The Final Auster
The D.6 emerged during a pivotal period in British aviation when military aircraft manufacturers sought to transition their wartime success into the growing civilian market. Auster Aircraft Limited, riding on the reputation of their highly successful World War II observation planes, planned the D.6 as the crown jewel of their D-series civil aircraft line during the late 1950s.
Manufacturing Heritage
Auster's journey to the D.6 began in 1938 as Taylorcraft Aeroplanes (England) Limited, operating from Britannia Works in Thurmaston near Leicester. The company initially built licensed Taylorcraft designs before establishing its own identity. On March 7, 1946, the company renamed itself Auster Aircraft and relocated operations to Rearsby aerodrome in Leicestershire, where the D.6 would later be developed.
The company's wartime production had been remarkable. Between 1939 and 1945, Auster manufactured 1,604 high-wing Taylorcraft Auster monoplanes for the Royal Air Force and Canadian armed forces, serving as Air Observation Posts (AOP). Production began at Thurmaston in February 1939, with the first aircraft completed on April 24, 1939, despite the staff's limited aircraft manufacturing experience.
The D-Series Evolution
The D.6 represented the logical progression from Auster's successful military variants. Earlier D-series aircraft like the D.4 and D.5 had already begun the transition from military to civil use, incorporating improvements such as enlarged windows, strengthened landing gear, and enhanced cabin layouts. These aircraft evolved from the combat-proven AOP designs, maintaining the high-wing monoplane configuration that had made Austers so effective for observation duties.
The military variants that preceded the D.6 included the Auster Mk. III, with 469 units built through December 1943, and the Mk. IV, which first flew on May 3, 1943. Later variants included 790 units of the AOP.5 and the AOP.6, which entered service in May 1945 powered by the de Havilland Gipsy Major 7 engine.
Engine and Design Philosophy
While specific engine details for the D.6 remain undocumented, the aircraft would likely have followed Auster's established powerplant philosophy. Earlier civil variants utilized engines ranging from the 145-horsepower de Havilland Gipsy Major to the 180-horsepower Cirrus Bombardier used in later AOP.9 variants. The Gipsy Major had proven particularly reliable in military service, while Cirrus engines offered enhanced performance for civil applications.
The D.6's design built upon decades of refinement that began with basic Taylorcraft layouts and evolved through wartime operational demands. Auster aircraft had developed distinctive features including sprung tailwheel landing gear, Junkers-style flaps, and progressively larger cabin windows that improved pilot visibility—a crucial factor inherited from their military observation role.
Development Termination
The D.6's development story ended abruptly in September 1960 when Beagle Aircraft took over Auster Aircraft Limited. This acquisition marked the end of Auster as an independent manufacturer and immediately halted D.6 development. While the D.4 and D.5 continued limited production under Beagle ownership, the more advanced D.6 was deemed unnecessary for the new company's strategic direction.
Interestingly, some D-series components lived on in modified form. A rebuilt aircraft later became the Beagle-Auster Husky prototype, which achieved first flight on October 24, 1962, incorporating lessons learned from the abandoned D.6 program.
Industry Context
The D.6's cancellation reflected broader changes in British aviation during the late 1950s and early 1960s. Industry consolidation was eliminating smaller manufacturers like Auster, while the general aviation market was increasingly dominated by American manufacturers offering more modern designs and larger production volumes.
A 1959 contract demonstrated the limited scale of Auster's final years: just 20 aircraft total, comprising fifteen D.5 and five D.4 variants. This modest production run highlighted the challenging economics that ultimately made continuation impossible.
Legacy of an Unbuilt Aircraft
Though no D.6 aircraft ever flew, the project represents an important chapter in British aviation history. It marked the final attempt by one of Britain's most successful wartime manufacturers to establish a lasting presence in post-war civil aviation. The D.6's cancellation symbolized the end of an era when small, specialized companies could compete in aircraft manufacturing.
Today, no D.6 examples exist in museums or private collections, making it one of aviation's most complete might-have-beens. However, surviving D.4 and D.5 aircraft serve as representatives of where Auster's design philosophy was heading, while earlier military variants remain popular with warbird enthusiasts, keeping the Auster name alive in aviation circles worldwide.