Etat Francais

L'etat Francais, Represente Par Le Delegue General Pour L'armement

Robert J Balquet

Jean-Pierre R Guezou

Sylvain J Marcouyoux

Jean-Paul A Bertrand

Charles V De Smet

Michel Machabert

Bertrand Lambati

Philippe Carron

Jean-Paul Bertrand

Robert Baubeau

Jean-Pierre Guezou

Francois C Jodelet

The invention relates to a propulsion and lift system for speed boats with a submerged foil. According to the invention, foil (4) includes main lifting surface (11) and hinged trailing edge aileron (12) as well as components (14, 25; 15, 16) to inject gas at high velocity from the lower surface of the main lifting surface and the upper surface of the trailing edge aileron. This provides lift at low speed, in particular lift augmenting at takeoff and defines a nozzle (13) with a two-phase flow which alone provides propulsion at high speed by expansion of a gas-liquid emulsion in said nozzle. Application is to the design of fast hydrofoils.

Propulsion and lift system for speed boats with submerged foil

A surface effect vessel of a type comprising a buoyed structure with two side keels (20), a rear seal apparatus (100) and a forward seal apparatus cooperating to delimit a central buoyancy cushion (300). The rear seal contains a horizontal extension enclosure (100). A first piping system (54) connects a pressurized air generator (50) to the enclosure (100), and a second piping system (58) connects the central cushion (300) and the pressurized air generator (50). Fluid communication holes (150) are provided between the enclosure (100) and central cushion (300). The piping system (54, 58) and the fluid communication holes (150) are defined to ensure inflation of enclosure (100) to a pressure higher than the pressure of the central cushion (300).

Surface effect, side keel vessel containing perfected buoyancy systems

The present invention concerns hull shapes for a surface effect ship, including a catamaran type supported structure with two side walls (100) connected by a center platform (200), able to operate either as a buoyant displacement vehicle, or as an air cushion supported vehicle, the side walls (100) confining, with two sealing devices (310, 320), the supporting center air cushion (c). The shape features are as follows: each side keel (100) includes a floor segment (110), an inner wall (120) facing the air cushion (c), and an outer side wall (130); the floor segment is angled upwardly with respect to a horizontal plane, the angle increasing continuously from the after part to the fore part of the keel until forming a deep V at the most fore part; the inner side wall (120) is nearly vertical in the after and fore part and presents a bulge in its upper center part (170); the outer side wall (130) evolves from a concavely curved surface to a planar surface resulting in optimum performance for both modes of operation either as an air cushion vehicle or as a buoyant displacement vehicle.

Hull shapes for surface effect ship with side walls and two modes of

This invention concerns a surface effect vessel whose type comprises a buoyed up structure fitted with two side keels (20), an rear seal apparatus rear and a forward seal apparatus (200) both delimiting a central buoyancy cushion (300). According to the invention the forward seal apparatus (200) consists of an upper horizontal extension shell (210) extending between the two side keels (20) which communicates with the central cushion (300) so as to be supplied by it and two rows of lower multilobe skirts (230, 250) connected below the upper shell (210), which converge towards the center of the central cushion (300) from top to bottom, and whose concavity faces the center of the central cushion (300), the multilobe skirts (230, 250) together delimiting the intermediate chambers (254) which communicate with the upper shell (210) via ports provided in its wall.

Surface effect type, side keel vessel fitted with an improved forward

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Paris, France

Robert J Balquet