26-08-2017, 08:54 | |
Boat: crowther trimaran 33 | . There is not much reason to consider motoring speeds. |
26-08-2017, 09:47 | |
are more complicated. The formula for catamaran is 1.34*(wetted length)1/2; however, this drag formula is generally not the limiting factor for catamaran speed. This is because with waterline length to beam ratios greater than 8:1 are not limited by hydrodynamic drag factors, whereas smaller need to plane to do so (planing requires enormous amounts of power for hulls). A more important factor to consider is the prismatic coefficient, Cp. Cp = V/(LBP*Am), where V is the volume of displaced by the , LBP is the length between perpendiculars, and Am is the area at midship. I felt really smart for a few seconds....but I copied all that from ...have no idea what it means. | |
26-08-2017, 10:16 | |
. However, narrower hulls can get away with a lower prismatic coefficient. The ideal range of Cp for a catamaran is between 0.61 and 0.65. There are a few ways of increasing the prismatic coefficients: sailors can use bulb bows, a wide planing aft segment, or a flat hull rocker in conjunction with a bustle aft. Though high prismatic coefficients increase drag at low speed, at high speeds they can reduce drag by as much as ten percent. I think what all this means is that if you put a 60hp in a 30' cat, it gonna go like hell. That's all I got to say about it; and I'm sticking to it. | |
26-08-2017, 11:37 | |
Boat: Hitchhiker, Catamaran, 40' | |
26-08-2017, 13:25 | |
Boat: Prout Snowgoose 35 | at a good cruising with a 30hp . More often that not I get around 5-6knts. The same Cat with a 40hp will do close to 8knts. I've been on larger catamarans that will easily do 10knts using just one engine, but perhaps something in the 7knt range is more common for Lagoons and the like. |
26-08-2017, 13:57 | |
450 cruises on one 54 HP engine at 2200rpm around 6knots at of around 3.8 litres per hr. With Both engines at 2400 revs 8.3 kn with 9.4 litres per hour. Both engines flat out 9.1 knots 3000 is 20.5 Litres per hour | |
26-08-2017, 14:11 | |
Boat: Chamberlin 11.6 catamaran | at about 8-9 knots top speed. Going 8 knots will use about 50% more than 7 knots so you motor at 6-7 instead. Drag is related to the square if the boat speed so going fast needs huge amounts of power and fuel. I added a second motor to my boat - and got an extra 1 top speed with almost double fuel consumption - 9.9 knots now. Sailing cats and power cats have very different shapes. A power cat has straight aft sections and a sailing cat has upsweep in the line. The two are very different and you can't make a power cat shape well when sailing in lighter winds and upwind and you can't make a sailing shape work well at high speeds under power. Just chill out and go at 7 knots. Even though our boat has hit 19.9 knots, we average about 7.5 to 8.5 most of the time. You don't go that fast. |
26-08-2017, 14:29 | |
Boat: Fountaine Pajot - Lucia 40 | , |
IMAGES
COMMENTS
Gunboat 68 (+35Kts) Gunboat 68 is a cruising catamaran designed to reach the highest speeds possible. Made by Gunboat, the ship uses Grand-Prix racing boats' designs to develop the speediest cruising catamaran on the market. Gunboat 68 is made entirely from carbon composites, which keeps the ship lightweight and fast.
The Ice Cat 61 is a luxury catamaran. At 61 feet (18.60 meters) long, it is a large catamaran that has been designed with both speed and stability in mind. While its average cruising speed is 12 knots, it can achieve up to 25 knots. The ICE Cat 61 has been designed with carbon and glass fiber - materials that allow the boat to be lighter.
2) Cruising Catamarans. Another type of sailing catamaran is a cruising catamaran. These often come with complete living accommodations, so they sacrifice speed over their sportier counterparts. They can average between 9 and 10 knots, depending on the conditions. The top speed is typically around 15 knots.
The Gunboat 62 is a true high-speed catamaran capable of sailing at 20 knots (37 km/h or 23 mph) over true wind speeds and known to notch up speeds of 36+ knots (66.7+ km/h or 41.45 mph) on a surf. The initial 3 Gunboat 62 boats featured epoxy, E-glass, and carbon fiber construction, but the fourth vessel was all carbon, sported a taller rig ...
Onboard sailing footage of the SIG45. The video shows how fast and smooth the boat is. Thanks to her intuitive deck layout and large rudders, she is very eas...
August 30, 2022. Catamarans are known for their speed, and some vessels are fast enough to break world sailing speed records. Catamarans can go between 15 and 30 knots, with the fastest achieving speeds well in excess of 60 knots. Sailing catamarans are sometimes twice as fast as monohulls and cut through the water with greater efficiency.
This is commissioning, and it is the last stage of the build. Test the boat as rigorously as you can before you leave the proximity of the yard. Complete a couple of substantial offshore passages ...
Displacement: 9,390kg 20,701lb. Engines: 2x beta 30 + 2x 10kW hybrid drives. Base price SC: US$1,325,000 ex VAT. Builder : www.hhcatamarans.com. Disruptive, innovative, and contemporary in style ...
A winning balance, it turns out, with the Balance 482 securing its position as the Best Performance Cruiser for 2022. More: balance catamarans, Boat of the Year, Boat of the Year 2022, catamaran, Kinetic Catamarans, print 2022 jan, Sailboats, seawind catamarans. With a powerful, versatile sail plan—as well as light, solid construction and go ...
The crew wrote a detailed report of the experience and the boat's performance. CONDOR exceeded 30 knots occasionally, but average speeds were between 14 and 17 knots. Their best 24 hours saw 328 nm (an average speed of 13.7 knots). The company motto says it all. "Life is too short to sail a slow boat.".
Choosing a catamaran offers increased speed at the expense of reduced load per unit of cost. Howard and Doane describe the following tradeoffs between cruising monohulls and catamarans: [37] A long-distance, offshore cruising monohull may be as short as 30 feet (9.1 m) for a given crew complement and supporting supplies, whereas a cruising ...
The Lagoon 450 came in at 141 versus the FP Helia 44 at 144. Interestingly the Leopard 45 came in with better numbers than the Lagoon and the FP as follows: Bruce number - 1.25; Base Speed 10.65; KSP 7.68 and TR 122. The numbers for Antares PDQ44 are very similar to the Helia 44 and Lagoon 450.
Catamarans aka Tunnel Boats; Offshore V bottoms and catamarans between 35 and 50 feet are the most popular because they are seaworthy. Let's take a deeper look at both of these types of offshore powerboats. Offshore V-Bottom Monohull Speed Boats. The offshore monohull V-bottom is still the quintessential high-performance powerboat.
Boat of the Week: Meet the Lightning-Fast Electric Catamaran That Just Shattered a Speed Record. More important than the 109-mph record was an electric boat streaking by thousands of fans. It gave ...
The Fastest Ferry. The Franciso ferry remains the fastest ferry, built by Incat: HSC Francisco is a High-Speed Catamaran built by Incat in Hobart, Tasmania. Powered by liquefied natural gas, she is currently the fastest passenger ship in service, reaching a speed of 58 knots (107 km/h; 67 mph). The propulsion is by two GE LM2500 water jets.
For example, let's say you wanted to compare 38-foot monohulls to 38-foot catamarans. The speed of a monohull is limited by waterline length, which means you'd have to look at a hull that is significantly more than 38 feet in most cases. On the other hand, the catamaran is known for long swim platforms on inverse transoms and plumb bows ...
However, the power catamaran is a relatively modern innovation that marries the traditional twin-hull design with powerful engines, offering a unique blend of speed, stability, and space. Distinguishing Design: Power Catamarans are characterized by their twin hulls, which significantly reduce the drag, thus enhancing speed and fuel efficiency.
Editor's note: "MTI At 25" is a new weekly series on speedonthewater.com celebrating the company's 25th anniversary. A new installment will go live every Wednesday on speedonthewater.com through the end of the year. Few if any high-performance theme-boats have stood the test of time better than Speed Racer, a 44-foot MTI catamaran built ...
The speed a catamaran can go is entirely dependent upon the hull design, weight of the vessel, the strength of propulsion (be it wind or powered) and so on. The general rule is that in terms of sailing cats vs monohull sailboats, a cat of equal length can typically go faster than a sailboat.
The most important benefit of the speed of a multihull is the ability to outrun bad weather. Meaning that you're able to average 9-10 knots on a catamaran rather than 6-7 knots on a monohull. Subsequently, this will give you more options in your strategy to avoid bad weather. In general, sailing catamarans typically average about 10 knots.
How to use the Catamaran Hulls Speed Table. Choose your length on waterline in the left-most column, either in feet or meter. Continue reading to your right and stop either at "Displacement hulls speed" or continue to "10,20, or 30%", depending on your estimated hull efficiency. This will be your calculated maximum hull speed for a semi ...
How to maintain speed: 1 Sail at higher angles to build up apparent wind speed (AWS) and boat speed. 2 Soak downwind as the apparent wind angle (AWA) surges forward with the acceleration. 3 Drive ...
The red twin-hull catamaran in the images and video above is Safehaven's new T-2000 Voyager, a 20-m (66-ft), long-range, high-performance, semi-wave piercing explorer boat capable of speeds over ...
The calculations for a catamaran are more complicated. The formula for catamaran hull speed is 1.34*(wetted length)1/2; however, this drag formula is generally not the limiting factor for catamaran hull speed. This is because boats with waterline length to beam ratios greater than 8:1 are not limited by hydrodynamic drag factors, whereas smaller boats need to plane to do so (planing requires ...
Before the first 15 runs were done during the first day of the 36th Lake of the Ozarks Shootout in Sunrise Beach, Mo., the two fastest catamaran and V-bottom speeds were laid down on the event's three-quarter-mile course this morning. Of course, the nine-time-defending overall Top Gun champion American Ethanol team was one of those boats—the other was last year's Top Gun V-bottom ...
Vision Marines set a new electric speed record, running an S2 catamaran (at) 109 miles per hour, and the 51-foot factory billet Outer Limits smashed the V-Bottom record with a 184 mile-per-hour run.