Single engine vs.
twin-engine

There are a lot of sailors who will prefer the simplicity of a single-engine installation. The twin installation, however, offers some positive outcomes. It will allow level beaching in between tides, for example. Also, a twin-engine setup will give peace of mind to many people from a reliability point of view. There are negative aspects to a twin installation: more maintenance, weight, and cost with twin shafts, propellers, rudders, and exhaust, not to mention the more significant fuel usage. The LRC58 engine room will be a bit more cramped as well.

The engine choice is very personal and important; access to local servicing can be essential to the decision. All LRC58s have been supplied with Beta Marine (Kubota) engines. To cruise 11-12 knots with an LRC58, the vessel will need the twin engines to produce about 60 shaft horsepower each at a reasonable RPM, meaning not full throttle, so this requires 75-90 hp engines, although a bit more would not hurt. LRC58-05 is equipped with twin Beta Marine 75 hp engines.

Two engine options for the LRC65 twin model can be chosen: Beta 85T or John Deere 4045 DTF 70 (80 hp). The Beta 85T is turbo-charged, while the John Deere is naturally aspired. A ZF45-1 gearbox with a ratio of 3.471 gives a propellor diameter of 700 mm. The LRC65 cruise speed is 10 knots.

The single-engine LRC65 will have a 147 hp (110 kW) engine. This version will have an 830 mm propeller and also cruise at 10 knots.

XPM78-01 Mobius is fitted with a Gardner 6LXB, 112 kW (150 hp) @1650 RPM 100% duty cycle. XPM78-02 Vanguard will get twin JD 4045 engines and hybrid electric drives backed by a large split Lithium battery bank (2 x 60 kW).

XPM85-01 is designed to get twin Scania 250 hp engines with CPP propulsion.

Drawings and cutting files are available for all models for single-engine and twin-engine versions.