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CAUDRON Cr714

 


Technical Specifications
Type
Mono-seat Fighter  with low wings
Date first flight
July 6, 1938
Wingspan
8.97 m
Lenght
8.632 m 
Height
2.802 m
Wing Area
12.5m2 
Empty Weight
1400Kg 
Max. Takeoff Weight
1750 Kg 
Cruising Speed
km/h. 
Maximum Speed
465 km/h at 5000m
Climbing Speed
4000m in 9mn 40s 
Service ceilling
9100m
Range
900kms
Crew
1 Pilot
Motorization
1 Engine Renault 12R-03 of 19L of cylinder capacity12 Inverted V-shaped cylinders of 450hp at 4000m
Armament
4 machine-guns MAC 34 M39 of 7.5mm in the wings

 


Production

The production of the Caudron CR 714 family is as follows:

  • 2 Caudron 710
  • 2 Caudron 713
  • 84 Caudron CR 714 of which 6 will be delivered to Finland which will not know what to do with a plane so inefficient ...
  • 1 Caudron CR 760
  • 1 Caudron CR 770

Historical

The Caudron CR714 was conceived around the concept of the "Light Figher". The CR714 is a direct descendant of the glorious record aircraft of the brand. The first model C710 with fixed train, studied by the team of Maurice DEVLIEGER, was presented in 1934, in response to the program C1 (renewal of the fightert) in the category light fighter. The C710, which flew for the first time on July 10, 1936, was rejected because of its too limited performance: 460 km / h in level. It is quickly followed by the CR713 "Cyclone". The design is identical to the C710, this time it owns a retractable gear and a redesigned drift. It flew for the first time in December 1937. Only Russia was interested in this CR713, as well as the C710. (See chapter version)

Caudron continues the development of the Caudron fighter, and presents the CR714, very similar to the CR713, flying for the first time on July 6, 1936. The tests continue (see chapter version) while the first orders arrive in November 1938: 20 exemplary and 180 optional. The Air Force saw in this aircraft a double interest: it did not use the Hispano Suiza 12Y-31 engine of the D520 and MS 406 in particular, and used non-strategic materials. It is mostly made of wood, with a wing made of plywood and only a few Magnesium fairings are used on the fuselage. The CR714 quickly revealed its major weaknesses: sub-motorized, and weighed down by the latest military reinforcements and equipment, its performance is mediocre, while its arming of 4 machine guns of 7.5 mm in the wings under fairings, is much too weak. The Air Force decided to block the manufacture of the 90th aircraft, and to reserve part of the exemplary already manufactured in Finland.

The delivery started slowly, with the commissioning of 9 aircraft in March 1940. Six of them were delivered to Finland which withdrew them from service in March 1941 ... This is one of them, N � 5 (registered C-553), which after many journeys is being restored, and may be presented one day at the Museum of Air and Space

The CR714 were first assigned to the DIAP (Polish Aviation Training Depot) and the GCMP (Polish fighter and walking group) for training aircraft, before going to equip the new GC I / 145 " Warsaw ". This group is initially, assigned to the defense of Lyon, before being moved on the ground of Villacoublay. In spite of problems of reliability, a lack of qualified personnel and spare parts, the group aligned to May 24, 1940, about thirty machines including eight operational.

The Polish pilots were able to make the most of this poorly performing product. The speed of the CR714 did not allow them to catch up with the German bombers, but they managed to shoot down 8 enemy planes for the loss of 4 pilots. On the evening of June 11, 1940, there remained only 11 CR714 within the group, which finally perceived Bloch 152 and Morane 406.

Better motorized versions have been studied but have not yet been put into service: the Cr760, a transition aircraft equipped with an Italian Fraschini engine, until the new Renault 626 engine is available. Described in the "Versions" chapter.

When the Germans grab the aircfield of Guyancourt, where its based the workshops of the manufacturer, they seize about twenty plane which will serve as lure on airfields. The units present in the Free Zone will be reformed at the end of 1941.

The Caudron firm was known before the war for these magnificent racing planes, its prestigious pilots, of which Hélène Boucher, tragically disappeared, but Caudron 714 demonstrated that it was impossible to transform a "Racer" into a fighter plane. Military equipment weighs down the cell and penalizes performance: the concept of the light motorized fighter is a failure.

 


Versions

Caudron CR 710
The first version of the series, the Caudron 710 is equipped with a 450 hp Renault 12R-01 engine. It made its first flight on July 10, 1936. Following the tests, the rudder is redesigned and enlarged to improve the longitudinal stability. This lightweight but sub-motorized aircraft reaches 460km / h. It is "armed" with 2 dummy guns of 20mm. The prototype was registered "FW-211" and was unveiled to the public during the "Villacoublay Air Festival" on July 18th, 1937. Three exemplary were built, including the No. 7871 manufactured to meet a request from the Soviets interested in the aircraft, which fell quickly in view of the poor performances of the C710, notably the speed of climb ... This plane will be captured by the Germans in Orléans-Bricy.
Caudron CR 713
The Caudron CR 713 is studied in parallel with the C710, to propose a model with internal gear. The C710 n � 01 having disappeared at the end of 1937, it is probable that its cell served as base for the first Caudron C713. The climb performance is barely better than the C710, and the level of speed is lower than the new Air Force requirements (520 km / h). The first flight took place on December 14th, 1937. The Soviets were still interested, but the tests continued with modifications of forms of rudder. During one of these tests, the pilot Maurice DUCROS crashes and is killed. One of the C713s is finally transferred to Russia, but crashes at the first landing. Repaired, it is quickly abandoned.
Caudron CR 714

Directly derived from the C713, the Caudron CR714 differs by the shape of its hood and its rudder. It makes its first flight on 6 July 1938. It reaches 480km / h and is armed with 4 machine guns of 7.5mm. The airplane, very stable thanks to its large rear overhang, is a good shooting platform. The tests continue with the adoption of a new Ratier propeller, a heightened shock absorber train, and a shield plate behind the pilot. The airframe is reinforced at the level of the aileron and wing spars: the heavy aircraft now weighs 1880 kg and its speed dropped to 470 km / h, while it takes 12 minutes to climb to 5000m. The aircraft is completely overtaken when it is put into service.

Caudron CR 760
Renault is rapidly studying a more powerful engine for its Caudron 714. In order to wait until the arrival of the Renault 626 engine, Caudron turns to the Italian company Fraschini for the DELTA RC-40 12 cyl. Of 730 hp for a cylinder capacity of 21 liters The Caudron thus equipped becomes the Caudron C760. Unlike the C714, its structure is made of metal tubes. The arming is composed of 6 machine guns of 7.5mm under fairing. His first flight took place on April 6, 1940, and the performances were excellent: 570 km / h in level, the 4000m reached in 5 minutes. At the end of May 1940, he was evacuated to Orléans-Bricy. Is captured by the Germans. It will ultimately serve as a lure on the false airfield of Epieds en Bauce
Caudron CR 770
The CR770 is fitted with the new Renault 626 16-cylinder V-engine. The engine is developed in record time, one month, and includes many parts of the 12 R-01. It is planned to give 800 ch. Externally, the CR770 differs from the CR760 by its exhaust placed in the lower part of the hood. The first flight took place on November 10, 1939. but was very brief: the engine, due to lack of focus, hangs after 10 Flying minutes only: Crankshaft tightened due to insufficient lubrication. The CR770 is abandoned

 


Bibliography

1 ) _ Editions LELA PRESSE ; Hors série "Avions"
- "Les Chasseurs Caudron et Dérivés"
From Matthieu COMAS / Michel LEDET

 

2 ) _ Editions DOCAVIA
- No 43 : "Les Avions CAUDRON RENAULT"
From Edouard MIHALY / Harry ROBINSON

 

3 ) _ Collection Histoire de l'Aviation
- No12 : "Les Avions Caudron" Tome 2
From André Hauet

4 ) _ Mushroom Model Publications
- Caudron CR714 C1 Cyclone : the ultimate story"
From BELCARZ / RYS / STENMAN

 


Photos Album

 


Drawing 3 views


Sources

- Book : Special edition"Avions" "Les Chasseurs Caudron et Dérivés" From Matthieu COMAS / Michel LEDET - Editions LELA Presse
- ...