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B.A.L.M.Y. Charter Yacht

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This Yacht is not for Charter*

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B.A.L.M.Y. yacht NOT for charter*

47.3m  /  155'2 | mengi-yay | 2022.

Owner & Guests

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Special Features:

  • Built in 2022
  • RINA (Registro Italiano Navale) classification
  • Intimate beach club
  • Sleeps 12 overnight

The 47.3m/155'2" motor yacht 'B.A.L.M.Y.' was built by Mengi-Yay in Turkey at their Tuzla, Istanbul shipyard. Her interior is styled by design house Leonardo Santi Design and she was delivered to her owner in July 2022. This luxury vessel's exterior design is the work of VYD Studio.

Guest Accommodation

B.A.L.M.Y. has been designed to comfortably accommodate up to 12 guests in 6 suites. She is also capable of carrying up to 7 crew onboard to ensure a relaxed luxury yacht experience.

Onboard Comfort & Entertainment

Her features include underwater lights, beach club and air conditioning.

Range & Performance

B.A.L.M.Y. is built with a steel hull and aluminium superstructure, with teak decks. Powered by twin diesel Caterpillar (C32) 1,450hp engines, she comfortably cruises at 12 knots, reaches a maximum speed of 14 knots. B.A.L.M.Y. features at-anchor stabilizers providing exceptional comfort levels. She was built to RINA (Registro Italiano Navale) classification society rules.

Length 47.3m / 155'2
Beam 8.8m / 28'10
Draft 2.8m / 9'2
Gross Tonnage 498 GT
Cruising Speed 12 Knots
Built
Builder Mengi-Yay
Model Virtus 47M
Exterior Designer VYD Studio
Interior Design Leonardo Santi Design

*Charter B.A.L.M.Y. Motor Yacht

Motor yacht B.A.L.M.Y. is currently not believed to be available for private Charter. To view similar yachts for charter , or contact your Yacht Charter Broker for information about renting a luxury charter yacht.

B.A.L.M.Y. Yacht Owner, Captain or marketing company

'Yacht Charter Fleet' is a free information service, if your yacht is available for charter please contact us with details and photos and we will update our records.

B.A.L.M.Y. Photos

B.A.L.M.Y. Yacht

B.A.L.M.Y. Awards & Nominations

  • The International Yacht & Aviation Awards 2023 Motor Yachts Over 40m Finalist
  • The World Superyacht Awards 2023 Displacement Motor Yachts 499GT and below, 45m and above Nomination

NOTE to U.S. Customs & Border Protection

Specification

M/Y B.A.L.M.Y.

Length 47.3m / 155'2
Builder
Exterior Designer VYD Studio
Interior Design Leonardo Santi Design
Built | Refit 2022
Model
Beam 8.8m / 28'10
Gross Tonnage 498 GT
Draft 2.8m / 9'2
Cruising Speed 12 Knots
Top Speed 14.5 Knots

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Design Header

Choosing the right beam for a multihull

QUESTION:   When assessing or designing a trimaran or catamaran, what guidance can you give to guide the choice of beam ?             

                    Lech K:  Gdansk, PL

ANSWER: An interesting question as we do see quite a variation on existing boats.

First, let’s call the Overall Beam to Length ratio B/L and the individual hull length to hull beam, L/b .

Here are a few basics to consider as inputs to your overall beam choice.

*    More beam gives more transverse stability, permitting a powerful rig to drive a boat faster, but also,       excessive beam tends to lower diagonal stability so increasing pitch-poling.    More beam also tends to allow more  fore & aft pitching.

*    More beam requires stronger connecting beams (called akas on trimarans), aggravated by the two hulls potentially being now be in different waves

*    More beam can be a problem in a marina where space is increasingly limited

*    Folding trimarans can be limited in beam due to geometric space when folded, such as:     

Transverse folding system (Farrier etc) are limited by how far down the hulls can be managed when folded.  

Swing-arm folding is limited by the overall length increase when folded.

          Hinge & latch systems are limited by what height and weight can be lifted  

*    Less beam allows a boat to heel more, thereby reducing sail exposure to side wind.

*   Less beam brings the hulls closer together, reducing beam strength requirements and weight, but potentially adding to resistance from hull-flow interaction.

*   Hulls with a high L/b ratio can be closer together than hulls with a low L/b ratio if overall stability permits.

*   As smaller boats need proportionally more displacement due to crew and structural weight, they cannot have a very high L/b ratio as they then have insufficient displacement.

------------------------------------------------------------------------------------------------------------------------------

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So what do all these points finally lead to ?      Well, let’s see.

For Catamarans , the sweet spot seems to be with a L/B of 2 to 2.1.

If the beam is excessively increased, pitching and reduced diagonal stability (see dwg) start to become an issue and when such boats are lengthened to make their L/B slightly above 2, they generally become faster and have less negative issues ... but over about 2.3, their relatively lower transverse stability then starts to kick back.  

If the beam is decreased, stability drops quickly and one may start to also add wave interference between the hulls unless the boat is very light with slim hulls.

Of course, this is a simplification of things as top weight, windage, wing clearance, center of gravity, sail plan, etc etc .. all have their effects, though individually less than the important L/B ratio.

Let me give you an example of how other design criteria can move things from what may initially seem the ideal.  

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Beam also has a huge effect on stability.   But the designer Jan Gougeon (then of West Systems) was an inventive guy, so he approached this design in a non-conventional way.   To achieve his first criteria .. “a fast non demountable weekend catamaran”, he needed to address the obvious lack of stability in other ways.  A low rig could work with low weight, that would then allow very slim, fast hulls.   Then he added water ballast to help keep the windward side down …. and finally, a masthead float to prevent the boat from turning turtle, where she would stay like virtually all other multihulls do IF that happens.  In this case, it was rather often as unfortunately, most sailors were not ready to adapt to this new way of sailing and with capsizes happening too quickly for most, only a dozen or so were sold.  But I did get to try the boat and felt the concept did work in the sense that the boat IS fast and also comfortable & dry, as with such long, narrow hulls, there is very little disturbance of the surface water so spray is minimal and even if the hulls are pretty close, they are too slim to create any significant cross-hull wake- interference. 

To keep the rig low (mast is shorter than the boat), she uses 2 foresails that can be furled up fast.   Those that still own one have learned to understand them and can enjoy their merits … but this is not a boat with reserve stability for sudden gusts, so you need to sail this boat more like a race dinghy and also reduce sail early.  This further means that sailing at night when you cannot see squall warnings in the sky is best avoided unless the stars are truly out for you.

But it IS an example of thinking WAY outside the box .. even if the result is not for everyone.   So ‘sweetspot L/B ratios’ do not necessarily mean they give the only solution .. just that you, as a designer, also need to work differently around the rest of the design to solve the issues you might create if you are well outside the norm.    

The lesson here is:  If you choose to go outside the norm, fully understand the implications and work around them.  You cannot ignore them and still expect success. If the designer failed at all with this radical G32 design, it was in not sufficiently educating new owners of the different sailing nuances needed to keep the boat on its feet.

For Trimarans, my studies and observations show that the preferred B/L ratio changes with boat size. 

To some degree, the same effect on diagonal stability (as for Cats) will occur with excessive beam, but with a trimaran, the two hulls in the water will be closer so it’s also important to allow for good flow between them.  So as very large racing tris can have slimmer hulls due to great length and low weight, they can have proportionally lower B/L ratios than smaller boats that need proportionally fatter central hulls just to support the displacement they need.  After all, we cannot just change things in proportion, because the weight of things (such as crew, structure etc) will not automatically get smaller for a smaller boat .. in fact it proportionally and typically, gets greater!    So smaller multihulls can often be harder to design than larger ones, where you have more space and volume to work with.    The above observations led me to plot data from good boats and create this simple little formula that fits their B/L curve pretty well.

Here is what the curve gives as a recommended B/L ratio for a sailing trimaran

                            (Sailing Trimaran) B/L ratio  = 1.48 ÷ (L  ^ 0.21)        [ Length L in feet ].

While this may initially look complex to calculate for some, it’s very easy with the right help.  Download the Mobi Calculator on your phone or tablet.  You can then add the expression x n to your basic calculator by first hitting the 3 dots [ ... ] that brings you to the Scientific Options, and then   clicking on [ x n ] that will add this feature to your basic calculator.    You can now enter the formula exactly as written, typing 1.48 ÷ (  your L value , and then x n and finally 0.21 and the closing bracket ) and then ‘ = ‘.

If you enter say L = 17 , it will give you a B/L ratio of 0.816, closely matching a W17 , while for an L of 100 ft, it will give you a B/L of only 0.562, closely matching a big ocean racing tri like Sodeb’O.

While of course you can go outside the calculated ratio, IMHO you should have a very good reason and specific justification for a deviation of more than 15% either way.   Use the list at the beginning of this article to justify your change.

For both Tris and Cats, there may be other factors that will change your design, but this gives a good starting and target point that’s based on both practical and justified design needs.

Enjoy …. playing with figures is fun ;)

mike … march 2022

                                                                                                                                                                               

ADDED NOTE ... re MOTOR MULTIS

As noted, the above ratios refer to Sailing Craft.  Without the heeling force of a sail, pure motor-tris and cats are not bound by the same needs.

A motor catamaran can have less beam, with a clean flow between the hulls now taking prominence over high beam for sailing stability, so L/B ratios of 2.5 to 3 are now more appropriate.

Hulls may need to be asymmetrical with a straighter side on the inside to avoid unfavorable hull wave interaction between them.

For a powered trimaran , overall beam should also be reduced or the motion will become uncomfortable.  (With a sailing tri, the boat is heeled with one ama out, but with a motor tri, all three hulls are immersed so wave action on the boat would be too severe if the boat is too wide) .    Amas (pontoons) now need to be narrow but deep, as a slow gentle roll of slightly greater amplitude, is more comfortable than a short quick one.  These amas (now only 40-50% of the main hull length), seem best with their center about 60-70% aft of the main hull length and need to be of fine section and relatively deep with the connecting bridge arched high above any waves, so that neither ama or aka-bridge will slam when re-entering a wave.  L/b ratios of all 3 hulls can be at their most efficient, namely 13-16 at the waterline.   The amas are now more like permanent training wheels and with a much longer central hull and no heeling force from sails, diagonal stability is no longer something to consider.    Overall beam will depend on maintaining a clean flow between the main hull and the shorter slim amas, that need to extend well down into the water, so that motion is acceptable in waves.   Typical overall B/L ratios might now be down around 0.4, becoming even less as boat design gets bigger, provided the center of gravity is kept low.

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  • Dear guests, please note that only children above 14 years old are permitted in the fitness center, swimming pool zone, hammam, and sauna. FAQs (RU) , FAQs (EN) .

Welcome to our striking hotel with modern amenities in Moscow

Discover Moscow from one of its most iconic architectural symbols nestled along the banks of the Moskva River. Inside the landmark property, grandeur and opulence reign: from beautifully appointed rooms, suites, and serviced apartments to impressive amenities such as the 19 elegant restaurants, innovative sports and wellness facilities, and a panoramic bar on the 31st floor. Palatial surroundings, an excellent location, and exclusive services await.

Centrally located, the Radisson Collection Hotel, Moscow offers excellent transportation links to the four surrounding airports and top attractions. The hotel also commands a flotilla of ten yachts, offering year-round river cruises for a unique perspective of city landmarks.

Individual Room

Collection superior room.

  • 1 child (0-11)
  • 2 twin or 1 double or 1 queen or 1 king

Collection Superior Room - City View

Collection superior room - white house view, collection premium room.

  • 2 twin or 1 king

Collection Executive Room

Collection suite.

  • 2 children (0-11)

Executive Suite

Romantic suite, grand residential suite, presidential suite, one bedroom apartment.

Our Moscow hotel offers ample venue options for customized events. Host a meeting in our unique library venue or plan a reception in the Banquet Hall. A dedicated Meetings & Events team will help you select from our versatile meeting rooms, halls, and other unique venues to plan the perfect gathering.

Cots available

Cots available upon request

Dry cleaning

Dry cleaning services

Express check-out

Fitness center

Fitness Center

Luggage storage

Meeting facilities

Meeting facilities/social space

Running trails

Customized running trails around the hotel

Safety deposit box

Hybrid meeting

Hybrid Meeting

Nearby Attractions

Bolshoi theatre.

Spend an unforgettable evening at this legendary theatre - the oldest in the city - with its world-leading resident opera and ballet troupes.

Moscow Kremlin

Snap a selfie outside Moscow's most famous historical and political landmark: an impressive walled complex of cathedrals, palaces and state offices.

Fall in love with the residents of Russia's largest zoo, now a huge scientific, educational, and conservation institution.

How to get to the Radisson Collection Hotel, Moscow

Welcome to the exceptional.

Discover the unique collection of iconic properties reflecting an authentic local influence, living design, and vibrant social scene.

IMAGES

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  2. Lighting-fast 25m Victory Design yacht Bolide 80 nears completion with

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  3. B L A C K L E G E N D The 49.9m Black Legend yacht was built in 2017 by

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  6. Future of Luxury Yachting: The 25 Best Yacht Brands

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