The SNCASO S.O.7050, S.O.7055, S.O.7056 and S.O.7060 Deauville were single-engine light

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civil utility aircraft of the 1940s. Only two airframes were built but were modified with different undercarriages, engines and seating.

Development

In 1947

SNCASO SNCASO (abbreviated from ''Société nationale des constructions aéronautiques du Sud-Ouest'' ), or commonly ''Sud-Ouest'', was a French aircraft manufacturer. Created during 1936 as one of seven nationalised aeronautical manufacturing companie ...

built two similar light aircraft both carrying the name Deauville. The first, the S.O.7050 which flew on 11 June had a

tricycle undercarriage Tricycle gear is a type of aircraft undercarriage, or ''landing gear'', that is arranged in a tricycle fashion. The tricycle arrangement has one or more nose wheels in a single front undercarriage and two or more main wheels slightly aft of th ...

.Gaillard (1990) p.66 The second, the S.O.7055 flew on 1 July with a

tailwheel undercarriage Conventional landing gear, or tailwheel-type landing gear, is an aircraft Landing gear, undercarriage consisting of two main wheels forward of the Center of gravity of an aircraft, center of gravity and a small wheel or skid to support the tail ...

. The first and possibly the second machine was powered by a Mathis 4GO

flat-four engine A flat-four engine, also known as a horizontally opposed-four engine or boxer engine, is a four-cylinder piston engine with two banks of cylinders lying on opposite sides of a common crankshaft. The most common type of flat-four engine is the box ...

, though the S.O.7055 had a Minié 4.DC.32 flat-four at some point. It was later modified into the SO.7056. In 1948 both airframes were re-engined with

Walter Minor 4-III The Walter Minor is a family of four- and six-cylinder inverted inline air-cooled engines, developed under auspices of ing. Šimůnek and used on light aircraft. First produced in 1929, the Minor engines' family has an advanced design for the p ...

engines and a third seat was added behind the two front side-by-side seats to produce the S.O.7060 Deauville. The undercarriage of the S.O.7050 was modified to be like that of the SO.7056, so both S.O.7060s had tailwheel gear. The Deauvilles were of all-metal construction with low/mid set wings of constant chord, straight tapered tail surfaces and a fixed tailwheel undercarriage. The canopy was entirely transparent and slid back to permit the access of pilot and passengers. Dual controls were provided.

Operational history

The first airframe ''F-BDVZ'' was flown by its makers in S.O.7060 form for several years and then by an aero club based at St-Cyr-l'Ecole airfield to the west of

Paris Paris () is the Capital city, capital and List of communes in France with over 20,000 inhabitants, largest city of France. With an estimated population of 2,048,472 residents in January 2025 in an area of more than , Paris is the List of ci ...

during the later 1950s and through the 1960s. The aircraft remained on the French civil aircraft register in May 1967,WLAG, 1967, p. 4 but was no longer registered in 1973 and it has not survived in preservation.

Variants

;S.O.7050 Deauville: The first aircraft in its original form, with the Mathis engine and tricycle gear, first flown 11 June 1947. ;S.O.7055 Deauville: The second, with conventional gear and at least part of the time with the Minié 4Dc-32 engine instead of the Mathis. First flown on 1 July 1947. ;S.O.7056 Deauville: The S.O.7055 modified. ;S.O.7060 Deauville: The S.O.7050 and the S.O.7056 re-engined with Walter Minor 4-III engines, both with tailwheel undercarriages, and with a third seat behind the side by side front seats. First flown on 22 March 1948.

Specifications (S.O.7060)

References

;Notes ;Bibliography * * * {{SNCASO aircraft 1940s French civil utility aircraft

Deauville Deauville () is a communes of France, commune in the Calvados (department), Calvados department, Normandy (administrative region), Normandy, northwestern France. Major attractions include its port, harbour, Race track, race course, marinas, con ...

Low-wing aircraft Single-engined tractor aircraft Aircraft first flown in 1948