Please select your home edition
Edition
Fever-Tree 728x90

The 'riv-olution' that made the 5000SY faster, lighter, quieter

by Mark Rothfield on 21 Jun 2011
The 5000SY hull runs higher and drier with its propulsion boost Riviera Marine
In its former guise as the Riviera 4700, it had a top speed of 28 knots with 575hp Caterpillar C9 engines and shafts. Now renamed the 5000 and sporting Cummins QSC 600s driving Zeus pods, it achieves 33 knots.

Mid-range cruise figures are significantly better again, while fuel economy is enhanced by 12 per cent.

A few years ago the 4700 was deemed good enough to win the Australian Boat of the Year title and fortunately it was a relatively easy conversion candidate, for it had existing hull tunnels and sufficient cockpit floor height to fit the drives underneath.

Riv’s designers chose Zeus over Volvo IPS because the pods are a little more adaptable. There are other integrated attributes, like automatic trim, autopilot and a GPS-inspired 'Skyhook' system that holds the vessel’s position.

The 4700 was already 54 feet (16.7 metres) long once the platform and sprit were factored in, and actual hull length remains 50’9', so it really just brings parity between the dimensions and model designation.

Moving the motors aft demanded some juggling of fuel tanks and bulkheads to balance the weight distribution. In a bid to lighten the displacement, foam-cored timber veneer was used for drawers and cupboard carcasses, reducing weight without compromising the aesthetic appeal of the cherry, teak or beech facia.

The hull now rests appreciably higher in the water, and because the pods provide direct push the bow lifts a little higher. The ride is drier, especially at displacement speeds – the old 4700 tended to be nose heavy.


At the opposite end, the tender garage was a must-keep feature, and the designers managed to include room for a 3.1m Zodiac in between the Zeus legs. The lid opens electrically and the hydraulic boarding platform lowers about 450mm, so it’s a very easy launch and retrieval process.


There’s an appetite for life spent with a riesling, not a reel, in hand, so along with the option of a height-adjustable table that converts to a sunbed there’s now aft-facing seating and a table as well.

The icemaker has been shifted to starboard, and the galley sink and fridges are close enough to service the cockpit. Amtico flooring in the saloon can stand up to wet feet.

It’s the mid-cabin that has gained most from having pods. Where previously there were only double bunks, a lateral double berth now occupies the former machinery room. It also has a single berth.


The forward cabin’s island double berth runs more than two metres, so taller people can have a comfortable night’s sleep. It also has a spacious ensuite with separate shower stall.

To starboard is the third cabin housing bunk beds, although there’s the option of a foyer with leather lounge.

Now that there’s no engines underfoot the saloon is a noticeably quieter place. At slower speeds the engines emit a faint whir reminiscent of a passenger jet … manoeuvrability, meanwhile, is almost like that of a jetboat.

Compared to the conventional 4700 the performance almost defies imagination. There’s no planing transition, just smooth acceleration.

At full stick into a 1.5-metre sea the ride softness and noise suppression were apparent. To chew only 50 litres per side at 16 knots is pretty darn good, while to use 180 litres total at 28 knots is exceptional for a 50-footer.

The finish and fitout remain ever sophisticated.

For more information phone Riviera Marine in (07) 5502 Riviera Marine website

Protector - 660 x 82Insun - AC ProgramNaiad

Related Articles

New addition to North Sail for Volvo Ocean 65 racing machines
Their sails have powered eight out of nine Volvo Ocean Race winners since 1989-90, with Steinlager 2. Instead of assembling cloth panels into a particular sail shape, the Volvo Ocean Race sails are composites. This means that 3Di material 'tapes' are laid in a specific arrangement, offering stable structure to the sail where it is needed most.
Posted on 24 Apr
Crewsaver appointed as Official Safety Provider to 35th America’s Cup
Crewsaver has announced today that it has been selected to be the Official Safety Provider to the 35th America’s Cup Crewsaver has announced today, 21st April 2017, that it has been selected to be the Official Safety Provider to the 35th America’s Cup, which will take place in Bermuda from 26th May to 27th June 2017.
Posted on 22 Apr
Marine Resources expands Boatbuilding Team with two key appointments
Marine Resources have recently expanded their in-house boatbuilding team, with the addition of two new key members. Leading leisure marine industry and luxury yacht recruitment specialists Marine Resources have recently expanded their in-house boatbuilding team, with the addition of two new key members.
Posted on 16 Mar
Southern Spars takes to the air with new composite engineering project
One of the challenges for companies who have had their roots in the marine industry is diversification beyond that field One of the challenges for companies who have had their roots in the marine industry is diversification beyond that field. Moving into the composites engineering for non-marine projects is becoming a more common occurrence as clients realise the opportunities from utilising the expertise of composite boat and spar builders.
Posted on 8 Mar
New Xperformance - Optimising the cruiser/racer range from X-Yachts
X-Yachts have built a wide range of 'Cruiser/Racers' as well as dedicated racing yachts which have won many Intl titles Since the company was founded back in 1979, X-Yachts have built a wide range of 'Cruiser/Racers' as well as dedicated racing yachts which have won many famous International titles, and of course One Design Class yachts such as X-79 and X-99
Posted on 14 Feb
World Sailing unites Kiteboarding governing bodies
World Sailing has today signed a landmark agreement with the IKA and the GKA to unite the kiteboarding community World Sailing has today signed a landmark agreement with the International Kiteboarding Association (IKA) and the Global Kitesports Association (GKA) to unite the kiteboarding community and provide clarity of kiteboarding's governance structure.
Posted on 13 Feb
On board interview with Lisa Blair - solo Antartica circumnavigation
So far, Lisa is tracking very well in her attempt to become the first woman to sail solo around Antartica. So far, Lisa is tracking very well in her attempt to become the first woman to sail solo around Antartica. After the setbacks of a delayed departure due to gremlins in the electronics, we are delighted to have these answers from her on board. She is well and enjoying her time. Climate Action Now, her Hick 50, left Albany in Western Australia on January 22, 2017.
Posted on 8 Feb
The price of legacy
Malcolm Page OAM, two-time Olympic Gold Medallist, became the Chief of Olympic Sailing for the USA on January 1 Malcolm Page OAM, two-time Olympic Gold Medallist (470) with Nathan Wilmot in 2008 and Mat Belcher in 2012, became the Chief of Olympic Sailing for the USA on January 1 this year. In and of itself it is hardly the freshest news, and well and truly yesterday’s fish wrapper. It was also a wise choice on behalf of Team USA, for he has succeeded in both the physical and commercial arms of our sport.
Posted on 5 Feb
Zhik becomes Official Clothing Partner to the Extreme Sailing Series
Extreme Sailing Series™ has established an exciting new partnership with the high-performance clothing brand, Zhik. As it enters the 2017 season, the Extreme Sailing Series™ has established an exciting new partnership with the high-performance clothing brand, Zhik.
Posted on 2 Feb
World Sailing headquarters to relocate to London
World Sailing's headquarters will relocate from Southampton to central London, UK in late summer 2017. World Sailing's headquarters will relocate from Southampton to central London, UK in late summer 2017. The selection of London as the new home for the International Federation comes after an extensive evaluation process of possible locations undertaken since the election of a new President and Board of Directors in November 2016.
Posted on 1 Feb