Caudron C.714

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(Redirected from Caudron-Renault CR.770)
C.714
Caudron CR.714 fighter plane of Groupe de Chasse I/145, June 1940
Role Fighter
Manufacturer Caudron-Renault
Designer Marcel Riffard
First flight 18 July 1936 (C.710)
Introduction 1940
Retired 1941 (Finland)
Primary users Polish Air Force in France
French Air Force
Finland
Produced 1939–1940
Number built approximately 90
Caudron C.713
Caudron C.720 photo from Le Pontentiel Aérien Mondial 1936

The C.710 were a series of light fighter aircraft developed by Caudron-Renault for the French Air Force just prior to the start of World War II. One version, the C.714, saw limited production, and were assigned to Polish pilots flying in France after the fall of Poland in 1939. A small number was also supplied to Finland.

Design and development[edit]

The original specification that led to the C.710 series was offered in 1936 in order to quickly raise the number of modern aircraft in French service, by supplying a "light fighter" of wooden construction that could be built rapidly in large numbers without upsetting the production of existing types. The contract resulted in three designs, the Arsenal VG-30, the Bloch MB.700,[1] and the C.710. Prototypes of all three were ordered.

The original C.710 model was an angular design developed from an earlier series of air racers. One common feature of the Caudron line was an extremely long nose which set the cockpit far back on the fuselage. The nose housed the 336 kW (450 hp) Renault 12R-01, a supercharged inverted and air-cooled V-12 engine that resulted from putting together two 6Q engines.[2] The aircraft was a monoplane of all-wooden construction. It had a fixed and spatted landing gear, and the vertical stabilizer was a seemingly World War I-era semicircle instead of a more common trapezoidal or triangular design.[3] Armament consisted of a 20 mm Hispano-Suiza HS.9 cannon under each wing in a small pod, with 60 rounds per gun.[4][5]

The C.710 prototype first flew on 18 July 1936.[5] The C.710 demonstrated a speed of 455 km/h (283 mph; 246 kn) at 4,000 m (13,000 ft),[6][5] but the Morane-Saulnier M.S.405 was finally selected instead, mainly due to its superior rate of climb.[4] The prototype C.710 was destroyed in a crash on 1 February 1938.[5]

The C.711 was a proposed racing aircraft which was not built and the C.712 was a version intended to break the World Air Speed Record.[7] It used the fuselage of the C.710 with the wing of the Caudron C.580, while its Renault 613 engine, although basically the same as that of the C.710, had its power increased to 750 hp (560 kW) by increasing compression, allowing the use of 100 Octane fuel.[8] The C.712 made its first flight on 24 December 1936,[9] but was destroyed in a crash at Istres on 29 April 1937 during a record attempt.[10] The C.713, which flew on 15 December 1937, was a modified fighter which introduced retractable landing gear and a more conventional triangular vertical stabilizer.[5]

The final evolution of the 710 series was the C.714 Cyclone, a variation on the C.713 which first flew in April 1938 as the C.714.01 prototype. The primary changes were a new wing airfoil section, a strengthened fuselage, and, instead of two cannons, four 7.5 mm MAC 1934 machine guns in the wing fairings. It was powered by the newer 12R-03 version of the engine, which introduced a new carburettor that could operate in negative g.

The French Air Force ordered 20 C.714s on 5 November 1938, with options for a further 180. Production started at the Renault factory in the Paris suburbs in summer 1939.[11]

Other projected versions were the C.720 trainer with a 75 or 164 kW (100 or 220 hp) engine, the C.760 fighter with a 559 kW (750 hp) Isotta-Fraschini Delta engine, and the C.770 fighter with a 597 kW (800 hp) Renault V-engine. None of these reached production.

Operational history[edit]

A Finnish C.714

Deliveries did not start until January 1940. After a series of tests with the first production examples, it became apparent that the design was seriously flawed. Although light and fast, its wooden construction did not permit a more powerful engine to be fitted. The original engine seriously limited its climb rate and maneuverability with the result that the Caudron was withdrawn from active service in February 1940. In March, the initial production order was reduced to 90, as the performance was not considered good enough to warrant further production contracts. Eighty were diverted to Finland to fight in the Winter War. These were meant to be flown by French pilots.

However, events in France resulted in only six aircraft being delivered, and an additional ten were waiting in the harbour when deliveries were stopped. The six aircraft that arrived were assembled, tested and given registrations CA-551 to CA-556. The aircraft were found to be too unreliable and dangerous to use in Finnish conditions, and were not committed to combat. Two of the aircraft were damaged during a transport flight to Pori. Further, the Finnish pilots found that it was difficult to start and land the aircraft from the air bases at the front. The aircraft were maintained on the roster until they were retired and scrapped on 30 December 1949. One example, CA-556 was transferred to the maintenance personnel school as an instructional airframe.[12]

On 18 May 1940, 35 Caudrons were delivered to the Polish Warsaw Squadron, the Groupe de Chasse polonais I/145, stationed at the Mions airfield. After just 23 sorties, adverse opinion of the fighter was confirmed by frontline pilots who expressed concerns that it was seriously underpowered and was no match for contemporary German fighters.

On 25 May, only a week after it was introduced, French Minister of War Guy La Chambre ordered all C.714s to be withdrawn from active service. However, since the French authorities had no other aircraft to offer, the Polish pilots ignored the order and continued to fly the Caudrons. Despite flying a fighter hopelessly outdated compared to the Messerschmitt Bf 109E, the Polish pilots scored 12 confirmed and three unconfirmed victories in three battles between 8 June and 11 June, losing nine in the air and nine more on the ground. Among the aircraft shot down were four Dornier Do 17 bombers, and also three Messerschmitt Bf 109 and five Messerschmitt Bf 110 fighters.

The Caudron fighter was also used by the Polish training squadron based in Bron near Lyon. Although the pilots managed to disperse several bombing raids, they did not score any kills; but they did not lose any aircraft either. By the end of June when France fell, only 53 production machines had been delivered (although the number varies, 98 is another common figure).

Operators[edit]

Caudron CR.714 fighter plane of Groupe de Chasse I/145, June 1940
 Finland
 France
 Poland

Survivors[edit]

One full CR.714 airframe as well as one additional fuselage were preserved in Finland. The fuselage was offered back to the Musée de l'Air et de l'Espace where, as of 2015, it is currently undergoing restoration.[13]

Specifications (Caudron C.714)[edit]

Data from The Complete Book of Fighters,[14] Aviafrance : Caudron C.714[15]

General characteristics

  • Crew: 1
  • Length: 8.63 m (28 ft 4 in)
  • Wingspan: 8.97 m (29 ft 5 in)
  • Height: 2.87 m (9 ft 5 in)
  • Wing area: 12.5 m2 (135 sq ft)
  • Empty weight: 1,395 kg (3,075 lb)
  • Gross weight: 1,880 kg (4,145 lb)
  • Powerplant: 1 × Renault 12R-03 V-12 air-cooled inverted piston engine, 370 kW (500 hp)
  • Propellers: 3-bladed variable-pitch propeller

Performance

  • Maximum speed: 455 km/h (283 mph, 246 kn) at 4,000 m (13,000 ft)
467 km/h (290 mph; 252 kn) at 5,000 m (16,000 ft)
  • Range: 900 km (560 mi, 490 nmi) at 320 km/h (200 mph; 170 kn)
  • Service ceiling: 9,100 m (29,900 ft)
  • Time to altitude: 4,000 m (13,000 ft) in 9 minutes 40 seconds

Armament

  • Guns: 4 × 7.5 mm (0.295 in) MAC 1934 machine guns

See also[edit]

Aircraft of comparable role, configuration, and era

Related lists

References[edit]

Notes[edit]

  1. ^ "MB 700: origins, characteristics and performance data". Dassault Aviation, a major player to aeronautics. Retrieved 25 May 2019.
  2. ^ "The engine of the Caudron CR.714". Ailes Anciennes Le Bourget (in French). Retrieved December 4, 2017.
  3. ^ Mihaly May 1972, p. 2
  4. ^ a b Mihaly May 1972, p. 3
  5. ^ a b c d e Green and Swanborough 1994, p. 111.
  6. ^ Mihaly July 1972, p. 7
  7. ^ Green 1960, p. 39
  8. ^ Robinson 1976, pp. 8–9
  9. ^ Robinson 1976, p. 9
  10. ^ Robinson 1976, pp. 11–12
  11. ^ Green 1960, pp. 39–40.
  12. ^ Stockton, Harold E. Jr. (8 October 1998). "Under French Skies". lonestar.texas.net. Snow Leopard Productions. Archived from the original on 5 May 2008. Retrieved 25 May 2019.
  13. ^ Frikke, Erik. "Caudron CR.714 Cyclone, CA-556 / 8538/6, Polish Aviation Museum". abpic.co.uk. Retrieved 25 May 2019.
  14. ^ Green and Swanborough 1994, p. 112.
  15. ^ Parmentier, Bruno (15 November 1998). "Caudron C.714". Aviafrance (in French). Retrieved 25 May 2019.

Bibliography[edit]

  • Angelucci, Enzo. The Rand McNally Encyclopedia of Military Aircraft, 1914–1980. San Diego, California: The Military Press, 1983. ISBN 0-517-41021-4.
  • Belcarz, Bartłomiej. GC 1/145 in France 1940. Sandomierz, Poland/Redbourn, UK: Mushroom Model Publications, 2002. ISBN 83-917178-1-X.
  • Belcarz, Bartłomiej. Morane MS 406C1, Caudron Cyclone CR 714C1, Bloch MB 151/152 (Polskie Skrzydła 2) (in Polish). Sandomierz, Poland: Stratus, 2004. ISBN 83-89450-21-6. (This book recounts the use of the CR.714 by Polish Pilots of the French Air Force.)
  • Breffort, Dominique and André Jouineau. French Aircraft from 1939 to 1942, Volume 1: from Amiot to Curtiss. Paris: Histoire & Collections, 2004. ISBN 2-915239-23-1.
  • Brindley, John F. French Fighters of World War Two, Volume One. Windsor, UK; Hylton Lacy Publishers Ltd., 1971. ISBN 0-85064-015-6.
  • Franco, Charles; Lanowski, Witold (December 1972). "J'ai piloté le Caudron C.714.C1" [I Flew the Caudron C.714.C1]. Le Fana de l'Aviation (in French). No. 39. pp. 28–29. ISSN 0757-4169.
  • Green, William. War Planes of the Second World War, Fighters, Volume One. London: Macdonald & Co.(Publishers), 1960. ISBN 0-356-01445-2.
  • Green, William and Gordon Swanborough. The Complete Book of Fighters. New York: Smithmark, 1994. ISBN 0-8317-3939-8.
  • Gretzyngier, Robert and Wojtek Matusiak. Polish Aces of World War II. Oxford, UK: Osprey Publishing., 1998. ISBN 1-85532-726-0.
  • Keskinen, Kalevi, Kari Stenman and Klaus Niska. Suomen Ilmavoinen Historia 4: Morane-Saulnier M.S. 406/Caudron C.714 (in Finnish). Helsinki, Finland: Tietoteos, 1975. ISBN 951-9035-19-2.
  • Kotelnikov, V.; Kulikov, V. & Cony, C. (November 2001). "Les avions français en URSS, 1921–1941" [French Aircraft in the USSR, 1921–1941]. Avions: Toute l'Aéronautique et son histoire (in French) (104): 37–43. ISSN 1243-8650.
  • Mihaly, Edouard (May 1972). "Les chasseurs legers Caudron-Renault (1)" [The Caudron-Renault Light Fighters, Part 1]. Le Album de Fanatique de l'Aviation (in French). No. 33. pp. 2–6. ISSN 0757-4169.
  • Mihaly, Edouard (June 1972). "Les chasseurs legers Caudron-Renault (2)". Le Album de Fanatique de l'Aviation (in French). No. 34. pp. 2–7. ISSN 0757-4169.
  • Mihaly, Edouard (July 1972). "Les chasseurs legers Caudron-Renault (3)" [The Caudron-Renault Light Fighters, Part 3]. Le Album de Fanatique de l'Aviation (in French). No. 35. pp. 2–7. ISSN 0757-4169.
  • Pelletier, Alain. French Fighters of World War II in Action (Aircraft Number 180). Carrollton, Texas: Squadron/Signal Publications, Inc., 2002. ISBN 0-89747-440-6.
  • Robinson, Pierre (April 1976). "Caudron 712, le pur-sang abattu par les cailloux de la craux" [Caudron 712: The Thoroughbred Slaughtered by Pebbles from Craux]. Le Fana de l'Aviation (in French). No. 77. pp. 8–12. ISSN 0757-4169.

External links[edit]

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