In the middle 1920’s Imperial Airways decided to homogenize its float, adopting only multi-engined aircraft. Two new types of trimotors were ordered: the clumsy Argosy and the lovely Hercules. The DH.66 took over initially the Cairo–Baghdad air route, relieving the RAF for running the desert air mail. Powered by 420hp Bristol Jupiter, the Hercules proved to be both elegant and efficient. First flown in 1926 and only built in meagre numbers (just 11), the DH.66’s gave a good account of themselves. Imperial retired them in 1935, but one Australian specimen survived until 1942(!).
Gorgeously self-explanatory poster. Cairo and what looks like the Taj Mahal aren’t sure so close…., specially when those parsimonious biplanes were flying.