This collection brings together the essential technical documentation for the legendary Salmson 9-cylinder radial engine family — from the pioneering water-cooled WWI variants to the celebrated air-cooled 9AD that powered the light aircraft movement of the 1920s and 1930s. Produced by the Société des Moteurs Salmson of Billancourt, France, these engines represent a pivotal chapter in aviation engineering history, and this structured collection makes their documentation accessible to historians, restorers, and vintage aviation enthusiasts worldwide.

Definitive Collection with Free Lifetime Updates: This is a living collection that we continuously expand and refine. As we acquire additional Salmson documentation, technical bulletins, or variant-specific materials, we update this collection and provide free lifetime updates to all purchasers. Your one-time purchase guarantees access to all future additions and improvements to this collection.

Historical Note

The Salmson engine lineage traces its origins to the Canton-Unné patents of 1909, which introduced a uniquely elegant water-cooled radial layout combined with an epicyclic gear system — a design that eliminated the traditional master/slave rod arrangement and delivered exceptionally smooth power delivery. The company, formally known as the Société des Moteurs Salmson and headquartered in Billancourt, France, began producing aero engines in 1911.

During the First World War, the 9Z and 9B variants — producing between 230 and 260 hp — became among the most successful stationary radial engines of the conflict, powering reconnaissance aircraft such as the Salmson 2 A.2 and various Caudron and Farman types. Approximately 3,000 units of the 9Z alone were produced in France, with licensed production also undertaken by British Salmson and Dudbridge Iron Works in the United Kingdom.

After the war, Salmson pivoted decisively toward the emerging light aircraft market. The 9AD — a compact, air-cooled 9-cylinder radial producing 40–55 hp — became a defining engine of the interwar light plane movement. It powered aircraft including the Klemm L.25, Caudron C.109, Jodel D.11, and the American Eaglet, and was associated with numerous record-breaking distance and altitude flights throughout the late 1920s. Production continued until the company's liquidation in 1951, with total output across all variants reaching several thousand units.

Today, rare examples of the Salmson 9AD survive in airworthy condition in restored Klemm L.25s and some vintage French homebuilts, while the majority of surviving engines are preserved as static displays in institutions such as the National Air and Space Museum.

Manuals Included in This Collection

• Salmson AD 9 40 PS — Aircraft Aero Operation and Maintenance Manual — Betrieb und Unterhaltung (German Language)
• Salmson M 9 — Aircraft Aero Engine Technical Manual (Italian Language)
• Salmson M 7 / M 9 — Aircraft Aero Engine Technical Manual (French Language)
• Salmson A9 / R9 — Aircraft Aero Engine Technical Manual (French Language)
• Salmson 9 Zm — Aircraft Aero Engine Description Manual (French Language)
• Salmson 9 Zm — Aircraft Aero Engine Technical Manual (French Language)
• Salmson 9 AD — Aircraft Aero Engine Technical Manual (French Language)
• Salmson 9 AB — Aircraft Engine Technical Manual (French Language)

This collection spans the full Salmson 9-cylinder family, covering water-cooled WWI variants (9Z, 9B, M7, M9) through to the iconic air-cooled interwar types (9AD, 9AB, 9Zm, A9, R9). Documentation is presented in the original languages of publication — French, German, and Italian — reflecting the broad international reach of Salmson engines across European aviation.

Engineering Norms and Standards

Salmson engines were designed and manufactured to French military aviation standards of the WWI and interwar periods, including specifications issued by the Service Technique de l'Aéronautique (STAé). The Canton-Unné epicyclic gear system was a proprietary engineering solution that distinguished Salmson designs from contemporary rotary and inline engines, and the manuals in this collection document the specific tolerances, assembly procedures, and maintenance practices associated with this unique architecture. Licensed variants produced in the UK by British Salmson and Dudbridge Iron Works adhered to equivalent British Air Ministry standards of the period.

Technical Specifications — Salmson 9AD (Representative Example)

• Engine type: Air-cooled radial (early models water-cooled)
• Configuration: 9 cylinders, single-row radial
• Displacement: 182 cu in (3.0 L) — 9AD; 1,112 cu in (18.2 L) — 9Z
• Horsepower range: 40 hp (9AD) to 260 hp (9Z)
• Bore and stroke: 2.75 × 3.375 in (9AD)
• Compression ratio: Approximately 5.6:1 to 6:1 depending on variant
• Weight: 154 lbs (9AD) to 473 lbs (9Z)
• Fuel type: Aviation gasoline (standard low-octane for the era)
• Notable engineering feature: Canton-Unné epicyclic gear system for exceptionally smooth power delivery

Where to Find Additional Documentation

Historical Archives: The Musée de l'Air et de l'Espace (Le Bourget, France) holds archival materials related to Salmson aircraft and engines. The Vintage Aero Flying Museum and the National Air and Space Museum (Washington D.C.) preserve static examples. Type-specific communities such as the Klemm Flugzeugbau enthusiast networks and French homebuilt aviation forums (notably those associated with Jodel and Caudron types) are valuable sources for operational knowledge and surviving documentation.

Specialty Vendors: Online Aviation Library continues to expand its coverage of early French aero engines. Additional documentation for related manufacturers — including Gnome-Rhône, Lorraine, and Hispano-Suiza — is available in our catalog.

Format and Delivery

All manuals are delivered as high-resolution PDF files, optimized for both screen reading and print. Files are organized by variant and document type for straightforward navigation. Instant download upon purchase — no shipping required.

Disclaimer

These documents are provided for historical reference and research purposes only. The Société des Moteurs Salmson was liquidated in 1951; no current Type Certificate holder exists for these engines. For any airworthy Salmson engine, consult qualified vintage aviation authorities and applicable experimental or vintage aircraft regulations in your jurisdiction. Trade names and designations are used for identification purposes only. Copyright © Sicuro Publishing.