Showing posts with label gts43. Show all posts
Showing posts with label gts43. Show all posts

Sunday, April 10, 2016

ClubSwan 50 Review

For roughly the last fifty years Nautors Swan yachts have represented the epitome of quality and performance. Their yachts tended to be a bit heavy for my taste but always embodied classic elegance of design, very respectable performance and very high quality construction. In 1998 the company was acquired by an investor group led by Leonardo Ferragamo, a director of the fashion empire of the same name. I think that since he came aboard, the Swan brand has reached new levels of style and elegance.

In the early years Swan relied on the firm of Sparkman and Stephens to produce their designs. Later they turned to German Frers for the majority of their boats. It was a good choice since Frers had been with the S&S firm at the time they were engaged with Swan, and was arguably their best designer.

Frers left S&S in 1968, eventually returning to his native Argentina where he took over the family design firm while Swan engaged Ron Holland to design their boats.  In the 1980s Frers reconnected with Swan and since then has produced a long string of beautiful designs for them, including the 45 and  42 one-design racer/cruisers and the elegant Swan Regatta 60. So it is somewhat of a surprise to me that Swan turned to Juan Kouyoumdjian for their newest design.

Interestingly, Juan K, as he is known, is also an Argentine, although his design firm is located in Valencia, Spain. I had heard a few months ago that he was working on a new design for the company and expected it to be an incremental development of their current design trend of lighter racer cruisers with plumb bows and elegant appointments. I was wrong.

Swan unveiled the new design a couple of months ago with a series of drawings and renderings which I downloaded and include below. As you can see, the new boat is a significant, one might even say radical, departure from what we think of as the Swan Style. The ClubSwan 50 is intended to be a high performance one-design racer with accommodations for distance races and, as Swan calls it, sports cruises.

Lets start with the hull. The first thing that catches the eye is the reversed bow and sheer. Students of yacht design know that reversed bows have been used on racing catamarans for the last fifteen years or so. The purpose of this shape is to maintain maximum waterline length while reducing the weight and windage of the bows. This makes a lot of sense on boats that frequently fly the weather hull or, as in the case of the AC72 cats, simply fly.  This shape is harder to justify on a ballasted monohull, especially when it is fitted with a large bowsprit that pretty much negates any weight or windage savings. Regardless of any performance benefit, the reversed bow profile is certainly a strong aesthetic statement that is complimented by the reversed sheer. The reversed sheer enables the designer to keep the freeboard at the bow and stern minimal yet still provide enough headroom amidships with a cabin trunk of minimal proportions. This is a design feature more often found on smaller boats than the CS50. There is a pronounced chine aft that appears to run nearly to the bow in the renderings. Bear in mind that we are dealing with renderings and not photos of an actual boat, so the finished product may be different from what we see here. Notice the flare in the aft topsides. I dont know what hydrodynamic principle would require this shape but, again, it makes a strong aesthetic statement.



New Club Swan 50. A bold step forward for Nautor.
The fairbody line of the the CS50 shows a very shallow hull with the knuckle of the bow just at the waterline, while the stern is lifted slightly above it. In the stern view, notice the arc-like shape of the hull at the transom. I think this boat will surf easily and leave a very clean wake when driving upwind. Im not a huge fan of twin rudders unless they make a meaningful contribution to the performance of the boat. In the CS50, they are relatively small so that when heeled, the weather rudder will usually be out of the water, so at least it wont be much of a drag most of the time.  Still, if I were to order a CS50 for myself, Id ask them to show me the hydrodynamic data that prove twins are better than a single centerline rudder. The keel is exactly what we would expect on a boat of this type, a deep steel fin with a lead torpedo shaped bulb.

Here are some numbers:

LOA:  50.00
LWL:  45.93
BMAX;  13.78
Draft (deep): 10.50
Draft (shoal): 7.22
Disp: 20,503 lb
Ballast: 7,496 lb
Sail Area (upwind): 1,527 sf
Sail Area  (downwind): 3,185 sf
D/L: 94.47
SA/D: 32.74

With a SA/D of nearly 33 and a D/L of 94, there is no doubt that the CS50 will be as fast as it looks. I am intrigued by the rig proportions. Notice that the three-spreader carbon mast is located significantly further aft than we usually see on high performance boats. I dont have any rig numbers but the "J" dimension is clearly longer than "E", which means that the jibs on this boat will be quite large relative to the mainsail. In the sailplan below, the boom doesnt quite reach the transom and the traveler appears to be at least a couple of feet forward of it, but in other drawings and in the literature, the traveler has been located all the way aft. Either way, this is a powerful rig that will take a full crew to get the most out of. On the other hand, the brochure states that when its just the husband and wife aboard, theyll hoist the main to the second reef and unroll just the small jib, which should provide adequate performance for a leisurely daysail. Of course all the winches will be electric so the hoisting and trimming will all be done by pushbutton. With the main hoisted to the second reef the square top of it will pass inside the twin running backstays so you wont have to ask the wife to scamper over and tend them when you tack. Sounds pretty civilized to me.





Interesting proportions of the CS50 rig.



The deck of the CS50 leans more toward racing than cruising. There are minimal coamings from the companionway to the aft end of the seats.Aside from that, I dont see any concessions to cruising comfort on this deck except for the short cockpit seats.  The transverse jib tracks are located on the cabin top and the chainplates are all the way out at the sheer, leaving the decks uncluttered. There doesnt appear to be a provision for leading jib sheets to the cockpit winches so I assume they are led to the cabintop winches. I was aboard a  new Swan 60 a few months ago and on that boat many functions such as vang, outhaul, traveler controls, etc. were managed by pushbutton. Indeed, the panel of buttons at the helms was extensive. This kind of arrangement might free up those cabintop winches for the jib sheets but I think a better solution would be to move the tracks to the deck and use barber haulers to move the jib clews inboard and out, and lead the sheets back to the cockpit winches.
The cabin is wedge shaped and somewhat reminiscent of the old Swan wedge decks. Somehow I cant quite picture an inflatable dinghy stored on that foredeck even though there is certainly plenty of room for one.

 The cockpit is huge, with plenty of wide open space for the working crew. The companioway hatch is sloped at about 45 degrees. Ill wager that the production model may well end up with a more conventional sliding hatch and seahood. The aft part of the deck is basically cantilevered out from the hull with sharp radii where it joins the hull.  This is not a particularly strong arrangement and there appears to be a strut that that supports the aft-most part of the deck. Notice that this bit of deck supports the mainsheet and spinnaker sheet winches. Im  sure J&J Design, who are listed as the project engineers, carefully analyzed this area and designed the laminates and geometry to resolve the high loads this area will experience when the boat is pressed.

The transom is wide open with the traveler  located as far aft as possible. The companionway hatch is set at an angle and the aft end of the weather deck appears to be supported by a strut near the transom. 
Beam is carried straight aft to the transom. 
Notice how small the rudders are relative to the keel. They appear to be no more than about 50 inches deep and are angled outboard about 20 degrees. They will probably be deeper than that in the production boat.  In this drawing the boom extends well beyond the twin running backstays. 


Accommodations in the CS50 are Spartan by Swan standards but I would feel quite comfortable spending a month or two living aboard this boat. The head runs the full width of the boat, or more precisely, is split by the centerline passageway, with the toilet and sink to port and a nice large shower to starboard. I really like this arrangement. In the bow youll find what appears to be a queen size berth along with lockers and shelves. Notice that it is set roughly eight feet aft of the bow, forward of which appears to be a crash bulkhead and lots of empty space. Swan states that all of the forward cabin furnishings can be easily removed for racing.



Simple, efficient accommodations.
The main salon is wide open, with very large settees to port and starboard, and a decent sized dining table on the starboard side. If I owned a CS50 Id want to entertain a lot, so Id have Nautor make sure the table will accommodate at least six diners. Aft to port is a smallish galley suitable for basic meal preparation. Notice the generator just aft of the galley. I think it might be a good trade-off to eliminate it and expand the galley a bit. Opposite the galley is a quarter-cabin with what looks like a king size berth and a hanging locker. This will be the nicest place to sleep when the boat is underway. The nav station is...well, there doesnt seem to be one on the CS50. I think this is because in a daysailer and weekender, you really dont need a nav station because all your navigation tools are in the multi-function screens at the helm stations. Still, Id like to see a chart table/desk on the boat. I dont use the nav station aboard my Beneteau 423 for navigating, but its a perfect all purpose place to work the SSB radio, manage ships papers and do all those mundane things I do at my desk at home.

I really appreciate that venerable, conservative Nautor has gambled on a truly new design for the 50. Having been a lifelong fan of German Frers designs, I would like to have seen what that firms answer to this design brief would have been, but Juan K got the nod instead. This is a bold step for Nautor and my hope is that it will be a huge success for them. I cant wait to see hull number one hit the water. For more information about this boat visit www.clubswan50.com.



Tuesday, April 5, 2016

Sydney GTS43 Review

The GTS43 was designed by Jason Ker and is intended as a racer/cruiser. Its pretty clear that by racer/cruiser they mean racer that has enough amenities below to accommodate the family for an occasional weekend cruise. But make no mistake, this boat is really all about performance. It caught my eye because the designer and builder have collaborated to create a unique and distinctive yacht that I think is going to attract a lot of attention among those who need a few amenities in their race boats.

The GTS43 looks fast under main, kite and staysl.

Jason Ker is not a household name in the USA but over the last twenty years this British designer has built an enviable reputation with his IRC racing yachts. The builder, originally based in Australia, has contracted with AD Boats in Split, Croatia to produce the GTS43 as well as the new GTS37. As you may know, this company also builds the Salona line of yachts. AD is owned by the Prevent Group, a multinational manufacturing corporation based in Wolfsberg, Germany that serves a variety of commercial and industrial markets. I think this is a business structure that we will see more of in the future. Yacht building has become so technology driven and capital intensive that for all practical purposes, the small independent boat builders are finding it harder and harder to survive.

The GTS43 represents a very different approach to hull design than more conventional racer/cruisers such as the Beneteau First or Elan lines. In the plan view it looks similar to other IRC inspired racer/cruisers, with a fine bow and wide stern. The same can be said of the boat in the profile view. But where those boats have full, or chined stern sections, the 43 has radically flaired sections aft.



Beneteau First 40. This Farr design incorporates what we think of as a conventional stern shape.
 Photo courtesy of Yachtworld.com



Elan 400  sports the currently fashionable chines.
Flaired stern on the GTS43.  
Why, you might ask, has Ker designed this boat with a stern that is so different from the more conventional Beneteau and Elan, or most other IRC racers. I think the answer may lie with his interpretation of the IRC rating system, or he may simply like the looks of this stern. I dont have a lines plan for this hull but we can make some judgments based on the photos. Lets deal with the stern first. The hull near the waterline is actually relatively narrow by todays standards so there is not a lot of reserve buoyancy there. This, combined with the somewhat slab sided midship sections of the hull leads me to think this boat may have a lower prismatic coefficient than a typical IRC racer. This means the boat will not require a lot of horsepower to get up to speed, but is likely to generate a bigger stern wave, which we refer to as induced drag as it moves through the water at hull speed. One benefit of the very wide stern is that the crew weight can be placed well outboard and aft, where it does the most good in heavy air. Here are some statistics:
LOA: 43 feet
Beam: 13.78 feet
Draft: 9.02 feet
Displacement: 15,320 pounds
Sail area (IJ+PE): 1,029 sq. ft.
Disp/Length: 86.0
SA/D: 26.8

This view provides an indication of the fine waterlines forward and the extreme flair aft. Photo courtesy of Sydney Yachts.


Maximum beam is carried all the way to the transom. The cockpit is spacious and side decks minimal.   

The high SA/D and low D/L indicate a powerful sailing machine that will demand a good helmsman and solid crew work when the breeze is up, but in return it will deliver stellar performance. Of course when its just you and the wife out for a sail, you may want to tuck in a reef and put the small jib up, which is a small compromise for such a high performance boat.

The cabin trunk is an interesting blister shape, with the aft ends of the cabin fairing into the wide cockpit coamings. The seats are tucked behind the cabin trunk, leaving lots of room in the aft half of the cockpit for working crew. The twin helms are located well aft, but it looks like there is enough space there for the helmsman and tactician.  The mainsheet traveler is located on the cockpit sole just forward of the helms, with the mainsheet winches within easy reach. This is another boat with an Admirals cup type mainsheet arrangement.

The rig incorporates a carbon fiber two spreader mast.  The mainsail luff length is about 60 feet and the foot is 19 feet. This is a big sail that will require some muscle to handle.  The jibs are non overlapping so tacking will actually be fairly easy. Notice the long, fixed bowsprit. It does not include an anchor roller so you may want to ask them to work on that when you place your order for a new GTS43.

I dont have any drawings or photos of the underbody of the boat, but Ker states that the keel incorporates a thin fin and bulb. My guess is that the rudder is also thin, deep and very efficient.

This is the keel on a Ker designed 46 footer. You can assume that the keel on the GTS43 is similar. Photo courtesy of Yachtworld.com




The bowsprit is not retractable.





The GTS 43 is  what I call a "live ballast" boat, which derives much of its righting moment from crew on the rail as shown here.

This boat has reasonably livable accommodations that would make cruising for a week or so tolerable for the family. The forward end of the boat has a snug v-berth which might be a good place for kids.
The dinette in the salon is smallish and offset well to port and the settee opposite is also situated well outboard. This leaves plenty of room amidships for packing chutes, which is important on a boat of this type. There are provisions for pilot berths above the dinette and settee. The nav station is large and has lots of storage space. The galley, opposite the nav station, is small for a 43 foot cruising yacht, but almost luxurious compared to the typical race-boat galley. There is a pair of private quarter cabins aft, each with a hanging locker and a pilot berth. Overall, while this is not what I would call a pretty interior, it is very functional. I could imagine spending a week or so aboard.


The v-berth looks fairly tight.


Lots of light and space in this limited but functional interior.


A single sink, two burner stove and limited counter space. 


It seems to me that the racing world is becoming more separate from cruising.  These days there are many forty foot daysailers on the market that make no pretense of being cruise-able.  This was almost unheard of twenty years ago. I give Sydney Yachts credit for attempting to bridge that gap and producing a racer that can be cruised even if its just for a week at the island. For more information about the GTS43 visit Sydneyyachts.com



 

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