The D.513 was a single-seat low-wing cantilever monoplane fighter that first flew on 6 January 1936.^[1] The D.513 was powered by an 860 hp (641 kW) Hispano-Suiza 12Ycrs1 V-12 piston engine and had a retractable tailwheel landing gear.^[1] Testing proved that the D.513 was unstable and not able to reach the expected speeds and it was rebuilt with a new fuselage and a modified tail unit.^[1] The changes did not improve the stability or the maximum speed and problems were also found in the engine cooling and landing gear, and further development was halted.^[1] The second prototype was modified with landing gear and a radiator from the D.503. It was redesignated the D.514LP and was used in high-speed parachute trials.^[1]

D.513

Prototype with an 860 hp (641kW) Hispano-Suiza 12Ycrs1 V-12 piston engine.^[1]

D.514

Originally intended as the second D.513, it was modified for trials including the fitting of a Hispano-Suiza 12Ydrs2 V-12 engine.^[1]

  France

• French Air Force

Data from ^[1]

General characteristics

• Crew: one
• Length: 7.45 m (24 ft 5 in)
• Wingspan: 12.05 m (39 ft 6 in)
• Wing area: 18.32 m² (197.2 sq ft)
• Max takeoff weight: 2,446 kg (5,393 lb)
• Powerplant: 1 × Hispano-Suiza 12Ycrs1 V-12 piston engine, 640 kW (860 hp)

Performance

• Maximum speed: 445 km/h (277 mph, 240 kn) at 5100m (16730 ft)
• Climb to 2000m (6560ft) in 2 minutes 35 seconds.

• Bombeau, Bernard (September 2023). "Dewoitine D. 513: Le chaînon manquant (1)" [Dewoitine D. 513: The Missing Link, Part 1]. Le Fana de l'Aviation (in French) (646): 60–71. ISSN 0757-4169.
• Bombeau, Bernard (October 2023). "Dewoitine D. 513: Le chaînon manquant (2)" [Dewoitine D. 513: The Missing Link, Part 2]. Le Fana de l'Aviation (in French) (647): 66–77. ISSN 0757-4169.
• The Illustrated Encyclopedia of Aircraft (Part Work 1982-1985). Orbis Publishing.