The Nu-Sa factor = utility and asset factor for yachts ...) * ... and the specific yacht price.

The value in use and real value of a yacht is more important to the buyer than the price. This is not only important for the period of its use of the yacht, but also for the later yacht sale. Just as the purchase price of a condominium apartment per m² is a statement about the market value of the apartment, a similar statement and comparison is possible by the Nu-Sa factor) * for yachts. Alternatively, the specific yacht price may be considered a comparative value scale. Please read: Basic data for the NuSa factor: A) = m2 of free deck area divided by the yacht length in meters and B) = m2 of cabin area with head height divided by yacht length in meters. Adding these values, sum divided by 2 gives the utility u. Factor factor (= Nu-Sa factor) for the yacht in question. Calculation example NuSa factor: conventional motor yacht, length 15 meters, width 4.5 meters: To A) = Free deck area (walkable) 30 m² = 30: 15  = 2 / Decks factor. To B) = cabin area (with head height) 21 m², 21: 15 = 1,4 / cabin factor. Result NuSa factor:       2 / Decks factor plus 1.4 / cabin factor divided by 2 =  1.7 Nu-Sa factor.

First determination of the potential yacht buyer: It does not make economic sense - as regards the NuSa value content, to buy a monohull yacht. The reason: Since the base for the NuSa factor is the m² deck and m² cabin surface, the monohull yacht always has the lowest NuSa factor. To buy a yacht like this –  most the sport-faktor is the reason.

We investigate this situation here - using the example of a conventional motor catamaran, (eg LEOPARD) Length 14.4 m, width 7.5 m: free deck area = 36 m², cabin area / head height = 28 m²; the NuSa factor of this catamaran = (36: 14.4) + (28: 14.4) divided by 2 = ......... 2,2 NuSa factor. This NuSa factor of 2,2 is about 30% higher than the NuSa factor of the monohull motor yacht (= 1.7).

Second determination of the potential yacht buyer: With the knowledge of the facts about the NuSa factor, the potential yacht buyer now turns to the market of catamaran yachts. He notes that there is a catamaran offer with the yacht name He sees that the usable deck area and cabin surface are much larger than in conventional catamarans. With this yacht of 15 m length and 6.4 m width, the deck areas are approx. 79 m², the cabin areas with head height approx. 43 m². From this he calculates a Nu-Sa factor of =.4.2. So about 80% higher than the NuSa factor of a conventional catamaran with 2.2.

Third determination of the potential yacht buyer: he examines the catamaran market in order to find comparisons for the SCHWEBE yacht - with the same deck and cabin offer. He notes that such offers do not exist because the technical data of the SCHWEBE yacht (= Patent.a) are unique for design reasons. The prospective buyer makes price comparisons between conventional catamarans and the SCHWEBE yacht and - determines the specific yacht price:

Fourth determination of the potential yacht buyer: For a price comparison, it is based on the price of the LEOPARD catamaran (= example) which amounts to approx. 560 TSD € (= 2nd hand yacht). He divides this price by the total Usable area of ​​64 m², which this yacht offers = 560 TSD €: (36m² + 28m²) The result is the specific yacht price / m² = 8.750, - €. This m² yacht price is multiplied by the total usable space of the SCHWEBE yacht. The result is: 79m² + 43m² = 122 m² x 8.750, - € / m² = 1.067,-- million € would be the negotiable Schweb eyacht price. This yacht has These additional benefits: The anti-seasickness technique (= no rocking), technology for pinpoint turning maneuvers, 40% fuel savings. Extremely quiet. This sum of benefits of this yacht now induce the yacht prospect to purchase the floating yacht. • Advantage for the yachting company: In the future it will make about 100% more profit for the same costs. K.N.IWAN, 19.8.18  * Formula protected by copyright DPMA.

anti-rocking mechanism is also used for passenger ferries/tourist boats

Oktober 2013

The first time, our anti-rocking mechanism is also used for passenger ferries/tourist boats: Not only the concept and the facilities are comfortable, this concept is also optimal for handicapped people. Similarly, the behavior of the boat in the waves allows a comfortable stay on board: No rocking, no seasickness anymore

Schwebe-Yacht Personenfaehren Schwebe-Yacht Personenfaehren Draufsicht

Luxury tourist boat (ferry) for 40 people. Depending 4 pers. in a separate, enclosed seating area with entertainment and communication technology, keep personal luggage. Boat constructed by handicapped accessible Design. Captain's cabin and two cabins for the crew, six toilets. Boat is a special construction; movably maintained cabin hull does not swing in waves. No seasickness. German patent a.

  1. Command Station
  2. Two tabels, seats
  3. Storage for bar, equipment
  4. Storage for chairs disabled pers.
  5. Snacks and drinks
  6. Movable cover of slip box is open
  7. Bottom of slip box
  8. Rubber dinghie for 5 persons
  9. Open slip box cover
  10. Lift für disabled persons
  11. Dinghie position to go in and out
  12. Connection gangway floating hulls
  13. Slip box is closed, in site dinghie
  14. Plattform on the bow, usable by passengers
Main technical data:
  • Catamaran. L = 22 m, W = 6.8 m, draft. 0.7 m
  • Cabin-Hull.. L = 19.5, m, W = 5.4 m, H = 4.3 m from CWL
  • Construction of the boat weight about 13.5 tons.
  • Maximum operating weight (40 people on board.) Appr.19 t
Material: carbon fiber lightweight panels, aluminum
Machinery: Two Yamaha with 180 kW shaft power. Max speed 22 knots. Boat can turn on the spot by 360 °
The boat is built to the standards of the Germ. Lloyd.


February 2013

The extremely large deck, the yacht floating (DPA a) ideal for solar operation.

The given, design requirements, to extendable or retractable provide additional solar panels are unique to this type of vessel. A completely self-powered vessel operating with a drive up to 15 knots is possible.

Years ago, the autonomous solar-powered yacht was a gimmick. Today, the associated technology has matured so much that it is possible only with solar, so fully autonomous to operate a boat. And with a cruising speed of 12 to 15 knots. At its peak, even to 3o knots.

One problem, however, is found on most boats: The problem with ...

  • as large solar panels and still a ...
  • minimum constraint for the people on board / deck

Our technology offers – reosanable by the yacht design - the best compromise:

You see the enormous solar surface. As you see, by the extension of the adjustable solar panel (to StB and BB), can not only increase the solar surface. It can also significantly increase their efficiency (= tilt toward the sun ...).

Benefit to the people: aft (rear) on the hulls, sides, and on the bow is still much space for the stay of persons available .Also on the side where the solar panels are adjusted to above (plus tilt ...) there is an optimal light incidence in all cabins. If you want sun, you go to the bow or stern bathing platform (rear, which can be up to 18 square meters).

Front Views of the Solar Boat:


Left: horizontally extended, additional solar panels (from about 11.00 h to 15.00 h). Note the max. Width of 13 m, 23 m deck length of this yacht!

Right: inclined additional solar surface, disguised (approximately 8:00 to 11:00 and again. 15.00 to ....).

Legend: A = rail, B = mobile S-surface, C and G = telescopic support, D = float of the Cat, E = coachroof,

Top views of the Solar Boat:


Above the additional S-surfaces are the upper deck retracted (eg port call). A deck cabin superstructure reduces the S-surface, since this roof can also be fitted.

Below the S-surfaces are extended on both sides horizontally. The 2m-bathing platform aft (rear) and passenger area, the floats (under the solar surface) walked to the bow.

Our current research / development. In addition to solar power, we intend to utilize the wave energy that is available to us from the operation of our anti-swing technique. Here, the permanent movement energy is always available - even without sun - are converted into electrical energy.

On this website we will keep you informed of our progress of these developments.

An economical alternativ to solar:

These advantages of the new invention brings the RAH - automatic with Spira sails an alternative to solar power

First of all: Of the 12 benefits / protection requirements of this technical innovation, such as listed in the patent-writing, here are the 7 benefits that potential users with general technical knowledge of drive technology and with her interest in a yacht with additional Yacht alternative drive are immediately obvious: Spira = combination of spinnaker and square sails on special framework.

Schwebe-Yacht Spiral Segel
Here half reefed

1. What makes this solution NEW? The sail is a Spinnaker- /sqaresail-kombination (= Spira). It can regardless of physical force is and out-so exposed person from the cabin without that person the weather, set partly-and fully reefed. The framework as reefing device (Pat.a.) consists of a flexible shaft, which may in addition make-hoist and reef-a continuous, positive bulge of spirals sail.

2. The Spira rigging as an additional alternative, energy-independent from Yacht Drive has over the other self-powered ship propulsion systems such as first enable solar or wind generators the advantage of the sailing crew experience a higher profit than when using the alternatives that are nothing more than a motor drive.

3. The alternative drive with a Spira sail rigging is against solar power much cheaper in terms of specific investment in this technology. Specifically, this means that to achieve the same speed as with solar-powered boat, only about 40% of the solar investment costs are investing in this technology

Schwebe-Yacht Spiral Segel voll gesetzt
Here set full 115 m²

4. Compared to the highly complex solar technology, this Spira technique is simple and can be repaired in case of need in every port in the world, without expensive replacement parts, which are often not available on the site as well as specialists who often have to be flown to the site of repair.

5. The Spira sailing technique is superior not only in terms of investment costs and driving performance compared with the solar energy to an essence: Obviously everyone is that even the wind blowing on the sea at night. The sun, however, is the only solar technology a day - and that not always. Knowledge: total cost considered is every reason to Spira Sail additional equipment. The sum. Less expensive and more efficient.

6. Comfort Advantage: A solar system on a yacht makes almost the entire top surface of the persons on board unusable, because it is not accessible. The Spira rigging a multihull for the mast requires at most one square meter of deck area.

7. Aesthetics: A yacht, equipped with solar technology, has inevitably had to remove his appearance far from the aesthetics of a ship. The opposite is in Spira rigging case: The square sail has always been the symbol of the seafaring - and is perceived as such by many as a visual component of a multi-hull yacht.
(DPMA Anmldg. K.Iwan 24.4.13)

cabin whith the large sun (solar) deck

April to June 2012

The upper deck of our "smallest" yacht is about 64 square meters, the design is based on customer requirements, either as a sun deck with mostly open space, or with an separat cabin-section. Rear left is the opening for the future decline to be seen. (The chair in the middle of the deck is used for size comparison.) A large deck will be well insulated against the sunlight, so grid plates are loaded with 5 cm thick blue styrofoam. In addition, a 5 mm thick cork deck. This is applied to the aluminum frame of the upper deck.

Note: In our series of new types of solar electric yachts we are, with the largest contiguous area of deck boats, solar power especially suited deck boats, solar power.

Completion of the hulls and installation of engines

May 2012

The hulls will be transported along with the form for further processing to other manufacturing space.

Arrowhead hulls is high speed with minimum fuel consumption. Can be clearly seen in the figure, as the blank form of a hull of his "peeled" is.

Furthermore, we build only the extremely high-quality marine engines. Economical to use, a good kg / hp ratio and a low-noise operation are guaranteed!