The R-6 was larger than the earlier Gee Bee racers, but still seems an uncomfortable choice for the 18,000 km London to Melbourne Air Race. Jacqueline Cochran and Wesley Smith Pratt only got as far as Bucharest where they damaged it. Q.E.D. participated in other races but never finished one. In 1938 it was sold to Mexican pilot Francisco Sarabia as XB-AKM and renamed Conquistador del Cielo. Sarabia crashed it at New York - La Guardia in 1939 and drowned. The aircraft was restored and is preserved in his home town, Ciudad Lerdo. Photo from: San Diego Air & Space Museum
This 320 was first delivered to Air 2000 in November 2001 as G-OOAT. For many years, as C-GTDH, it shuttled between flying Canadians to the Carribean with Skyservice in the Northern Hemishere winter months, and flying Brits to the Med/etc. during the summer months.with First Choice and then Thomson. From July 2012 it went to saga airlines in Turkey as TC-SGN, with lease periods to Onur and Ghadames. It was wfu and ferried to Kemble for storage but in February 2014 it went to Monarch as G-ZBAP but, after the airline's demise, was was ferried to St. Athan and scrapped in July 2018.