Dual-Rail Cargo Deck for Rapid Beach Offloading by ACVs
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Solution Overview
Problem
Existing amphibious vehicles lack efficient systems for rapid and versatile cargo delivery, particularly in remote and hostile environments, requiring additional support equipment for cargo handling.
Innovation Solution
An amphibious air-cushion vehicle (ACV) equipped with a dual-rail cargo system that allows for rapid discharge of standardized pallets directly onto a beach without the need for cranes or fork lifts, utilizing a propulsion system with gas turbines for high-speed operation and a dual-rail system for automated cargo handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional landing craft are used for cargo delivery, then they can operate in water, but they require additional support equipment (cranes, fork lifts) for cargo handling and cannot access remote unimproved coastlines
Solution Approach 1:
The ACV integrates multiple functions into a single platform: it serves as both the transport vehicle and the cargo handling system. The dual-rail cargo system is built directly onto the ACV deck, eliminating the need for separate cranes or fork lifts. The vehicle can deliver cargo to both improved and unimproved coastlines, making it universally applicable to various landing scenarios.
Solution Approach 2:
The ACV is self-sufficient in cargo handling operations. The dual-rail system with rollers and restraining apparatus allows the vehicle to load, secure, and discharge cargo autonomously without requiring external support equipment. The craft carries its own cargo handling infrastructure, making it independent of shore-based facilities.
2Productivity
If cargo is discharged using conventional methods, then cargo can be delivered, but the process is slow and requires support equipment
Solution Approach 1:
The patent replaces complex mechanical cargo handling systems (cranes, fork lifts) with a simpler roller-based discharge mechanism. The dual-rail system uses rollers that allow cargo pallets to be quickly pushed or rolled off the stern ramp by hand or with minimal mechanical assistance, dramatically speeding up the discharge process while reducing equipment requirements.
Solution Approach 2:
Instead of lifting cargo vertically with cranes, the system inverts the approach by using gravity and a sloped stern ramp to allow cargo to roll downward and off the vehicle. This reversal of the cargo movement direction simplifies the discharge mechanism and increases speed.
3Quantity of substance
If the ACV carries heavy cargo payloads, then cargo delivery capacity increases, but the vehicle requires powerful propulsion systems
Solution Approach 1:
The ACV uses a gas turbine-powered air cushion system to lift the entire vehicle weight plus cargo payload off the water surface. This pneumatic lift mechanism reduces friction and allows the vehicle to carry heavy payloads (up to 40 tons) efficiently. The air cushion provides both lift and reduces resistance during movement across water and land.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables rapid and versatile cargo delivery to unimproved coastlines, supporting high-speed offloading of up to 40 tons of cargo in minutes, compatible with well-deck ships and capable of operating in diverse terrains, including hostile environments.
Implementation Method 1
Propulsion and lift power is provided by two gas turbines, each driving a lift fan impeller and a propeller assembly through a combining drive line.
Implementation Method 2
lift air by centrifugal fans
Implementation Method 3
amphibious air-cushion vehicle (ACV)
Implementation Method 4
the palletized cargo is released and rolls off the stern over a stern ramp
Data Source
Figure 1
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AI summary
An amphibious air cushion vehicle includes an air cushion supported hull configured for travel on water and smooth land; a deck supported by the hull; and a dual-rail cargo system having tracks arranged longitudinally on along the hull cargo deck from an aft end. The tracks include (1) guide rails and rollers providing for guided sliding movement of palletized cargo along the tracks, and (2) locks for locking pallets in position during transport, The track is configured at the aft end for an unloading operation in which the locks are disengaged and the palletized cargo slides off the aft end onto underlying land as the vehicle is moving forward thereon. The track may be the one track of a single-track variant, or one of a pair of tracks in a two-track variant.