Bernard 70

Bernard 70 Series
Role Racing and Fighter monoplanes
National origin France
Manufacturer Bernard
First flight 1930 (Bernard 72)
Number built 3

The Bernard 70 was a 1920s design for a French single-seat monoplane fighter aircraft by the Société des Avions Bernard. It was not built but was developed into a racing monoplane designated the Bernard S-72, (later Bernard S-73). It was further developed into single-seat fighters, the Bernard 74 and Bernard 74, although only two of the fighters were built.

Design and development

The Bernard S-72 was a wooden stressed skin constructed cantilever low-wing monoplane powered by a Gnome-Rhône 5Bc[1] radial engine and had a fixed tailskid landing gear.[2] Flown by Paillard the Bernard S-72 participated in the 1930 Coupe Michelin race. On 29 June he took off from Le Bourget, landed successively in Reims, Nancy, Strasbourg, Dijon and Clermont-Ferrand, but unfortunately had to retire near Lyon as a result of engine failure.[1] The S-72 was re-engined with a Gnome-Rhône 7Kb[3] and re-designated the Bernard S-73. The S-73 was then developed into the Bernard 74 single-seat fighter and retained the Titan-Major engine.[2] Two prototypes were built with the first flying in February 1931, powered by a 280hp (kw) Gnome-Rhône 7Kbs radial engine[4], the second was fitted with a 360 hp (268 kW) Gnome-Rhône 7Kd engine and first flew in October 1931.[5] The first prototype 74 was re-engined with a Gnome-Rhône 9Kbrs radial engine and re-designated the Bernard 75 it was later used as a pilot-trainer.[2] No further aircraft were built.

Variants

Bernard 70
Unbuilt design for a single-seat fighter.[2]
Bernard S-72
Single-seater racing monoplane powered by a 240hp (179kw) Gnome-Rhône 5Bc radial engine, first flight in May 1930. Later converted to the Bernard S-73.[2][1]
Bernard S-73[3]
The Bernard 72 re-engined with a 300hp (224kw) Gnome-Rhône 7Kb radial engine, first flown in May 1930.[2][3]
Bernard 74-01
Single-seat fighter variant, powered by a 280hp (209kw) Gnome-Rhône 7Kbs radial engine, later converted to the Bernard 75.[2][4]
Bernard 74-02
A second prototype powered by a 360hp (268hp) Gnome-Rhône 7Kd, first flown on 21 October 1931[5]
Bernard 75
Prototype Bernard 74-01 fighter re-engined with a 500hp (373kw) Gnome-Rhône 9Kbrs radial engine and later used as a pilot-trainer.[2][6]

Specifications (Bernard 74.01)

Data from [4][2]

General characteristics

Performance

Armament

References

Notes

  1. ^ a b c http://www.aviafrance.com/aviafrance1.php?ID=9538&ID_CONSTRUCTEUR=202&ANNEE=0&ID_MISSION=0&MOTCLEF=
  2. ^ a b c d e f g h i Orbis 1985, p. 638
  3. ^ a b c http://www.aviafrance.com/aviafrance1.php?ID=9539&ID_CONSTRUCTEUR=202&ANNEE=0&ID_MISSION=0&MOTCLEF=
  4. ^ a b c http://www.aviafrance.com/aviafrance1.php?ID=9540&ID_CONSTRUCTEUR=202&ANNEE=0&ID_MISSION=0&MOTCLEF=
  5. ^ a b http://www.aviafrance.com/aviafrance1.php?ID=9538&ID_CONSTRUCTEUR=202&ANNEE=0&ID_MISSION=0&MOTCLEF=
  6. ^ http://www.aviafrance.com/aviafrance1.php?ID=9541&ID_CONSTRUCTEUR=202&ANNEE=0&ID_MISSION=0&MOTCLEF=

Bibliography

External links

Aircraft produced by Adolphe Bernard, Société Industrielle des Métaux et du Bois (Ferbois) and Société des Avions Bernard
Adolphe Bernard

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