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sea crossings to China during which exten- sive tests have been conducted to establish actual in-service results. On one trial voyage of just over 330 hours, of which about 41 percent was under sail, an average speed of 11.04 knots was attained with an average engine output of 832 bhp, including electric power generation. Dis- placement of the 1,600-dwt vessel varied between 1,170 and 2,090 tons and the mid- ships draft between 2.65 and 4.38 meters (9 and 14 feet). Average fuel consumption for the voyage was 129.4 liters per hour. The thrust gained from use of sails re- duces main engine output, an effect of an automatic load control computer maintain- ing a preset ship speed. The computer also can over-pitch the cp propeller so that the slip percentage remains constant. An automatic computer controls the hy- draulically driven sail functions, including opening, closing and trimming, to provide best results from prevailing wind conditions. The sails on the Shin Aitoku Maru are rectangular, laminar flow-type rigid steel and canvas, 8 meters wide by 12.15 meters high. The main engine is derated from an out- put of 2,000 bhp at 280 rpm to 1,600 at 250 rpm. Because of the lower engine speed a larger propeller has been used and engine fuel consumption is also helped by the option to use heavy fuel. A shaft generator system using a variable capacity hydraulic pump is also claimed to reduce consumption of higher grade oil. AITOKU MARU Length 217 ft. Beam 35 ft. Depth 17 ft. Draft 6 ft. DWT 1,600 tons Main engine Daihatsu 6DSMA-32F mcr 1,600 at 500 rpm Sails (2) rigid Sail area 160 sq. m. Hitachi Zosen Delivers Car Carrier Toyofuji 7 The 10,848-dwt, diesel-powered vehicle car- rier Toyofuji 7 (shown above) was delivered recently to Toyofuji Kaiun Kaisha, Ltd. of Japan by Hitachi Zosen, Tokyo. The ship was built at the Setoda Shipyard of Naikai Zosen, a Hitachi affiliate. The vessel is 178 meters long by 29 meters wide by 26.2 meters deep (approximately 584 by 95 by 86 feet), and can transport up to 4,024 passenger cars and small trucks, as well as knockdown assembly car compo- nents and freight containers. The Toyofuji 7 is powered by a Hitachi B&W twin-bank diesel engine, type 2x8K45- GTCA, providing a service speed of 18 knots. The seventh and eighth of the ship's 12 car decks were specially designed: the aft com- partments have elevator decks to load con- tainers, while the fore compartments are used to hold cars. The ship is fitted with ramps at the stern and midships. The mid- ship ramp is adjustable to three different heights enabling cars to exit and enter from the fifth to seventh decks. November 1, 1981 Bayou Black Delivers All-Aluminum 'Frontier I' Bayou Black Shipyard of Gibson, La., re- cently delivered one of several 42-foot all- aluminum crewboats — the Frontier I — to Frontier Marine of Morgan City, La. The vessel has a length of 42 feet, a beam of 13 feet, and a depth midship of 6.5 feet. Fuel capacity is supplied by an independent 300-gallon tank located in the lazarette. Main propulsion of the vessel is provided by two Detroit Diesel 6-71 engines, each rated at 174 bhp at 1,800 rpm, driven through Allison model M reduction gears supplied by George Engine Co. of Morgan City. Propellers furnished by Toups Propellers of Abbeville, La., are 28-inch by 28-inch Columbian bronze hydrosonic. Shafts are 2-inch stainless steel. Both engines are elec- tric start with power provided by two 12- volt dc batteries. The vessel's air-condition- ing power is provided by a two-cylinder John Deere 7'/o-kw generator. George Engine supplied the Detroit Diesel propulsion engines for "Frontier I." Electronic equipment consists of a Stand- ard Horizon VHF-FM radio, and a model No. 240 Mark II Furuno radar. Engine con- trols are Morse and the steering system is a self-contained hydraulic type. The vessel is USCG certified to carry 16 passengers and a crew of two. repair at the crossroads Ideally located for speed, economy and convenience a complete American SHIP REPAIR SERVICE tanker work a specialty PUERTO RICO DRYDOCK REORGANIZES New Experienced Management. Expanding all facets of the Repair Facility. New Machine Shop adjacent to Graving Dock, formerly outside premises. Providing direct/individual Ship Supervision. New Mobile Crane, 45 Tons. Increased stock of steel (AESS/LR). Direct access to U.S. Suppliers. Puerto rico drydock & MARINE TERMINALS, INC. P.O. BOX 2209, SAN JUAN, PUERTO RICO 00903 CABLE ADDRESS: DRYDOCK TELEX: 345-0021 TELEPHONE 1 (809) 723-6010 Write 204 on Reader Service Card
