Powerboat-World.com
 
 
News Home Video Gallery Newsletters Features FishingBoating Photo Gallery Sail-World Australia Australian Cruising
MarineBusiness-World

 

Sail-World.com : Pershing Performers

Pershing Performers

'Pershing Performers'    Ocean Magazine ©    Click Here to view large photo

OCEAN Magazine's Anthony Twibill reminds us that the ultimate test of high speed marine propulsion is not as simple as just the engines on board but what delivers that power.

' Step aboard the stunning silver Pershing 115 superyacht, or for that matter the equally alluring Pershing 90 you are entering a very special realm of style, luxury, and exotic design afloat. You are also about to experience the fastest leather lounges and luxurious Italian furnishings ever to blast their way across the Mediterranean at speeds of up to 55 knots.'


High technology marine propulsion systems such as waterjets and surface piercing drives have applications across many military and commercial marine operations with high speed requirements. But nowhere is the dedication to speed on the water more beautifully executed than in high performance, luxury leisure boats such as the Pershing.

Wind in your hair – the style-setting flybridge of the 115 -  Ocean Magazine?nid=39473 ©   Click Here to view large photo
The flybridge helm on the 115 feature highly reclined leather helm chairs and a perspex instrument protector elevates to become a 50 knot windshield -  Ocean Magazine?nid=39473 ©   Click Here to view large photo

The 115 saloon – high performance with luxury -  Ocean Magazine?nid=39473 ©   Click Here to view large photo

OCEAN was invited on board Pershing’s top-of-the-line luxury vessels, the 115 and 90, for high speed sea trials to compare these thoroughbreds and their high tech yet totally different drives. Both (magnificent) vessels took to sea off Cannes and played a high speed game of cat and mouse, throwing their massive silver hulls through the tightest turns, carving massive wakes of white water and sky high rooster tails, then racing each other in exhilarating straight line dashes side by side at close to 50 knots. Unlimited excitement delivered by remarkably different propulsion systems.

The Pershing 90 can propel its 66 tonnes (unladen) to 44 knots, driven by twin MTU 2435 HP turbocharged common rail diesels coupled to Twin Disc Arneson surface piercing drives. Arneson drives feature large diameter, fully trimmable props which are designed to achieve maximum speeds by piercing the water’s surface behind the transom of the vessel. The Arneson drives are perhaps as well known for their characteristic rooster tail as they are for their high speed performance characteristics and the extraordinary directional stability, or traction, they command in a turn as the trimmable drives angle the propellors in the precise direction of motion.

A conventional underwater propeller system on standard shafts can allow speeds of about 35 knots or, in a few cases, up to 40 knots. But to achieve speeds in the realm of 50, 60 knots or greater requires propulsion alternatives such as surface piercing propellers on drives that can be trimmed both horizontally for steering and vertically to allow the ideal thrust angle for varying load and sea conditions.

This system allows for the propeller submergence to better match the engine power output, delivering more thrust. Together with larger propellers designed for surface operations, Arneson drives provide speed increase and fuel efficiency savings of up to 30 percent over conventional set-ups. The Arneson drives behave like a cross between an outboard and a conventional shaft. But they eliminate some of the issues of typical shaft installations such as blade tip clearance from the hull (reducing the optimal propeller size), maximum vessel draft, shaft angle and engine location. These issues can cause propeller cavitation and excessive vibration due to low tip clearances, or a steep shaft angle inducing loss of efficiency and consequent parasitic drag. All become much greater as speed increases.

Hence, Arneson drives are regarded as one of the most efficient marine propulsion systems available, not just a high speed propulsion technology. Twin Disc Inc. is the international manufacturer and distributor of the drives and offers them in nine different model sizes for engines up to 10,000 HP.

The waterjet is another proven, high speed propulsion technology and is the system chosen for the largest Pershing yet designed. The Pershing 115 is an even more extraordinary package and almost defies belief. Its revolutionary and seductive design, ultimate performance and luxury, places it at the very top of its class in the elite world of superyachts.

Arneson drives gives the 90 tremendous turning agility -  Ocean Magazine?nid=39473 ©   Click Here to view large photo


The large surface piercing propellers -  Ocean Magazine?nid=39473 ©   Click Here to view large photo
The luxurious and contemporary interior -  Ocean Magazine?nid=39473 ©   Click Here to view large photo


The 115 may only be 25 linear feet longer than its stablemate, but the volume and performance of the boat is in an entirely different class. The big Pershing displaces 114 tonnes unladen (almost twice the 90) and up to 133 tonnes when loaded. It is no lightweight and you might imagine with those extra staterooms, luxury appointments and consequent kilos, that the legendary Pershing performance could be compromised? Never! After all, this is the flagship.

The 115 has a top speed of 55 knots on its high lift Pershing hull, designed to run Kamewa Rolls Royce hydrojets as propulsion units, powered by twin MTU diesels totalling 7,400 HP. Plus it features a centreline mounted 5,100 HP Textron Lycoming turbine (jet engine) that boosts speed to 55 knots from its ‘nominal’ 42 knot top speed if only the diesels are engaged.

To achieve such speeds a 115 foot vessel has high power requirements and 12,500 HP total installed power with the gas turbine engaged is quite sufficient. Converting all that power to speed on the 115 is theKamewa waterjet system from Rolls Royce. Used for many years on larger, high speed superyachts and military vessels, the system principally consists of a water inlet duct, an engine driven pump with an outlet nozzle shaping the jet and steering and reversing gear. Steering is accomplished by a nozzle which deflects the waterjet thrust in the required direction. A reversing bucket in the steering nozzle deflects thrust forward when reverse is required.

Waterjets are relatively smooth and vibration-free when compared to conventional shaft and propeller arrangements. Waterjets expel tonnes of water rapidly aft (or in the direction of the nozzle) providing forward velocity. As there are no propellors or rudders, or even shafts, there is very little appendage drag from exposed rudders, shafts, struts or even propellers themselves which would otherwise contribute to parasitic drag at high speed.

KAMEWA waterjet drives achieve a 55 knot top speed -  Ocean Magazine?nid=39473 ©   Click Here to view large photo
Schematics of the 115’s triple engine installation and drives -  Ocean Magazine?nid=39473 ©   Click Here to view large photo

Waterjets provide smooth acceleration and cruise performance and the ducted steering nozzles provide good directional control at speed. As there are no propellers in the water, there is less grip on the water and during high speed turns the stern of a waterjetpropelled vessel tends to slip more than a conventionally propelled vessel. But for smooth, low-vibration, high-speed excitement, the waterjet propulsion is in a class of its own.

The Pershing 90, on the other hand, adopts an entirely different propulsion model to achieve its equally exciting performance. Which is better? Neither really; they are simply different and suit the individual requirements of each vessel.

The Pershing 90 with its Arneson drives is best compared to a high performance Italian sports car. The pure exhilaration of storming across the sea at 44 knots, throwing a 50 foot rooster tail into the sky from the trimmed up props, then tossing the 66 tonne hull through hairpin turns casting aside tonnes of white water from the Arnesons’ relentless grip on the water is unequalled for pure excitement.

The Pershing 115 Turbine is comparable to the ultimate Grand Tourer. It is awe-inspiring, luxuriously appointed, supremely powerful and effortlessly smooth and fast.

Pershing technicians installing the “booster” 5,100 HP gas turbine of the 115. -  Ocean Magazine?nid=39473 ©   Click Here to view large photo
With the gas turbine booster engaged and the twin MTU diesels at maximum rpm, there is nothing of its displacement class that can match its speed and sea-keeping. Ultimately, the waterjets are a more subtle form of high speed propulsion than the extreme performance of the Arneson drives which are unmatched in turns.

But if a decision had to be made based on th




by Anthony Twibill OCEAN Magazine

  

Click on the FB Like link to post this story to your FB wall

http://www.powerboat-world.com/index.cfm?nid=39473

11:35 PM Mon 26 Nov 2007 GMT






Click here for printer friendly version
Click here to send us feedback or comments about this story.


Related News Stories:

24 Nov 2008  Cruising Australia’s last frontier -West Australia
28 Mar 2008  What a Triumph Rocket and Pershing have in common
18 Mar 2008  Pershing's 72 reviewed by OCEAN Magazine
26 Feb 2008  Ferretti: 40 Years A Leader
18 Feb 2008  Pershing 72 wins European Powerboat of Year 2008
13 Feb 2008  Ferretti Yachts on Show Sanctuary Cove Boat Show
10 Feb 2008  Serious First Aid Kits for Offshore Adventures
31 Jan 2008  Pershing 72 takes European Power boat of the year
28 Dec 2007  Ocean Safari in style
03 Nov 2007  The Great Southern Route
MORE STORIES ...

Power Boat News

Sediments associated with dredging and flood plumes could have a significant impact on fish populations by extending the time required for the development of their larvae, according to Australian researchers. 'Sediment concentrations at levels found in plumes from dredging or in floods cause a significant delay in the development of clownfish larvae,' says study lead author, Dr Amelia Wenger. ... [more]  

The Tauranga Boat Expo has proven a popular attraction for marine enthusiasts outside the main centres. This year, Lancer has chosen to join the show as part of their tour introducing the market to Sea Blade as well as their other exciting products. ... [more]  

Safer Boating Week ended Friday, but with the start of Labour weekend here, there’s no better time to check your boat is safe and prepared to get out on the water over summer. Coinciding with Labour Weekend, new Auckland Council Navigation bylaws also come into effect from Saturday. ... [more]  

NMMA loses E15 fuel U.S. Court of Appeals Decision by National Marine Manufacturers Association
While the battle in the U.S. over E15 might seem a local issue, its plainly has world-wide flow though for the recreationa marine market.The Engine Products Group, a coalition of organizations that includes NMMA, sought to block the EPA decision. ... [more]  

This partnership brings together two truly functional and enthusiastic events for what will become Australia’s premiere 4x4 and marine super expo. But it doesn’t end there. The ethos behind Explore Australia Expo is to substantially grow the consumer pool by enticing and engaging not only the converted enthusiast but also newcomers and those within parallel or fringe categories. ... [more]  

The organisers of METS have revealed that 45 products have been nominated to go forward for final judging by the jury of the prestigious Design Award METS (DAME) 2014 competition. The products have been selected from a total of 116 entries from 23 nationalities all over the world. ... [more]  

The Barcelona International Boat Show closes its doors in Port Vell this afternoon and confirms a trend towards recovery in the sector. Over the course of five days, the show which presented 120 new products and 650 vessels recorded a large turnover and number of visitors, who were able to take an active part in more than 100 programmed activities. ... [more]  

The famous Henri Lloyd Summer Sample Sale is on again kicking off Friday 24th October 2014 at the Henri Lloyd showroom in Crows Nest, Sydney! Huge range of samples and discontinued lines from Henri Lloyd's marine, footwear and lifestyle collections for men and women. Discounts of up to 80% off original RRP! ... [more]  

There is still time to purchase a copy of the new RYA Advanced Powerboat Handbook by Paul Glatzel and be in with a chance of winning an RYA Advanced Powerboat course courtesy of the Paul’s RYA Training Centre, Powerboat Training UK. ... [more]  

PredictWind have made significant improvements to the swell forecasting models and added new locations. Integrating the new 50km global wind forecast with ocean current data has created the most advanced swell modelling available online. By combining PredictWind forecast data with ocean current data, the effect of the wind on swells can be accounted for ... [more]  

Imagine finishing the Coastal Classic and relaxing in your own waterfront home at Opua with your boat tugging gently on a deep-water mooring off the lawn. Built to an architect design in 2000, this north-facing waterfront Opua property is a short walk to the marina and boatyard. It is going to auction on November 22. View this Labour Weekend after the Coastal Classic. ... [more]  

The event has historically been conducted at the Brisbane Showgrounds, however as a result of the significant construction and redevelopment of that venue, it has presented many operational difficulties in continuing todeliver a high quality event expected by exhibitors andvisitors to an industry boating showcase. ... [more]  

MMC has presented PaddleNSW with 50 new generation lifejackets so its coaches and instructors can help role model behaviour to further encourage everyone on the water to wear lifejackets. 'The lifejackets will be used to kit out PaddleNSW’s network of training staff and volunteers in key locations across NSW,' said MMC General Manager Howard Glenn. ... [more]  

The Australian marine industry is singing the praises of the fourth annual Gold Coast International Marine Expo, reporting strong sales and even greater prospects in the lead-up to summer. 'Based on exhibitor feedback, the total sales at the Expo alone would certainly be in the order of tens of millions of dollars,' she said. ... [more]  

Volunteer Marine Rescue Southport, at the top of the Gold Coast, now has more of both after fitting twin 300 hp Mercury Verado outboards onto it largest vessel, a 9.5 metre Noosa Cat 3100. ... [more]  

2014 Gold Coast International Marine Expo - Marine Syndication, a division of Marine Auctions, was in full swing at the Gold Coast International Marine Expo that took place at the Gold Coast Marine Precinct in Coomera. ... [more]  

UIM Class 1 Grand Prix of Italy 2014 - Sunday, Terracina (Italy): Luca Fendi and Giovanni Carpitella produced a breath taking performance to take their first win together in C1 at the team’s home Grand Prix, with Aquasport’s Daniel Cramphorn and Nico Huybens producing a totally dominant performance to win in V1. ... [more]  

Watchstanders at Coast Guard Sector Hampton Roads received a report from a concerned friend at 10:30 p.m., Friday stating the two men had departed on a planned 20-minute trip, but had been gone for approximately two hours. The reporting source also stated that the men did not have radios or cell phones aboard. ... [more]  

More than 13,000 visitors flocked to Scotland’s Boat Show 2014 (SBS14) at Kip Marina, Inverclyde last weekend as the boating world showed off everything from a £500 dinghy to an £800,000 Sunseeker luxury powerboat. SBS14 is the largest boat show in Scotland and the third largest in the UK and, with over £15m worth of boats on display, there was something for every budget. ... [more]  

Victory and Bernico-New Star took race 1 honours in a dramatic and incident-filled first race at the Grand Prix of Italy, which was stopped after a first corner spin-out by Tommy One after the start lap, forcing officials to bring out the red flag. ... [more]  

2014 Gold Coast International Marine Expo - The awe-inspiring aerial antics of the Extreme High Diving show at this weekend’s 2014 Gold Coast International Marine Expo have a whole new flavour, with McDonald’s signing up as an event partner. ... [more]  

Alongside the line-up yachts and boats by international and local brands, visitors to this year’s Yacht CN will have a chance to enjoy the exciting Moto Surf China Race, passionate samba dances, bikini model shows, international music band performances, and popular international DJ music on-site. ... [more]  

Boyan Slat is a 20-year-old on a mission - to rid the planet's oceans of floating plastic. He has dedicated his teenage years to finding a way of collecting it. But can the system really work - and is there any point when so much new plastic waste is still flowing into the sea every day? ... [more]  

Discover Boating Week starts tomorrow by Boating Industry Association
Discover Boating Week is a celebration of the recreational boating lifestyle and the joys and fun that come with spending quality time on the water. Whether you're a fisherman, paddler or sailor, there is something for everyone. Over 40 events will be taking place across the state from October 18 - 25 and the best part is, they all absolutely free! ... [more]  

Great start to another massive Gold Coast International Marine Expo by Emma Milne/Gold Coast International Marine Expo
The Gold Coast International Marine Expo – open all weekend – is a marquee event for the marine industry and has delivered on its promise of 'all things aquatic – from super yachts and jet skis to kayaks and fishing equipment … and everything in between'. ... [more]  

The 2014 Fort Lauderdale Boat Show is fast approaching and I want to know if you’re planning to attend. If you are, I'd like to let you know about some of our must-see clients. ... [more]  

Boaters are reminded to keep clear of a section of Sydney Harbour on Sunday 26 October for the safe staging of The Australian Boat Race. ... [more]  

The first ever Safer Boating Week (17-24 October) puts the spotlight firmly on ensuring boaties walk the safety talk when they’re out on the water this summer, Maritime New Zealand (MNZ) says. New research, commissioned by MNZ, shows the majority of New Zealanders have good safety attitudes but these don’t always translate into safe behaviour on the water. ... [more]  

2014 Gold Coast International Marine Expo - With less than 24 hours until the start of the three-day 2014 Gold Coast International Marine Expo, the event site is a hive of activity as exhibitors prepare and polish their displays to help you make this summer one to remember. ... [more]  

Reggie Fountain--a legend, a leader and a brand that still defines one of the most historic chapters of Powerboating history. The compelling story of offshore racer and boat builder Reggie Fountain--the man who revolutionized offshore racing with innovations in boat building that still influence the sport today--is told by American Performance Media in its new film documentary, King of Offshore. ... [more]  

Victory and Chaudron top the standings in the UIM C1 and V1 World and European Championships and head-up a 13-strong line-up for the European title decider at this weekend’s Italian Grand Prix in Terracina. ... [more]  

Boats recovery after Sydney storm by Roads and Maritime Services
Roads and Maritime Services Maritime Director Angus Mitchell said Roads and Maritime Services boating safety officers (BSO) had been busy since sunrise in Port Hacking helping with the recovery of more than 10 boats which broke their moorings overnight during stormy conditions. ... [more]  

MMC have donated 300 new generation lifejackets to Rowing NSW so their coaches and instructors can act as ambassadors by wearing them and role modelling behaviour to further encourage everyone on the water to wear lifejackets. ... [more]  

Most boaters start the new boating season safely
Barcelona Int'l Boat Show - 120+ new products and a hundred activities
F1H2O Worlds 2014 - Qatar Team heads to Florida for more F1 testing
Discover Boating Week opens up opportunities to participate
Riviera owners find paradise in one of seven natural wonders
Changed boating conditions for Yarrawonga Multisport Festival
605 Sportsfish named Australia's Greatest Boats 2015 Finalist!
2014 Gold Coast International Marine Expo - Multihulls set to dominate
Update: Stunning finds from ancient Greek Shipwreck
Teams preparing for Key West 2015 season
Search for victims in challenging marine rescue test
Gold Coast International Marine Expo - Boats to behold … and much more
Sail Canada - Keel and Power Programs at AGM
Superior set for METS and enters Waterscape in DAME Awards *Feature
Roads and Maritime Services seeks proposals for vessel suppliers
Ferretti Yachts 550 comes to light
Vicsail - Boat Show Open Day - d'Albora Marina Rushcutters Bay
Benetti launches Veloce 140 in the Fast Displacement series
The future is now at 2014 Gold Coast International Marine Expo
Grand Prix of China - France celebrates treble in Liuzhou
2014 Gold Coast International Marine Expo - Futuristic and fun toys   
Super Boat National Championships - Great conditions for sixth edition   
Genoa International Boat Show 2014 – everything is relative   
GC International Marine Expo: Sirroco RIB + engine up for grabs   
BIA responds to Sydney Marine Park proposal   
TV awareness campaign calls on boaties to be safe on the water   
2014 NSW Discover Boating Week - Set to kick off this year’s summer   
Lifejackets do save lives - Wear yours on board this long weekend   
Recognition for boating community with Maritime Medal Awards   
Sydney Harbour Marine Park would attract Industry compensation claims   
Get set for the Sportjet   
2014 Auckland on the Water Boatshow hailed a huge success   
2014 Gold Coast Int'l Marine Expo: TAFE Marine Training Centre on show   
Dredging of Swansea Channel gets underway   
Barcelona International Boat Show - Ideal platform to launch products   
Have trailer, will travel *Feature   
Auckland On The Water Boat Show: Images from the final day   
British ocean adventuring legend launches round the world record bid   
Auckland On the Water Boat Show: World record mark set on Lancer SUP   
Marine Rescue Forster Tuncurry recognised with Water Safety Week Award   


For this week's complete news stories select    Last 7 Days
   Search All News
For last month's complete news stories select    Last 30 Days
   Archive News







Sail-World.com  


















Switch Default Region to:

Social Media

Asia

Australia

Canada

Europe

New Zealand

United Kingdom


http://www.sail-world.com/event_images/image/Twitter_logo_small.png   http://www.sail-world.com/event_images/image/RSS-Icon.png

United States

Cruising Northern

Cruising Southern

MarineBusiness World

PowerBoat World

FishingBoating World

 

Contact

Commercial

News

Search

Contact Us

Advertisers Information

Submit news/events

Search Stories/Text

Feedback

Advertisers Directory

Newsletter Archive

Photo Gallery

 

Banner Advertising Details

Newsletter Subscribe

Video Gallery

Policies

 

 

 

Privacy Policy

 

 


Cookie Policy

 

 



This site and its contents are © Copyright TetraMedia and/or the original author, photographer etc. All Rights Reserved.  Photographs are copyright by law.  If you wish to use or buy a photograph contact the photographer directly.
XLXL NEW PBW
LocalAds   DE  ES  FR  IT