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Neptune, P2V-I, an aircraft identification poster issued by the Ministry of Supply, provides crucial specifications and details for the P2V-1 aircraft. This document, aimed at various UK military branches, reveals the characteristics of the aircraft, noting its duplex cyclone aero-engines, cruising speed, maximum speed, length, and span.

The post-World War II era saw an unprecedented evolution in aviation technology and design, driven by the needs of the Cold War and the anticipation of potential future conflicts. The 1940s, in particular, was a decade of rigorous research, innovation, and the production of various aircraft models, tailored to specific military and strategic needs. The P2V-1, equipped with two duplex cyclone aero-engines, was part of this evolution, designed to meet the demands of a rapidly modernizing armed forces.

The detailed metrics provided in the poster, such as its cruising speed of 170 m.p.h., a maximum speed of 300 m.p.h., length of 75 feet 4 inches, and span of 100 feet, offer a snapshot into the capabilities of this aircraft. Such parameters were essential for military personnel to identify and understand the performance of the aircraft, allowing for effective strategy planning and operations.

In the context of military aviation history, this poster stands as a testament to the meticulous efforts made in documenting and disseminating aircraft specifications. It underscores the significance of information distribution among military personnel and the pivotal role played by such documents in ensuring smooth and informed operations during a period of intense geopolitical tension.