Lower part of the hull of a planing amphibian

Details Lower part of the hull of a planing amphibian Lower part of the hull of a planing amphibian

1998-03-11

1999-12-21

Dayoan, D. Glenn

Ships

Hull or hull adjunct employing fluid dynamic forces to...

114284, 114361, 114 6125, B63B 100, B63B 122, B63B 1700

Patent

active

060034653

ABSTRACT:
An improved design for the lower part of the hull of a planing amphibian. The design contains an immovable member, a dampening movable member in the form of a set of overlapping plates attached to the immovable member by the length of the front edge, and air balloons placed in between the movable and immovable members. There is also a flexible coupler attached to the longitudinal edges of the immovable and movable members permitting elastic bending of the plates. The plates forming the movable member are made of a nonwettable, elastic material, allowing elastic deformation of the movable member when the amphibian encounters land obstacles. The air balloons help to dampen the deformations. When operating on rough water, the plates forming the movable member elastically deform and compress the air balloons, decreasing the loads on the lower part of the hull. When the amphibian returns to land, the plates elastically deform and impact one another, shaking off any adhering ice. The pressure in the air balloons varies depending on the type of surface on which the amphibian is travelling. High pressures of 0.2-0.3 atmospheres are used when traveling on water or soft surfaces and low pressures of 0.05-0.08 atmospheres when moving on hard surfaces such as ice or snow. This insures minimal resistance when moving on water and minimal overloads when moving on hard surfaces. When operating mainly on water, the outer balloons can be inflated to a higher pressure than the other balloons, giving the lower part of the hull a "seagull wing" shape, increasing the stability of the amphibian.

REFERENCES:
patent: 2265206 (1941-12-01), Stampfl
patent: 3056980 (1962-10-01), Holladay
patent: 3413948 (1968-12-01), Coll
patent: 3496899 (1970-02-01), Weber
patent: 3559222 (1971-02-01), Walker
patent: 5732650 (1998-03-01), Peterson

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