A Curtiss J.N.4, Jenny, in R.F.C. service. Several hundred Jennies were ordered by the R.N.A.S. in 1914-15.

F5349, the first Handley Page O/400 built in America for the R.F.C., is shown in this photograph being assembled In England.

The Vought V-66E Corsair biplane K3561 was one of a series of American prototypes purchased in Britain for technical evaluation.

Little is known of the history of L7044, a Fairchild F24, procured in America for the use, it is believed, of the British Air Attache in Washington.

Early in World War II this Waco ZVN, P6330, was used at Farnborough to evaluate trycycie undercarriages.

Another unusual type in British markings was K5053, the Northrop 2E attack bomber. It was tested at Martlesham and Farnborough in 1934-35.

A production-type Curtiss H-4, Small America, photographed at Felixstowe. The engines are 100-h.p. Anzanis.

Developed from the HA, the Curtiss H.12, Large America, was one of the best-known and most widely used flying-boats of World War I. This example, with 250-h.p. Rolls-Royce engines, is typical of the operational versions based at Felixstowe and elsewhere.

The prototype Curtiss H.16, a larger version of the H.12. Although ordered in large numbers, the H.16 did not see large-scale service before the end of the war in 1918.

Of the 100 Curtiss R-2 reconnaissance biplanes purchased by the R.N.A.S. only about half a dozen are thought to have become operational. Others were used for training, and, the example illustrated, 3510, for W/T experiments.