De havilland tail first mail plane

You're referring to the de Havilland DH.91 Albatross, a British twin-engine, all-metal, high-wing airliner that was designed and built by de Havilland Aircraft Company in the 1930s.

The DH.91 Albatross was a significant aircraft in the history of aviation, as it was the first all-metal, twin-engine airliner to be designed and built in the UK. It was also the first airliner to be designed with a tail-first landing configuration, which was a innovative feature at the time.

The tail-first landing configuration, also known as a "tail-first" or "tail-down" landing, was a departure from the traditional nose-first landing configuration used by most aircraft. The Albatross's designers believed that this configuration would provide better stability and control during landing, as well as reduce the risk of nose-over accidents.

The DH.91 Albatross made its maiden flight in 1937 and was certified for commercial use in 1938. It was operated by several airlines, including Imperial Airways, which used it to fly passengers and cargo on routes in the UK and Europe.

Although the Albatross was an innovative and groundbreaking aircraft, it ultimately failed to gain widespread popularity due to several factors, including its high operating costs, limited range, and relatively small passenger capacity. The aircraft was also affected by the outbreak of World War II, which led to a significant reduction in commercial air travel and a shift in resources towards military production.

Despite its limited commercial success, the de Havilland DH.91 Albatross remains an important part of aviation history, and its innovative design features paved the way for future aircraft developments.