The Hispano-Suiza 8 is a water-cooled V8 SOHC aero engine introduced by Hispano-Suiza in 1914 that went on to become the most commonly used liquid-cooled engine in the aircraft of the Entente Powers during the First World War. The original Hispano-Suiza 8A was rated at 140 hp (100 kW) and the later, larger displacement Hispano-Suiza 8F reached 330 hp (250 kW).
The Breguet 19 was a sesquiplane bomber and reconnaissance aircraft which was also used for long-distance flights and was designed by the French Breguet company and produced from 1924.
The Nieuport-Delage NiD 52 was a French fighter aircraft of the 1920s. A single-engined sesquiplane, it served with the Spanish Air Force, being operated by both sides of the Spanish Civil War.
The PZL P.1 was a Polish fighter, designed by the engineer Zygmunt Puławski, manufactured by the PZL state-owned factory. It remained a prototype, but it was the first of the Polish PZL gull wing fighter series, leading to the PZL P.7, PZL P.11 and PZL P.24.
The Dewoitine D.1 was a French single-seat fighter aircraft of the 1920s, built by the French industrial company Dewoitine.
The Morane-Saulnier MS.230 aircraft was the main elementary trainer for the French Armée de l'Air throughout the 1930s. Almost all French pilots flying for the Armée de l'Air at the outbreak of World War II had had their earliest flight training in this machine. It was the equivalent of the Stearman trainer in the United States air services and the de Havilland Tiger Moth in the British Royal Air Force.
The Gourdou-Leseurre GL.30 was a racing aircraft built in France in 1920 which formed the basis for a highly successful family of fighter aircraft based on the same design.
The Lioré et Olivier LéO H-13 was a French biplane two-engine flying boat of the 1920s, built in passenger and military variants.
The SIAI S.52 was an Italian fighter prototype of 1924.
The Tebaldi-Zari was an Italian fighter prototype of 1919. The Breda company later acquired the rights to it.
The Fokker D.IX was a Dutch single seat, single engine fighter aircraft, the final, more powerful evolution of the Fokker D.VII World War I success, flown in 1921. The sole example was purchased by the US Army Air Service but not developed further.
The Romano R.90 was a prototype single-seat French floatplane fighter of the 1930s. A single example of the R.90 was built, but the type did form the basis of the Romano R.83 and Romano R.92 fighters which were built in secret for the Spanish Republicans during the Spanish Civil War.
The Hispano-Suiza E-34, later renamed Hispano HS-34, was a Spanish single engine, tandem seat biplane, designed as a basic trainer. Twenty five were ordered by the Aeronáutica Naval, but only five had been completed when the Spanish Civil War intervened.
The Dewoitine D.30 was a ten-seat cantilever monoplane built in France in 1930. The D.30 was a single-engine aircraft but the second was completed as a trimotor and redesignated D.31.
PZL P.8 was a Polish fighter aircraft designed by Zygmunt Puławski, from the family of fighters with Polish wing, developed and produced by Państwowe Zakłady Lotnicze (PZL) in the early 1930s.
The TNCA Series C Microplano was a single-engine, single-seat fighter designed and built in Mexico during World War I.
The Wibault 9 or Wib 9 was a single seat, parasol wing fighter aircraft designed and built in France in the 1920s. It was a re-engined version of the relatively successful Wib 7, but failed to reach production.
The AME VI was a reconnaissance aircraft, produced in Spain in the mid 1920s.
The Caudron C.97 was a two-seat biplane trainer designed and built in France around 1924. A number were used by the Bolivian Air Force.
The Hanriot H.34 was a basic trainer designed in France in 1924 which did not reach production. It was a parasol wing aircraft, seating two in tandem.
