The Hoopoe was a private venture naval fighter that first flew in 1927 and went through many changes before it was sent for service trials in 1932. By then progress had overtaken it and the Hawker Nimrod became the FAA's preference. The photo shows the Hoopoe in its 1929 configuration with an Armstrong-Siddeley Jaguar engine in place of the original Bristol Mercury and single-bay wings in place of two-bay wings. The Jaguar engine was later replaced with an Armstrong Siddeley Panther. N237 was scrapped in 1932. Photo from: Imperial War Museums

Entering service in January 1916, the nimble Nie 11 fighter put an end to the 'Fokker Scourge', outclassing the Fokker Eindecker in every respect expect that its machine gun could not fire through the arc of the propeller. Photo from: Nederlands Instituut voor Militaire Historie

Built in 1928 as a CH-300, then restored and fitted with 420 h.p. P&W Wasp engine to CH-400 standard. Painted to represent the prewar record breaking Bellanca WB-2 NX237 with the "New York - Berlin" titles and number 140 it carried during its failed transatlantic flight on 4-6 June 1927. It never reached Berlin but landed at Eisleben, Germany instead. The smaller titles on the rear fuselage read "Brooklyn Chamber of Commerce", which organised this transatlantic challenge.