The boat

The launch is designed for displacement sea keeping. To lessen energy expenditures positive interference of bow sea and quartering waves is used that appears at a boat speed corresponding to Froude number = 0.27.

To decrease bow sea and resistance increase during sea roughness maximum sharpened bow lines are used. Raked stem and flaring of the frame would afford climbing up a wave. A frame radial form and proportion of a length - width - draught provides for the required displacement with a minimum of wetted surface. Stern bow lines are made sharpened to afford resistance decrease at given speeds and good behavior in following sea.

A new methodic for calculation of both resistance and economical efficiency of displacement for motor boats was developmed and published in "Boats and yacht" magazine №176.

Boat's length along the waterline is 8.2 m, its width - 2.3m, displacement is 4.7m3, full fuel tankage is 2100kg, a boat crew in the route is 1 person, cruising speed is 4.7 knots (corresponding to Fr=0.27). Two diesel engines will be install, capacity of 4.8 h.p. each. While moving at a cruising speed one of the engines will be in operation at capacity of less than 2 h.p, consuming about 0.5 l. of fuel per hour.

A screw propeller is installed on a column allowing to take the propeller away together with the column through a special manhole inside the boat. The whole layout was designed bearing in mind that the crew (in a route plying will be only 1 person). A closed wheel house with a circular perspective view is equipped with a galley and a berth giving a possibility for constant observation of the surrounding situation. To maintain stability water ballast will replace the consumed fuel.

Good boat resistance to sinking is provided due to the fact that the interior of the boat is divided into a large number of isolated compartments. Because of a high superstructure and a low disposition of center gravity the boat will bring on an even keel independently in case of capsize.
The boat is also equipped by a heating system, a stove to cook and a water-desalinater, using engines' heat, a wind generator, solar batteries, a rain-water gathering system, navigation devices, an autopilot system, a radio locator and a satellite communication system.