[1] They were produced as a response to a requirement by the Belgian Air Force,[3] which became their biggest user, although private owners also bought a small number.

[3] Stampe et Vertongen contracted Alfred Renard to provide a design, and for the sake of expediency, suggested that he submit a revision of his RSV.32 rather than create an entirely new aircraft.

[4] However, the fuselage was reinforced to accommodate engines of up to 150 kW (200 hp),[3] the undercarriage legs were fitted with thicker bungee cords,[3] and the pilot's and instructor's seats were now placed in two separate cockpits in tandem.

[3] The firm was reluctant to accommodate the change, as the Hispano-Suiza engines and cooling systems were heavier than their Minerva counterparts, and had not only obsolete technology but were already used and worn-out.

[6] Other problems with the type were due to the second-hand engines, which suffered continual mechanical breakdowns[7] and by the early 1930s had contributed to a long list of accidents.

[8] To investigate a solution to the ongoing situation, the air force returned the RSV.26/140 prototype to the factory to be fitted with an Armstrong Siddeley Lynx engine.