Superb sailing performance
High performance under engine
The COAST 250 is the first in a new range of contemporary craft from Swallow Yachts that combine first class sailing performance with a range of powerful engine options. Owners can enjoy not only the benefits of sailing in a modern performance yacht, but also the wonderful flexibility of a craft that can motor quickly too. The COAST 250 was nominated for the prestigious 2019 European Yacht Of The Year award.
“There’s no doubt that the COAST’s hull form, combined with her carbon rig, modest weight, efficient keel section and low centre of gravity make her a more-than-competent performer under sail.” – Yachting Monthly
Could this be your Dream Boat?
- A pure sailboat design drawing together the best of modern technology to create a no-compromise sailing machine.
- Motoring at speeds around 15 knots. Having this sort of motoring capability changes everything, from tidal passage planning, staying safe, or simply getting home more quickly.
- Spacious accommodation. She has four full length berths (five if you don’t have the fridge), an enclosed head and a unique space saving galley. Simply put, she has comfort and practicality way beyond her size.
- The COAST 250 is trailerable too. You may only use the trailer for winter storage, but it opens up all of Europe’s finest cruising grounds and with the help of our owner’s association, you can share knowledge about all the best slipways and deals
“the boat is crammed with clever touched and it sails as you’d expect a Swallow Yachts product should – very well” – Sailing Today
|Hull Length:||24' 10" (7.57m)|
|Length Waterline||24' 10" (7.57m)|
|Beam:||8' 4" (2.54m)|
|Lead keel weight:||300kg|
|Draught keel up:||1' 4" (400mm)|
|Draught keel down:||6' 1" (1.85m)|
|Sail Area:||307sqft (28.6sqm)|
|Engine:||9.9hp - 70hp 4 stroke|
|Fuel||Max 3 x 25 litres|
Sailing and Motoring?
The most unique feature of the COAST 250 is the ability to sail really well and motor quickly. Motoring fast and sailing fast have very different requirements but combining the two was a tantalising prospect for the Swallow design team. The appeal of motoring above displacement speed is undeniable, as long as it does not compromise sailing.
“Despite the unforgiving seas, she punched and sliced her way through them with remarkable composure for a 25-footer, up to 4.8 knots showing the GPS against the north-going current.” – Yachting Monthly
Working with the renowned Wolfson Unit at Southampton University, the COAST 250 combines a distinct hull shape with innovative engine selection and placement. Rather than mount on the transom, Swallow have taken a standard outboard engine and moved it forward so it sits where a conventional diesel would be. The largest engine available (70HP) weighs only 120kg, about the same as a diesel 10HP including prop, shaft, exhaust etc. Married with innovative underwater lines, this mid-mounted outboard puts the weight where you want it, retracting fully for minimum drag when sailing.
“She is first and foremost a sailing yacht” – Sailing Today
Range under Power
Using the largest engine the COAST 250 will consume about 20 litres per hour at top speed (around 15 knots). There is room for 3x 25 litre fuel tanks in a draining locker under the cockpit floor, giving a max range at this speed of around 56 nautical miles. At 6 knots fuel consumption drops, resulting in a range of about 90 nautical miles.
Why use an Outboard?
An outboard engine was chosen for many reasons, but chief among them was weight and size (they have far more power for their weight and are more compact, than a diesel). Modern 4 stroke outboards are smooth and reliable, as well as being cheaper to service, and if initial purchase cost is taken into account, often cheaper to run too. The trouble with a large outboard on a sailing boat is that mounted on the stern, it’s exactly where you don’t want the weight, spoiling trim and increasing pitching. It can be made to work using a powerboat hull shape, with a deeply submerged transom to support the weight of the engine. Until now, this has been the approach in craft claiming to sail and motor quickly, but its huge disadvantage is sailing performance. A deep, submerged transom creates a bucket load of drag at sailing speeds, to say nothing of the weight of an engine on the transom.
Move the Outboard, Inboard
Swallow have moved the outboard forward in the boat, just aft of the swing keel, below the companionway. This places the weight more favourably, reduces pitching and ensures a well buried prop. The engine is out of sight of thieves and covered by a soundproof lid that reduces noise at 6 knots to no more than a purr.
There are two options here to suit different owners. A 9.9 HP high thrust outboard engine, as used with such success on our BayCruiser 26, mounted in the central well, with additional sound proofing making up the space the larger engine would usually take. Or for those looking to motor at greater than displacement speeds, a 70HP engine can be specified, mounted in the same place. Whichever engine you choose, it should be virtually silent at displacement speeds, it’s out of sight of thieves, well buried to prevent prop ventilation, and in front of the rudder for ideal control. Normal servicing can be carried out in situ on the boat but if you do need to lift it out, the main boom and main sheet can be attached to the lifting point under the engine cowling and the whole lot lifted out and swung clear.
“I wanted to see how the boat behaved as speeds between displacement and full tilt, so I opened the throttle progressively. At 7.5 knots the bow began to rise slightly and the turbulence to break away from the transom. The interesting change occurred at 8 knots: the bow rose a little further and it felt an inefficient speed, as though the boat were trying to climb over the ‘hump’ that afflicts most planing hulls. At this point it took only the briefest nudge on the button that lowers the tabs to bring about a remarkable transformation. The bow came down, the revs increased and the boat accelerated to 13 knots over the ground against the incoming tide as it was funneled through the mouth of the river. And we hadn’t touched the throttle.” – David Harding, Yachting Monthly
In many ways this is the most important feature but since all our boats can be trailered, it almost goes without saying. She is within the legal width requirement and together with trailer, engine and normal equipment, should weigh around 2000kg. Transporting on a trailer keeps costs down and provides easy winter storage. Of course, it also opens up a world of exciting cruising grounds too.
A 70HP Outboard?
What’s wrong with a normal size engine? Nothing at all, and we do offer a 9.9HP option. Except that we think that once you have experienced the unique advantages of more power, you will see the new possibilities it opens up. Doing 15 knots you can easily reach new sailing grounds or cover large distances when becalmed. Or consider a mooring in the upper reaches of Chichester, Poole or any number of large harbours. With a 2-3 knot ebb tide, and a conventional boat, you might only make 3 knots over the ground. In the COAST 250 you can easily reach the usual 10 knot speed limit and arrive nearly 3 times quicker.
Get in touch
Our customers are always welcome to come and meet the team and to watch the boat building in action. Wherever you are in the world we are always happy to speak to you.