1. Concept
We called our “The New Trimaran” or TNT on purpose. This will be a new “exploding” and exciting trimran to be harnessed by experienced sailor yet still friendly for family. The new folding system which will be explained below allows an extra beam for up to 8.5 m or 28 feet. This extra beam which is the widest than any other similar sized trimaran in return allows to carry extra sails up to 20 % more than comparable trimaran. This is where TNT will excel whether in fast cruising or racing. Simply put it extra beam means extra sails and that means more speed. At 1890 kg (4160 lbs) this boat has to excel.
2. Data
• Length 10.4 m (34 ’)
• WL 10.0 m (33 ‘)
• Unfolded beam 8.5 m ( 27.5 ‘)
• Beam folded -marina mode -3.9 m (12.8 ‘)
• Beam folded -trailer mode -2.99 m (9.8 ‘
• Disp. Disp. 2.2 T ( 4850lbs )ready to sail, custom trailer galvanized 0.8 T
• Mast 15.1 m (made in France ) =50 ‘, see rigging design
• Sail Area: Main 55 m2 (591 sf) jib 26 m2 (215 sf)
• Power O/B 15-25 hp to push up to 9-11 knots
• Bottom -flat to encourage early planning,
• Floats at 1:22 ratio. Lots of buoyancy forward to prevent pitchpole
• Plumb Bow on the main hull and axe bows on floats
• Dual steering station (optional) for power, like on MC 30 and tiller under sail
• Large open cockpit
3. Speed Predictions and Pricing
TNT is made to plane in 8 knots or higher boat speed due to very flat transom and hull in general. See below. The weight of 1890 kg or 4160 lbs of TNT should allow to ”rise“ very quickly even in 10 knots of winds. Foils which are optional should help this effect in stronger winds and also provide additional stability. Final speed prediction and polar diagram will be published shortly. We expect first few boats to be sold under MRSP 199,000 Euros complete with rotating mast (mast folding included) and sails.
4. Interior
We are aiming for similar finishes as our Motorcats. There will be many elements that will come from tooling of MC 29 and 30 and please see attached samples from these two boats. Our custom made for Bond Yachts “suede” liner gives a nice touch and softness to future TNT 34. The liner is padded and almost as light as fairing and paint on other boats. TNT will have a very voluminous interior and headroom of 1.95 (6’3“).
5. Pivot/sliding system
This is a novel way to approach folding developed by J. Kostanski in 2009 and subject to a patent. The idea was to combine two movements into firstly sliding and then pivot as the beams are coming in via 60 cm( 2 ft) long sleeve. Amas are supported by water due to small designed buoyancy thus making folding possible and easy . On the trailer the floats are tacked away under the main hull without any disassembly . The sleeve (of marine aluminum - anodized ) is acting as solid long holder once bolted to the deck (similar bolting takes place on Farrier system). Once the beam is locked in the sleeve the float is fixed via cantilever to the main hull. To reduce forces a two S/S wire struts will be provided for each float.
Sliding will be easy thanks Teflon strips inside the sleeve and ss strips on the beams. The beams require precise tolling to avoid jamming and special aluminum tooling will be employed to assure straight line and smooth gliding. The folding in will be also quick and effortless due to using the winch on the deck.
Advantages:
- TNT folding system allows for the largest beam compared to the similar trimarans thus extra sail area
- ultra stable at 8.5 (27.5 ‘)beam on 10.4 m (34 )overall length = 82 % beam to length ratio
- when folded TNT is stable whether mooring or motoring
- very quick folding in by using winches of less than 1 minute which makes this
trimran practical for docking in regular marinas
- floats are not subjected to marine growth
- to trailer no beam or float removal is needed which saves time and effort
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