EnergyTech Marine Group- Full Hybrid-Diesel Electric Global Cruising Sailing Yachts

	Introducing A New Faster Displacement Hull Powered Sea Trial Overview At Last, a global passage-making displacement hull that will truly power fast as well as sail fast from EnergyTech Marine Group™, builders of advanced propulsion super yachts 619-379 0060 The 83 foot EnergyTech Marine yacht is offered with diesels or electric motors. The motors are powered by our own Arc Lite Pulse Buffering Power Core energy system. Both models are fast global range displacement cruising vessels. 1st phase tests are with diesels only. Vessel is tested at finished half load weight. Compensating lead weight has been added. Test 1… Diesel VS Electric Fuel consumption on diesels was mapped. Then we empirically measured exact kilowatt power absorption at all stages of direct-coupled diesel propulsion (without transmissions) via sea trials. We then carefully measured kilowatt power consumption of all house-loads. Then scientific instruments were used on the test bench to measure precise kilowatt-hour energy consumption requirements, plus losses for the Power Core to deliver the precise kilowatts demanded for all applications. Specific fuel consumption for engine loading for each mode was measured and compared to determine relative energy efficiency. Electric operation far exceeded the performance with direct-coupled diesels or diesel AC generators. See the Pulse Buffering Power Core write-up on the home page. Test 2...Speed…The Problem Is Sailboats Don’t Power Very Fast But the design mandate required this new sailing yacht to power and sail faster than trawlers and displacement motor yachts of the same size. This is tough because normal sailboats squat as they approach higher speeds. The stern wave is lower than the bow wave and eventually when you go fast enough the tail drops like an elevator into its own trough. This causes the bow to plow and create ever more wave drag as it tries to climb its own bow wave (hull speed). Also the more the stern drops the more blunt the edge that is presented by the bow. When you initially design a sail boat hull you get to choose whether you want better performance at slow speeds (like light air) or at high speeds (like trade winds or motoring). We don't use slow sailing speeds in our mission profile so we chose a high prismatic which can greatly increase the top speed for motoring and sailing. This allows you to break above the tradiitional hull speed number (1.34 times the square root of the water line length). With the right prismatic you can increase the multiplyer up into the 1.7s. This along with our new wave entrapment hull shape plus lifting strake nacelles give us speeds that are very fast for a displacement hull. For this test we will determine if our radically new hull design accomplishes any of these goals. View the results. You can see it happening. Test 3… Can Jet Drives Power A Sailing Yacht? If they could it would be one of the greatest advances in cruising sailing. No drag from props shafts or struts under sail. The sailing efficiency increase would be enormous. Imagine the drag if you had all that same mechanical gear strapped to the top of your car. Now imagine dragging it through water instead of air. We are confident that the elimination of this large amount of drag will win back the light wind sailing issue for us even though we have a prismatic designed for high speeds. We could end up with high performance on both ends of the spectrum. Many experts said the jet drives wouldn’t work. They predicted severe cavitation at low speeds. They did not know about UltraJet tractor type drives. They produce zero cavitation at displacement speeds. Watch the videos for clear proof. Let’s Get Started The electric propulsion system far exceeds the direct-coupled diesels for efficiency. In some test measurements fuel cost efficiency was five times as good as the direct-coupled diesels. See the Pulse Buffering Power Core write-up on the home page.

	Powered Sea Trials Exceed Expectations

	Speed Is A Relative Thing Displacement hulls are what you use for real ocean passages. Even though you know this, there are many people new to yachting who do not. Sailing yachts are displacement hulls. This means their hulls move through the water submerged. To go somewhere they push all the water in front of them out of the way as they move through it. A planing hull gets up on top of the water and glides over it like skipping a stone. There are many first time buyers for large yachts who have never been on an extended ocean passage on an 80-some foot boat. A ride on a cruise ship doesn’t count. A charter, nestled in the islands doesn’t count. Sometimes they ask, “If I want to cruise really fast why can’t I just buy a 30 knot planing boat?” “ Can’t I just drive it around the ocean like a car in a parking lot?” Maybe you can on some sunny morning in close to shore but once you get out in the real ocean in the trade winds it's different. Rent “The Perfect Storm” or watch “Deadliest Catch.” The open ocean is usually way too lumpy for a planing vessel so for open ocean passages we are stuck with displacement speeds. A displacement hull is much safer & more comfortable, but most important it can go in almost any weather. A sailing yacht also has to pass a long keel filled with tons of ballast through the water. It's the weight in that keel, though, that keeps you right side up when things get scary. It can be the difference between a rolicking fun day of pleasurable sailing and life threatening rolling and pitching. People usually choose sailing yachts for real long voyages because they are so much more comfortable and so much safer than motor yachts in the open ocean. The trade off for that safety and comfort is that they have been slower than displacement motor yachts, until now. The challenge is to make a displacement sailing hull go fast. We are at the break-through edge of that puzzle.

	For Those Who Simply Can’t Tolerate Going Slow “In theory we knew it would be fast but to split the waves at level attitude at these speeds was unreal.”

	The EnergyTech Hull Design! ”Amazingly Fast.. It All Worked” New wave entrapment design keeps it on top of the water at high displacement speeds. Photos displays cruising at 12 knots .

	See It Lift Up On The Wave At The Stern (It Rides Level) The lift helps sailing or powering at high speeds. Hard chines resist lateral drift for sailing. Another reason for this favorable performance is that enormous form drag has been eliminated from under the hull. There are no props shafts or struts below water because of the jets. Jets leave a cleaner underbody with less drag and less turbulence. It results in less wave drag to plough through at high speeds. We are experiencing no squat at higher speeds. It powers more like a motor yacht but with all the open ocean stability of a displacement hull and that's a very good thing. All of these attributes also contribute to fast sailing.

	Unique Hull Design As the quarter wave surges to crest at the stern it is entrapped between the nacelle lifting strakes. This traps the lift and stops it from spilling out from under the sides and letting the tail squat. Winglets on modern jet wings perform some of the same functions as well as reducing turbulence.

	The Principle Is Clearly Visible & The Effect Is Obvious See the quarter wave as it moves to the stern (and basically becomes the stern wave) surge & crest at the nacelles. This is not a sea condition, it is the wave created by the form drag and friction of moving the tons of water out of the way as the vessel moves through the water. You must then overcome the wave drag in addition to the form and friction. It is identical in flat calm (Watch the videos later). We use this constant wave to charge the jet drives and then we entrap it to lift the stern. It’s your wave you made it..use the free lift. This keeps our angle of attack more level and creates less wave drag, less form drag, and offers less wetted surface reducing friction drag. This makes us go faster with less energy under power or sail.

	Cavitation Free Jets Deliver High Thrust/High Cruise Speed Jets rule the day (they said it couldn’t be done on a sailing yacht…they were wrong).

	It’s One Thing To Reach These Speeds At Max Throttle, But…. To cruise at these speeds at half power is amazing. Even if you don’t like sailing you’d have to love going slow to choose a displacement trawler over the performance of this faster advanced vessel. Professional observers are seriously suggesting we offer a non-sailboat version as a straight passage making fast displacement power yacht. Their suggestions are because of the faster cruise speeds and superior stability and safety. Speed Tests Top speed tests peaked at 14 knots. Sustainable runs were recorded at 13 knots in calm water. For cruise speed we recomend 1800-2000 rpm which produces 10.5-11 knots at an economical fuel burn. …More to come. Call for details on trade-ins, manufacturer’s rebates, $2 million guaranteed cash charters & manufacturer’s financing!

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