SNCASO SO.30 Bretagne — Twin-Engine Transport Aircraft Documentation Collection

The SNCASO SO.30 Bretagne was a French twin-engine passenger and military transport aircraft developed during World War II and refined through the postwar reconstruction era. Produced by Société Nationale de Constructions Aéronautiques du Sud-Ouest (SNCASO), the Bretagne served as a critical stepping stone for rebuilding the French aerospace industry — bridging wartime engineering with the jet age through a series of ambitious powerplant and structural experiments.

This archival collection reproduces original factory documentation across the SO.30 family, including the Manuel d'Utilisation SO.30 P · B 43 (Bretagne No. 12, 1950), the original SNCASO commercial brochure for the SO.30 Bretagne, the SO.30P pressurised cabin variant brochure, and the SO.30R Bellatrix development brochure.

1. Airframe & Aerodynamic Configuration

• Layout: Mid-wing cantilever monoplane — all-metal construction throughout
• Tail Assembly: Dual vertical fins and rudders for enhanced directional stability
• Landing Gear: Early prototypes: tailwheel configuration; production variants: tricycle undercarriage
• Auxiliary Thrust: Select airframes fitted with underwing Turbomeca Palas turbojets to augment takeoff lift profiles

2. Powerplant Variants

• SO.30P-1: Twin Pratt & Whitney R-2800-B43 radial piston engines — 1,800 hp each
• SO.30P-2: Twin Pratt & Whitney R-2800-CA18 — upgraded to 2,400 hp each
• Propeller Assemblies: 4-bladed Curtiss Electric or 3-bladed Hamilton Standard square-tipped paddle blades
• Jet Testbeds: Airframes modified to test early Rolls-Royce Nene and SNECMA Atar 101 turbojets — significant engineering milestone in French jet development

3. Performance Data

• Maximum Speed: 575 km/h (310 kt) at optimal altitude
• Cruising Speed: 438 km/h (237 kt) economical cruise
• Service Ceiling: 8,000 m (26,000 ft)
• Ferry Range: 2,175 km (1,174 nm)

4. Handling & Engineering Notes

• Dead-Engine Trim: Control surfaces designed to maintain safe margins during single-engine operations
• Weight Profile: High empty structural weight noted in engineering assessments relative to American contemporaries (Douglas DC-3 class)
• Cargo Variant (SO.30C): Narrow rear loading ramp limited vehicle insertion capability — documented in military logistics bulletins

Document Manifest

• Manuel d’Utilisation SO.30 P · B 43 — Bretagne No. 12, 1950 · SNCASO · French language · Operator’s flight manual for the pressurised B 43 variant, Airframe No. 12
• SO.30 Bretagne Commercial Brochure — SNCASO original sales brochure · Illustrated profile artwork · Société Nationale de Constructions Aéronautiques du Sud-Ouest, Paris XVIᵉ
• SO.30P “Bretagne” Pressurised Cabin Brochure — English-language SNCASO brochure · Twin-engined commercial aircraft with pressurised cabin · Includes in-flight photograph of F-BAYK
• SO.30R Bellatrix Development Brochure — SNCASO · French language · Covers the SO.30R long-range development variant with revised powerplant and extended fuselage studies

This is an archival, static-copy edition fixed at its original publication date. Intended for historical reference, flight simulation, museum restoration, and educational use only. Not approved for active airworthiness maintenance under FAA 14 CFR § 43.13, EASA Part-M, or equivalent international regulations. Operators of active aircraft must use current, revision-controlled publications from the Type Certificate holder or an authorised distributor.

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