This two-engine aircraft was built by the French Potez company to fulfill a 1932 specification for a new reconnaissance bomber. Built as a private venture, this aircraft, designated the Potez 54, flew for the first time on 14 November 1933. Designed by Louis Coroller, it was intended as a four-seat aircraft capable of performing duties such as bomber, transport and long-range reconnaissance. The Potez 54 was a high-wing monoplane, of mixed wood and metal covering over a steel tube frame. The prototype had twin fins and rudders, and was powered by two 515kW (690hp) Hispano-Suiza 12Xbrs V-12 engines in streamlined nacelles, which were connected to the fuselage by stub wings. The main landing gear units retracted into the nacelles, and auxiliary bomb racks were mounted beneath the stub wings. There were manually operated turrets at the nose and dorsal positions, as well as a semi-retractable dustbin-style ventral turret. During development, the original tailplane was replaced by a single fin and rudder, and in this form, the type was re-designated the Potez 540 and delivered to the Armee de I'Air on 25 November 1934.[1] A total of 192 Potez 540s were built.
Their first combat was in the Spanish Civil War, where they were employed by the Spanish loyalist side. A poor design that was already obsolete just two years after its introduction, when confronted by the higher performance German and Italian planes of the same period, the Potez 540 proved itself a failure in Spanish skies during the Civil War and was labelled as 'Flying Coffin' (Spanish: Ataúd Volante) by Spanish Republican pilots.[2] In the late 1930s, these aircraft were becoming obsolete so they were withdrawn from reconnaissance and bombing duties and were relegated to French transport units. They were also employed as paratrooper training and transport aircraft. By September 1939 and the beginning of World War II, they had been largely transferred to the French colonies in North Africa, where they continued to function in transport and paratrooper service. Their role in even these secondary assignments was problematic given their poor defensive armament and vulnerability to modern enemy fighters. Following the French capitulation to Germany in June 1940, those Potez 540s still flying served the Vichy French Air Force mainly in the French overseas colonies. Most of these machines were retired or destroyed by late 1943.
Potez 54
One prototype, later converted (with twin tails) into the Potez 540 No. 1.
Potez 540
Production aircraft with 1 each of 590kW (790hp)Hispano-Suiza 12Xirs and 12Xjrs, (left and right hand rotation), V-12 inline engines. 185 built. Used by France and Spain.
Derivative of 540 powered by 540kW (720hp)Lorraine 12Hfrs Pétrel V-12 engines. 74 built. Used by France and Spain.
Potez 543
Production derivative of Potez 541, powered by 640kW (860hp)Gnome-Rhône 14Kdrs radial engines. 10 built for Romania, only eight were delivered and four were diverted to Spain for use by Spanish Republicans.
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Cortet, Pierre & Coroller, Jean-Louis (January 1996). "Le Potez 540 (2e partie)". Avions: Toute l'aéronautique et son histoire (in French) (34): 17–22. ISSN1243-8650.
Cortet, Pierre & Coroller, Jean-Louis (February 1996). "Le Potez 540 (3e partie)". Avions: Toute l'aéronautique et son histoire (in French) (35): 28–34. ISSN1243-8650.
Cortet, Pierre & Coroller, Jean-Louis (March 1996). "Le Potez 540 (4e partie)". Avions: Toute l'aéronautique et son histoire (in French) (36): 7–10. ISSN1243-8650.
Cortet, Pierre & Coroller, Jean-Louis (April 1996). "Le Potez 540 (5e partie)". Avions: Toute l'aéronautique et son histoire (in French) (37): 10–16. ISSN1243-8650.
Cortet, Pierre & Coroller, Jean-Louis (September 1996). "Le Potez 540/542 (dernière partie)". Avions: Toute l'aéronautique et son histoire (in French) (42): 7–13. ISSN1243-8650.
Cortet, Pierre & Coroller, Jean-Louis (July 1996). "Le Potez 542 (2ème partie)". Avions: Toute l'aéronautique et son histoire (in French) (40): 19–22. ISSN1243-8650.
Cortet, Pierre & Coroller, Jean-Louis (August 1996). "Le Potez 54 au service de l'Espagne Républicaine" [The Potez 54 in Spanish Republican Service]. Avions: Toute l'aéronautique et son histoire (in French) (41): 15–18. ISSN1243-8650.
Ledet, Michel (June 1996). "Le Potez 542 (1ère partie)". Avions: Toute l'aéronautique et son histoire (in French) (39): 28–32. ISSN1243-8650.
Mombeek, Eric (May 2001). "Les trésors de Cazaux" [The Treasures of Cazaux]. Avions: Toute l'Aéronautique et son histoire (in French) (98): 44–47. ISSN1243-8650.
Morareau, Lucien (May 1996). "Les Potez 54 de la Marine" [The Naval Potez 54s]. Avions: Toute l'aéronautique et son histoire (in French) (38): 20–22. ISSN1243-8650.