http://www.maritimejournal.com/news101/power-and-propulsion/mercedes-amg-powers-fastest-electric-boat Mercedes AMG powers fastest electric boat By Dag Pike 27 Jun 2013
[image http://www.maritimejournal.com/__data/assets/image/0006/829131/MJJUNE13PP-Electric-Boat-Dag.jpg The weight of the motors is concentrated well aft and low down to maximise the high speed performance ] No, this electric cigarette is not a new way of smoking but a new type of performance boat that takes electric propulsion to very high performance level. Miami based Cigarette Racing has built one of its 38 foot Top Gun performance powerboats with electric propulsion that is claimed to give the same level of performance as its gasoline powered versions. With electric motors installed which produce 2,220 hp this is not only the fastest electric boat ever built but also the most powerful. The development of this exciting new concept could open the way for high speed electric patrol boats for military and para-military operations. In developing this electric powerboat, Cigarette Racing worked with Mercedes AMG, the German sports car builder, which has brought advanced electric car technology to the development. This has been translated into a marine system that sets new standards in ability and performance. The drive system for this electric version follows the same pattern as the standard 38 Top Gun layout with two independent drives, each of which has the latest Mercury M8 stern drive capable of absorbing the high torque of the electric motors. As for the electric drive system itself, the Top Gun has no fewer than 12 electric motors, each one producing 185 hp to create the massive total of 2,220 hp. These motors are the same as those used in Mercedes cars. The electric motors are arranged in a star formation with six on each drive shaft. Three are in front of the central gearbox and three at the rear in an alternate arrangement with the matching gearbox between them. The drive shaft connecting to the stern drive emerges from the centre of the gearbox. This creates an incredibly compact layout with a high power density and, as Cigarette says, it allows the weight of the motors to be concentrated well aft and low down to maximise the high speed performance. The batteries that store and supply the power are installed under the cockpit floor. These are the latest lithium ion batteries and there are 48 battery modules, each one containing 72 battery cells. This is claimed to be the optimum arrangement, with the 3,456 cells minimising the space requirements whilst producing the 400 volts DC on which the system operates. The maximum battery capacity is 240 kW/hour and the maximum output is 2,400 kW to match the motor power at full speed. This direct current from the batteries is taken to an individual inverter for each electric motor. These inverters convert the direct current into a three phase alternating current which is required for the permanent magnet synchronous motors. These in turn are controlled by the AMG developed power train controller to give the fine speed control and reverse required for handling this boat. The top speed is claimed to be over 100 mph, which is certainly fast by electric boat standards. More important for users is the duration. The figures from Cigarette suggest that the boat can cruise at 70 mph for an hour, including occasional bursts of full speed running, and still have enough charge to make it back to harbour. Drop the speed to a more gentle 50 mph and the duration extends considerably. Further information www.cigaretteracing.com [© Mercator Media 2013] http://electric-vehicle-discussion-list.413529.n4.nabble.com/EVLN-German-Torqeedo-e-Speedboat-tp4662468.html EVLN: German Torqeedo e-Speedboat ... powerplant isn’t cheap — it’s expected to cost over $23,000 for the outboard alone, plus between $36,000 and $73,000 for batteries depending on their capacity — it’s initially being marketed only to commercial users. It’s not as fast as the outrageous AMG cigarette boat, but it certainly has its... in Electric Vehicle Discussion List on Apr 15 by brucedp5 — 0 replies in thread For all EVLN posts use: http://electric-vehicle-discussion-list.413529.n4.nabble.com/template/NamlServlet.jtp?macro=search_page&node=413529&query=evln&sort=date Here are today's archive-only EV posts: EVLN: Chinese-Saudi Amsia plans Brazil's 1st EV & hybrid plant EVLN: U.S.-made 40' Chinese-BYD e-buses ordered EVLN: Li-ion manufacturers are in a Darwinian fight for survival EVLN: “Monster” Tajima’s E-RUNNER Wins in Electric Class @2013 Pikes Peak + EVLN: Tesla-S family pays ~$40 for ~$8 of electricity @Forks, WA RV park {brucedp.150m.com} -- View this message in context: http://electric-vehicle-discussion-list.413529.n4.nabble.com/EVLN-Mercedes-AMG-powers-fastest-electric-cigarette-racing-boat-tp4664075.html Sent from the Electric Vehicle Discussion List mailing list archive at Nabble.com. _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
