Duverne-Saran 01

Last updated
Duverne-Saran 01
Role3 seat, twin engine light civil aircraft
National origin France
First flight23 April 1935
Number built1

The Duverne-Saran 01 was a twin engine, three seat touring aircraft built in France in the mid-1930s. Only one was completed.

Contents

Design

The Duverne-Saran 01 was designed to carry a pilot and two passengers rapidly but economically with the extra security provided by two engines. It was a wooden aircraft with a low, cantilever wing set with about 6° of dihedral. The wing was in three parts, with a short span, constant chord centre section and two straight-tapered, square-tipped outer panels. Long ailerons on the outer panels occupied about 60% of the span. There were split flaps on either side of the ailerons. Structurally the wings had a box spar, shaping the section and plywood covered; the section aft of the box was formed by ribs and was fabric covered. [1]

The Duverne-Saran 01's engines were mounted from the wing at the junctions between the centre section and outer panels. [1] The 30 kW (40 hp) Chaise 4-E engines were air-cooled, inverted V-4s with a narrow angle between the cylinders, so were unusually compact. [1] [2] The propeller shafts were at wing level, with the bulk of the engine and cowlings ahead and below the wing. [1]

Its fuselage was built around four spruce longerons and was rectangular in section. The extreme nose was a duralumin dome, the central region was ply covered and fabric covered the tapering rear section. Its three seats were in tandem, with the pilot in front over the wing leading edge, a passenger behind over the centre of gravity and a third seat, which could be fitted with dual control, in the rear. A windowed cabin top was envisaged but does not appear in the few published photographs of the Duverne-Saran, so it may not have been fitted. The fuselage design made it easy to modify; for example, a hinged panel in the side could admit patients on a stretcher. [1]

The tail was conventional with a trapezoidal tailplane mounted on the upper fuselage carrying rectangular elevators. The angle of incidence of the tailplane could be adjusted in flight for trim but the elevators were not balanced. The Duverne-Saran had a triangular fin and rectangular balanced rudder. [1]

It had a fixed tailskid undercarriage with mainwheels on faired half-axles from the bottom of the fuselage, with short, faired, rubber ring shock absorbers from the outer lower engine mounts. [1]

Development

The Duverne-Saran 01, prototype and only example of the type, flew for the first time on 23 April 1935. [3] It was one of sixteen prototypes that took part in a 2,140 km (1,330 mi), ten-day tour around France which started at Orly on 18 October 1935. [4]

On 28 April 1936 it arrived at Villacoublay for its official trials. [5] At that time it still had the Chaise engines but by March 1937 these had been replaced with 45 kW (60 hp) Train 6T straight six cylinder, inverted, air-cooled engines. [6] It first flew with these early in May 1937 [7] and trials continued until at least October. [8]

In December 1937 it changed engines again, with the installation of smaller, 30 kW (40 hp) Train 4Ts, similar to the 6Ts but with four cylinders, in order to make record attempts in the low power category. [9]

A year later, in December 1938 the Duverne-Saran had begun tests powered by two 52 kW (70 hp) air-cooled [Minié 4.D0 Horus flat fours. [10] [11]

Specifications (Chaise engine)

Data from Les Ailes 26 September 1926 [1]

General characteristics

Performance

Related Research Articles

Potez 40 French three engine, braced high wing monoplane

The Potez 40 was a French three-engine, braced high-wing monoplane designed and built in response to a French government programme for colonial transport and policing aircraft duties.

Caudron C.140

The Caudron C.140 was a French tandem cockpit sesquiplane designed in 1928 as a combination of liaison aircraft and observer and gunnery trainer.

Caudron C.67

The Caudron C.67 was a simple single seat biplane with a low powered engine. It was built and flown in France in 1922.

Albessard Triavion

The Albessard Triavion, sometimes known as the Peyret-Albessard Triavion, was a three surface aircraft, combining a tandem wing and conventional tailplane.

The S.E.C.A.T.-VI La Mouette or S.E.C.A.T. 60T La Mouette was a French two seat tourer built shortly before the outbreak of World War II.

Delanne 20-T 1938 experimental aircraft by Maurice Delanne

The Delanne 20-T was a French tandem wing aircraft designed as an aerodynamic model for a larger fighter aircraft. It was tested during 1939.

SFCA Maillet 20

The SFCA Maillet 20 was a French three seat tourer built in 1935. The Armée de l'Air ordered 30 for training and liaison and several were raced. The aircraft was developed through 1935 via cockpit layout and canopy changes to the provision of retracting landing gear.

SFCA Lignel 20

The SFCA Lignel 20 was a French, single engine, low wing monoplane, one of a series of this type built by SFCA in the 1930s. It was capable of aerobatics but was primarily a racing aircraft.

SFCA Lignel 10

The SFCA Lignel 10 was a French single seat aircraft designed to bridge a training gap between basic trainers and front-line fighters. The military requirement was soon dropped and only one was built.

Delanne 11

The Delanne 11 was a French two seat touring aircraft. Only one was built.

The Gaucher RG.40 Week-End was a high-wing, two-seat, low-power, touring aircraft built in France in 1935. Three were built and later SECAT produced several rather similar designs, all from designer Rémy Gaucher.

Bessard-Millevoye Moineau

Bessard-Millevoye Moineau (Sparrow) was a single seat, low-powered French biplane intended to increase participation in popular aviation. Only one was built.

The Caudron C.570 was a French twin-engine aircraft designed and built by Caudron in the mid-1930s. It was designed to function in multiple roles; as a bomber, passenger transport, paratroop aircraft, cargo aircraft and air ambulance.

Volland V-10

The Volland V-10 was a French two seat, low-powered biplane notable for its extreme stagger. It first flew in 1936 and appeared at the Paris Aero Salon that year.

The Régnier 12 was a 1930s Belgian touring aircraft offering variants with different engines and seating plans. Only one was built.

Wibault 260 French reconnaissance aircraft prototype of around 1930

The Wibault 260 R.2 was a contender for a French government contract for a long range, two seat reconnaissance aircraft, issued in 1928. There were eight prototypes in the 1931-2 contest and the Wibault was not selected for production.

SABCA Demonty-Poncelet limousine

The SABCA Demonty-Poncelet monoplane, Demonty-Poncelet limousine or SABCA-DP was a Belgian light aircraft first flown in 1924. It had two comfortable side-by side seats in a glazed cabin. Though it had competition successes in 1924 and 1925, it did not go into production.

Peyret-Nessler Libellule

The Peyret-Nessler Libellule (Dragonfly) was a French two-seat, low-powered parasol wing light aircraft built in 1927 to provide practical but economical flying. It was one of the first of these French avionettes.

CAMS 54

The CAMS 54 was a strengthened and more powerful version of the French CAMS 51 civil transport and naval reconnaissance flying boat, developed for transatlantic flights. It is sometimes referred to as the 54 GR.

Lumière-de Monge racer

The Lumière-de Monge racer was built specifically to compete in the 1921 Coupe Deutsch de la Meurthe, flown at Etampes on 1 October 1921. As well as being fast, it was unusual in being a high wing monoplane which could be rapidly converted into a biplane by adding smaller lower wing. It crashed, fatally, before the race.

References

  1. 1 2 3 4 5 6 7 8 Frachet, André (4 March 1935). "Le bimoteur léger Duverne-Saran". Les Ailes (745): 3.
  2. Hirschauer, L.; Dolfus, Ch. (1933). L'Année Aeronautique 1933-34. Paris: Dunod. p. 60-61.
  3. Bruno Parmentier (17 January 2013). "Duverne-Saran" . Retrieved 28 March 2016.
  4. "Essais, raíds et records d'aviation". Le Journal: 3. 18 October 1935.
  5. "Les essais en vol". l'Aéro: 5. 8 May 1936.
  6. "Les Avions de Tourisme". Les Ailes (821): 4. 11 March 1937.
  7. "Les avions d'essais". Les Ailes (830): 11. 13 May 1937.
  8. "Les avions prives". Les Ailes (853): 15. 21 October 1937.
  9. "Les avions prives". Les Ailes (863): 15. 30 December 1937.
  10. "Les avions legers". Les Ailes (913): 10. 30 December 1937.
  11. Jack Erickson. "Outstanding Compilation of Horizontally Opposed Aero Engine Information" . Retrieved 30 March 2016.