Against this background the brothers' decision to enter the 1934 MacRobertson Air Race between England and Australia seems ambitious, but they came surprisingly close to achieving their goal with the Evo III.
Later that year (1934), the DC-2 crashed near Rutbah Wells, (now known as Ar Rutba, Iraq), and is now commemorated by a flying replica.
In 1934, to enable him to compete in the England-Australia MacRobertson Air Race, Stack together with Sidney Lewis Turner had a specially modified long-range version of the Airspeed Envoy built.
In 1934 Lt. Murray B. Dilley purchased the aircraft and production rights from Claire Vance's estate for $10,000 with the intention of racing the aircraft in the 1934 England-Australia MacRobertson Air Race.
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