Executive Summary
This study evaluates improvements and replacement designs for the aging LARC V amphibious vehicle, used by the U.S. Navy for amphibious operations and diving support. It analyzes modifications to the existing LARC V and proposes a new conceptual design, the Dive Platform Catamaran (DPCAT), to meet increased performance and mission requirements. The research focuses on hydrodynamic modeling and power calculations to enhance speed, stability, and reliability.
Why It Matters
This document is crucial for defense analysts as it details the engineering challenges and proposed solutions for upgrading critical amphibious logistics and support vehicles, directly impacting naval operational capabilities and future procurement decisions. It highlights the continuous need for modernization in military hardware to meet evolving mission demands.
Key Takeaways
- The LARC V, designed in the 1950s, is outdated and struggles to meet modern U.S. Navy mission requirements for speed, stability, and reliability in demanding surf zone and diving operations.
- Conceptual designs, including modifications to the LARC V and a new Dive Platform Catamaran (DPCAT), are being explored to address increased performance needs, such as higher waterborne speeds and improved dive support capabilities.
- Achieving significant speed increases for amphibious vehicles requires substantial hydrodynamic modifications and alternative propulsion systems like water jets, as simply increasing engine power is inefficient due to hull resistance.
- The study emphasizes the need for improved reliability, maintainability, and component compatibility (e.g., with MTVR engines) to reduce operational costs and enhance vehicle readiness.
- The DPCAT concept introduces a dual-hull design with adjustable beam and retractable wheels, aiming to optimize both land and waterborne performance while addressing transport limitations like C-17 aircraft compatibility.
Strategic Relevance
This study directly impacts the U.S. Navy's amphibious capabilities, particularly for underwater construction and special operations. Modernizing or replacing the LARC V is critical for maintaining operational effectiveness in littoral environments, ensuring logistical support, and enhancing diver safety and mission success. The engineering analysis provides a foundation for future amphibious vehicle development and procurement strategies.