieved the following speeds:
- 9 knots @ 1400rpm with a fuel burn of 9.4l/h per engine
- 16 knots @ 2200rpm with a fuel burn of 31l/h per engine
- 20 knots at @2400rpm with a fuel burn of 37l/h per engine
- 26 knots @ 3000rpm with a fuel burn of 65l/h per engine
The new engines did not display any smoke, significantly improving the vessel’s environmental footprint. The overall reliability of the vessel has greatly improved, ensuring safer and more dependable journeys.
