Title:
LOW DRAG SHIP HULL
Document Type and Number:
WIPO Patent Application WO2005060552
Kind Code:
A3
Abstract:
A low drag ship hull (10) generally includes a side air cavity (14) initiated by wetted bow section (16), bottom air cavity (18) initiated by wetted bottom nosepiece (20), wetted stern section (22) that closes a lower portion of the side cavity, wetted bottom tailpiece (24) that closes the bottom cavity, stabilizing fin (26), and propulsor (30). The bottom (2) of a catamaran hull cross structure includes bow impact alleviator (32). Optional flaps (34) in the stabilizing fins, together with optional all-movable cannard fins (28) are used for control. Different wetted bow sections and retractable plates (58) are used for starting side cavities. A low drag hull may utilize multiple air cavities. A new low drag hull includes a new upper bottom air cavity (90) that is initiated by an upper bottom wetted nosepiece (20), and closed by an upper bottom tailpiece (24). Alternative designs include a shortened forward hull spaced ahead of a shortened aft hull, and a hydrofoil-supported trimaran (230) with low drag hulls (246, 248).
Inventors:
LANG THOMAS G (US)
LANG JAMES T (US)
LANG JAMES T (US)
Application Number:
PCT/US2004/040307
Publication Date:
September 09, 2005
Filing Date:
December 03, 2004
Export Citation:
Assignee:
LANG THOMAS G (US)
LANG JAMES T (US)
LANG JAMES T (US)
International Classes:
B63B1/04; B63B1/06; B63B1/10; B63B1/12; B63B1/18; B63B1/24; B63B1/32; B63B1/34; B63B1/38; B63G8/00; B63G8/18; (IPC1-7): B63B1/34
Foreign References:
| US6439148B1 | 2002-08-27 |
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