John Shuttleworh Yacht Design.

Home

Superyacht Adastra

Adastra Article

Articles

Designs

Technical Q&A's

Stock designs

What's New

Race results

Biography

Owner comments

Contact

Follow Shuttleworth Designs on Facebook Follow Shuttleworth Designs on Twitter

Press Release 28th September 2004.

The all new Eleri 1400

Design commissioned by 'Boiling Frog' from John Shuttleworth Yacht Designs Ltd.

View 3D animated rotating image...Eleri animation WMV 900 Kb
Eleri Images Eleri images

The brief was for a comfortable ocean cruiser for a sizeable crew, and for an exciting and spacious boat working closer to shore, for skippered charter and taking groups out on shorter trips. John Shuttleworth has incorporated many new ideas into the design.

For those of us who can never weigh up the pros and cons of a bridgedeck saloon vs. an open bridgedeck design, the Eleri1400 offers the best of both worlds; the low windage and performance advantage of the latter, while the fixed cuddies here are big enough for crew to sit out of the weather and with a panoramic view as in a bridgedeck saloon.

Below John Shuttleworth explains the genesis of the design from the Shuttle 40 and the more recent 'Dogstar 50' racing design. Following on, Gary Pearce describes his experience of sailing his Shuttle 40 'Zazen' half way round the world. As all multihull sailors know, a performance boat allows one to sail well within one's limits, in the comfort zone, and still make fast passages. In particular the sea-keeping qualities of Shuttleworth's flared hulls preserve the good temper and therefore alertness of the crew, while access to the mast from the cockpit of the open bridgedeck also significantly contributes to safety - whether racing or cruising.

John Shuttleworth writes: "The Eleri1400 represents more than 20 years of development of the open bridgedeck concept. This modern catamaran is designed for serious long distance ocean sailing. With this in mind, the yacht has been optimised using proven engineering principles, hydrodynamic tank testing, analysis of the aerodynamic streamlining of the hulls, and thousands of miles of ocean cruising.

In order to produce this design John Shuttleworth has brought together his latest research and many years of long distance cruising experience. Using the results of an in depth analysis of the Dogstar 50 catamaran, where the new lightbulb hull shape was proposed for the first time, he has produced a hull shape that significantly reduces aerodynamic drag and improves windward performance. This boat can be expected to sail to windward at 12 knots in 18 knots of wind, and to reach easily and comfortably at 17+ knots, which is well inside the top speed of 25 knots.

This means that she will be an exciting performer by any standards and there is unlikely to be any other 46 footer afloat that will come near her performance on any point of sail. In addition, she will also be a fine ocean cruiser. Easily driven, she can make safe and fast passages without having to strain the boat or the crew. The accommodation layout draws from the best of Shuttleworth's cruising designs, including feedback from the recent successful voyage from England to Australia, by Gary Pearce with his wife and two 12-year-old children aboard the 40 ft. open bridgedeck catamaran "Zazen"."

Gary Pearce writes: "If I learned one thing on our little trip it's that performance is a lot of different things apart from outright speed. Way back at the beginning of our adventure I was reminded that it's easy to slow a fast boat down but difficult to speed a slow boat up....

In terms of how fast Zazen went then we did not encounter many similarly sized boats I would consider faster, but we actually sailed far more within our limits than a lot of people and always stayed at least a reef ahead of the weather. We always reefed early and were rarely disappointed with our choices in this regard. And the boat still kept going quickly.

It was sea conditions that dictated speed. In most conditions 12-14 knots was just about acceptable in terms of noise and motion. Zazen can do that sort of speed effortlessly in most conditions. That gives you 200 mile plus days without trying, which is a pretty good cruising speed

Where we did really well was in the light stuff. When it gets very light we could sail down to 2 or 3 knots true wind provided it wasn't from dead astern. This keeps you ahead of some fairly large, lush boats and requires no diesel. That's important given that a lot of ocean crossing takes place in light conditions. In the Pacific the passages from Panama to the Marquesas for instance often experience very light winds. And one is limited by weight. Being able to sail in the very light stuff means less diesel to carry means less weight - it?s a virtuous circle. In fact we probably used less than 200 litres of diesel in 16 months and 15,000 NM.

We didn't go faster in the heavy stuff because we needed our sleep, which was hard to get due to noise and motion, and for an 18-day passage you need to really look after the crew. Above 12 knots was too difficult for the crew.

In fact we hardly broke anything. There was zero damage to crew (although they were a bit stressed after the longer passages - 3hrs on 3 hrs off is tough). Access to the mast from the cockpit had a lot to do with that?.

We met a number of people cruising in heavy multihull caravans and they were fairly universally unhappy with the performance of their boats.

Oh, and in port performance was great. Our awning would catch 60 gallons in a couple of minutes - we were always the ´party pontoon´, which was nice, especially for the kids.

Oh top speed? We often exceeded 20knots on a surf but you cant be pushing that hard in the middle of an ocean with your wife and kids unless you are a psychopath. "

This design is exclusive to:

Boiling Frog

is a registered trademark of

MILFORD HAVEN MULTIHULLS LTD
Unit 5
London Road Industrial Estate
Pembroke Dock
Pembrokeshire
SA72 4RZ
tele: 0(+44) 1646 621 199
fax: 0(+44) 1646 689 002
web: www.boilingfrog.co.uk
admin@boilingfrog.co.uk