Page 3rd Cover: of Maritime Reporter Magazine (July 2002)

Italian Maritime Report j

SEA RIDER Infiltrates Small Craft Propulsion Market Official trials from Taiwan Coast Guard Dep. 45 40 - 1 ^ 35 - 30 - 25 - | 20 -Kn 15 - i 10 - | r— 5 - 0 - 1450 1825

Rp m 2090 2300

The Ferry Transport Company Ges- tione Governativa Navigazione Laghi, owned by Italian Government, and the

Taiwan Coast Guard have ordered Sea

Rider propulsion. Gestione Governativa

Navigazione Laghi is responsible for ferry transportation on northern Italian lakes Garda, Maggiore and Como. The line, connecting hundreds of cities and tourist sites along the banks of the lakes, is serviced by a fleet of fast passenger commuters and passenger/vehicles fer- ries. The fast service, started in the late 1950s with the introduction of the first hydrofoils, is being rejuvenating with the introduction of a series of new less expensive catamarans, with larger pas- senger capacity and lower maintenance cost.

The Taiwan Coast Guard, very busy fighting around against smuggling and piracy, were demanding not only a very high speed for their interceptor missions but also a low consumption at cruising speed when patrolling in order to increase their range of action. Last year, an order for building twenty, 49-ft. (15- m) new fast patrol boats, was placed to a shipyard in Taiwan.

Navigazione Laghi tried three differ- ent propulsion systems on four of their catamarans in order to find out the most suitable one in terms of efficiency and operation costs. The vessels tried were:

Carducci (Sea Rider Ti 60) vs. Fosco- lo (Controllable Pitch Propellers)

Citta di Como (Sea Rider Ti 90) vs.

Citta di Lecco (Water jets, competitor-1)

Characteristics of all four crafts are shown below.

From these results, Gestione Governa- tiva Navigazione Laghi has decided to fit the remaining six. 91-ft. (27.7-m) catamarans under construction with Sea

Rider Ti90. Navigazione Laghi has con- sidered overall performance at maxi- mum speed as the most important data, since the estimated operative time for the vessels will be 2.000 hours a year, with 70 percent of the time spent at max- imum power.

Last year the Taiwan Coast Guard decided to build two fast patrol boats fit- ted with Sea Rider Ti25 surface piercing propellers and two fast patrol boats with water jets (competitor-2), in order to accurately define benefits from one or other propulsion type both at maximum and cruising speeds.

Characteristics of these boats follow:

PP-2005 PP-2001

LOA: 49 ft. (15 m) 49 ft (15 m}

LWL: 13.5 m 13.5 m

Hull type: Monohull Monohull

Displacement (full): 20 tons 20 tons

Max. Output: 2 1605 kW @ 2 x 605 kW@ 2,300 rpm 2,300 rpm

Propulsion : 2 x Sea Rider T125 2 x Woterjets (t-2)

It is important to notice that when cruising, at 1.825 rpm, the speed differ- ence is amazing with 15.38 kn for water jets (still in cavitation zone) and 30.71 kn for Sea Rider. The difference in fuel consumption is more than evident. Per- formance at top regime, at 2,300 rpm, is also superior with 38.45 kn for water jets against 39.22 kn for Sea Rider.

Taiwan Coast Guard has ordered a fur- ther 16 sister boats all fitting a pair of

Sea Rider Ti25.

LA.ME SRL - Marine Division

LA.ME srl has been designing propul- sion systems since 1989 and has been producing Sea Rider packages for 10 years.

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Citta di Como Citta di Lecco Corducci Foscolo

LOA: 91 ft. (277 m) 91 ft. (27.7 m) 71 ft. (21.7 m) 71 ft. (21.7) m

LWL: 80 ft. (24.5) m 80 ft. (24.5 m) 65 ft. (19.8 m) 65 ft. (19.8 m)

Hull type: Catamaran Catamaran Catamaran Catamaran

Displacement: 79.5 tons abt. 82 tons' 44.3 tons 42.5 tons

Mox. Output: 2x 1,050 kW@ 2,100 rpm 2 x 1,050 kW@ 2,100 rpm 2 x 610 kW@ 2,100 rpm 2 x 610 kW @ 2,100 rpm

Propulsion: 2 x Seo Rider Ti90 2 x Woterjets (c-)) 2 x Sea Rider Ti60 2 x CPP

Top Speed: 28 kts. 26.7 kts. 27.4 kts. 24 kts. : Due to larger propulsion weigh

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