Title:
WATERCRAFT WITH STEPPED HULL AND OUTBOARD FINS
Document Type and Number:
WIPO Patent Application WO/2010/148037
Kind Code:
A3
Abstract:
A watercraft (99) having a stepped hull (100) including a forward hull portion (103), a first stepped hull portion (106), and optionally a second stepped hull portion (108). Outboard ram air fins (120) extend outwardly from the hull and downwardly along the stepped hull portions. Outboard strakes (110, 112) are fixed to the stepped hull portions, and may be tapered to define ports thereto. During planing operation the channels defined by the fins compress the incoming air which is thereby at least partially forced under the stepped hull portion. In level operation the flow through the channels tends to keep the stepped hull portions in good contact with the water.
Inventors:
HANSEN WILLIAM M (US)
Application Number:
PCT/US2010/038737
Publication Date:
April 21, 2011
Filing Date:
June 15, 2010
Export Citation:
Assignee:
SAFE BOATS INTERNAT L L C (US)
HANSEN WILLIAM M (US)
HANSEN WILLIAM M (US)
International Classes:
B63B1/20; B63B1/26; B63B3/44; B63B7/02; B63B39/06
Foreign References:
| JPH06122390A | 1994-05-06 | |||
| US6666160B1 | 2003-12-23 | |||
| JPH01282086A | 1989-11-13 | |||
| JPS63142294U | 1988-09-20 |
Other References:
See also references of EP 2443027A4
Attorney, Agent or Firm:
DODGE, Ryan, E., Jr. (1420 Fifth Avenue Suite 280, Seattle WA, US)
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