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Semi Cutter: simplified operation for small crew on ocean cruise

A special large dimensioned boom jib which can be safely reefed from the cockpit replaced the usual labour- intensive tacking jib at the inner forestay as standard- foresail when tacking or at heavy weather and avoid the DANGEROUS way on the foredeck for sail changing in heavy seas. NOT at the same time but ALTERNATIVE a quite large RIFTER at the outer forestay is used for open courses to approx.. 40° which is a combination of Reacher and drifter of race- sloops; combined with a furling- jib- gear or a roller- reefing gear. This makes Blister or Spinnaker as far as possible unnecessary (nevertheless, they can be used of course if wanted)

A relatively small main sail can be handled simple and safe even at larger ships by a small crew. Expensive, trouble-prone main- sail roller- reefing gears with high top weights and sail cuts almost without performance are not necessary!

Only for extreme situations still another special storm jib can be used above the boom jib lashed on its boom.

Who wants it still more simple and more effective, selects the "TRECKER": this patented, pre-balanced fore- sail of our system suppliers >Segelwerkstatt Stade< ( (sail) and >ORCA- Technik< (rig) optimises the boom- jib also for reaching courses combined with simpler operation, better performance at less heeling and thereby more sail comfort. ( This sail can be used as sole fore sail, completed, if necessary for light wind by a flyer: a multi- purpose sail from strong storm spinnaker cloth as simplified Blister- replacement, which can be fast and easily tied to the railing or crammed into the sail bag.

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Double hard chine advantages
The slender a hard-chine boat is, the more the boat is pointing high.

Contrary to Multi- hard-chine designs or classical Veer- shaped boats double-hard- chine foreship set very softly into the sea at upwind courses, because they become to a sharp Vee- shape frame when heeling.

The whole behaviour of the optimised double hard chine design is practically almost identical to that of the modern trapezoid- shaped designs. In principle it is a trapezoid- shaped boat where the bottom and chine corner radii are reduced almost to be sharp- edged.

This is exactly why the correctly designed double hard chine hull sets incomparably softly into the sea when pointing high!

However the design of optimised double hard chine hulls is one of the most complicated tasks. Our well- proven trapezoid- shaped hulls with stretched displacement distribution were therefore developed based on a series of over 200 tank towing tests in the USA, in which above theories were confirmed and lines were optimised.

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Enormous advantages: ASY- Twin keels

Upright falling dry for works under water line or at strandings, well suitable for tide districts. Simple transport without cradle or supports or even shifting on pipes laying under keel.

Good bottom protection e.g. against reefs and underwater rockies.

Simple slipping without supports on each primitive slip.

Good course stability, almost like long keeler.

Good reaching performance.

Neither wear and tear or failures nor rattling or corrosion, as with lift and swing keels.

Until here also conventional bilge keeler have the same advantages. But:

Bilge keeler are almost known to everyone because of rather poor sail performance, especially when pointing high and symmetrically profiled, if at all.

ASY Twin keels

in contrary thereto are situated far down in the bottom chine area of modern trapezoid shaped or double hard chine hulls. There they operate effectively in almost turbulence-free water. Their distance to each other as their vertical skew are relatively small.

Therefore the draft is reduced already again above approx.. 20° heeling which enables a stranded yacht to come free by conventional heeling of the boat (practically not possible with bilge keelers).

The asymmetrical profile

of the ASY- twin keels is however the main advantage of this trend-setting keel- system!

Like an airplane- wing- profile the leeward ASY- keel creates a drastically higher "transverse-lift " in windward direction, than each symmetrical profile ever could. The windward ASY- keel operates in the "inverted flight- position" and still provides a positive component in windward direction and, by the skew of the keel, with a component downwards which is righting up the boat. In many years of evolutionary development in practice we could achieve that our ASY- twin-keeler run with similar height and speed at the wind like comparable centre keel boats!

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CE- marking
The CE- pleasure Craft Directive was introduced by the EEC, in order to enable by a uniform minimum standard the free trade of pleasure boats throughout whole Europe without restrictive national regulations, which should protect usually only the native manufacturers against foreign competition.

That is good if it is clear to you that this CE- MARKING is only the "passport" for your boat and NO QUALITY MARK.

Bad is however that for obtaining this "passport" an enormous bureaucracy was developed, causing an enormous amount of paper and additional money, but mostly without increasing thereby the quality or the standard of the ships.

Even leading managers of large classification societies, which live well from this system, regard the CE- Pleasure Craft Directive a "large nonsense" when speaking privately.

OUR SELF- BUILDINGS DO NOT NEED THIS, because self- buildings are excluded from requirement of being CE- marked , as long as they are not sold during a period of five years within the community market (from "Directive 94/25/EC, chapter 1, art. 1, 3g"). Better use the saved some thousand Euros for liferaft, Epirb, radar or other additional equipment.

Only somebody who ORDERS a COMPLETE REINKE- yacht needs a CE- certification: For this purpose the drawings necessary for CE- Approval for ships over 12 m are type- approved already successfully. All further additional costs of certifying are then to be taken over by the owner.

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REINKE's alternative YACHT 4/ Info Pläne (info plans)

contains detailed description, photos and scaled drawings of all boat types, information over the system and a technical manual with references to all topics covered in books specified below (All in German only). This is the next step to the successful self- building, therefore order immediately


The proven standard book of Reinke/Luetjen/Muhs covering all areas of yacht building now in the 5. revised edition, among other things with "CE- experiences" etc.

Publishing house Delius Klasing, ISBN 3-7688-0220-5, 808 pages, 72,- EUR in book shops (German language)

Alternativer YACHTBAU 2

(Alternative YACHT BUILDING 2)

Our system book and building manual with 240 pages in A4 is part of construction drawing delivery for our licensees only. No longer available for free sale (German language)

Wie baue ich meine Yacht

(How to built my own yacht)

Everything over the general and financial prerequisites for yacht self building. By Kurt Reinke, from the small yacht library of Delius Klasing. 220 pages, approx.. 9,50 EUR. Last copies are still available in the book trade- no new issue planned within the next years. Safe your copy now. ISBN 3-87412-106-2 (German language)