Retractable hydrofoil on vessel

a hydrofoil and vessel technology, applied in waterborne vessels, vessel construction, hulls, etc., can solve the problems of uncontrollable ship back to the water surface, uncontrollable ship lifting force collapse, and defeat the primary purpose of a hydrofoil

Pending Publication Date: 2022-07-07
BOUNDARY LAYER TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this point, the lift force will collapse, and the ship can uncontrollably descend back to the water's surface.
At any slower speeds, the vessel either cannot be foilborne or will descend from being foilborne, which defeats the p...

Method used

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  • Retractable hydrofoil on vessel
  • Retractable hydrofoil on vessel
  • Retractable hydrofoil on vessel

Examples

Experimental program
Comparison scheme
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Embodiment Construction

I. Introduction

[0031]According to certain embodiments, methods and systems disclosed herein relate to a vessel and the operation of a vessel.

[0032]The challenge of designing a hydrofoil craft is to do so such that it has a low takeoff speed, and a high cruise speed. A low takeoff speed is desirable as it reduces the total power requirement of the engines that are needed to get to the low drag state this is being foilborne. A high cruise speed is desirable as it allows for faster transit between origin and destination. As discussed earlier, because current vessels utilizing hydrofoils have a static hydrofoil assembly, lift generated is only a function of speed. The amount of lift generated onto a vessel can only be achieved by a singular speed. Any higher speed and the lift will continue exceed the weight of the ship even when the vessel is already foilborne and any lower speed will cause the vessel to drop back into the water. Thus, the takeoff speed and the cruising speed are the s...

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PUM

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Abstract

Methods, systems, and devices are provided for a vessel comprising a retractable hydrofoil. The vessel can include a hull and one or more hydrofoil assemblies connected to the hull. Each hydrofoil assembly can further include a support structure and a hydrofoil operably connected to the hull via the support structure. Each of the hydrofoil assemblies can be configured to retract or extend from the hull such that the hydrofoil of each of the hydrofoil assemblies can move away or move close to the hull. During operation, one or more of the hydrofoils can be submerged beneath a water line. Alternatively, during a cruising speed of the vessel, one or more of the hydrofoils retracted from being submerged beneath the water line.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application claims the benefit of U.S. Provisional Application No. 62 / 830,981, filed Apr. 8, 2019, which is hereby incorporated by reference in its entirety.BACKGROUND[0002]A hydrofoil ship is a ship that has lift generating wings, foils, or hydrofoils, under the water's surface. As the ship moves, the foils create hydrodynamic lift from the motion of the water over their surface. The amount of lift generated is proportional to the plan area of the foils, the profile of the foils, the angle of attack of the foils, and the square of the average fluid velocity over the foils.[0003]As the speed of the ship in the water increases, the foils generate an increasing amount of lift, until eventually the lift force exceeds the weight of the craft. At a certain point, enough lift can be generated such that the lift force is greater or equal to that of the weight of the ship. At this point, the craft will accelerate vertically, lifting the enti...

Claims

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Application Information

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IPC IPC(8): B63B1/30B63B1/28
CPCB63B1/30B63B1/285
InventorKEARNEY, EDWARD TAHDAHOSBORNE, JEREMY PAUL
OwnerBOUNDARY LAYER TECH INC