Siemens-Halske Sh 22 / SAM 322 / Bramo 322 / BMW-Bramo 322 — Engine Manuals Collection
A curated archival collection of primary-source technical documents covering the Siemens-Halske Sh 22 and its successive designations — the nine-cylinder air-cooled radial engine derived from the British Bristol Jupiter IV, which powered the Heinkel He 50, the Junkers W 34 (hi variant), and early prototypes of the Dornier Do 19 heavy bomber, serving as a vital engineering stepping stone in the development of German pre-war radial engine technology.
Note on the Collection: This is the same engine under different company names over time. In 1926 the engine division became Siemens Flugmotorenwerk, marketed under the Siemens-Halske name. In the early 1930s the company became Siemens Apparate und Maschinen (SAM), and the engine designation changed to SAM 322. In 1936 it was sold and renamed Brandenburgische Motorenwerke (Bramo). In 1939 it was acquired by BMW. In the following index, it is specified when the manuals were originally published under a different designation — SAM 22, Bramo 322, or Bramo/BMW 322.
Collection Overview
Total Unique Manuals: 4
Variants covered: B · H · J
Variant B · H · J — 3 Manuals
SAM 322 B·H·J Engine Subsystems
- SUM BDF V70 Carburetor Manual, SUM-Vergaser BDF V70 (German Language)
SAM 322 B·H·J Operating and Maintenance
- SAM 22 B3 and SAM 322 H1, J1 Aircraft Engines — Operating Manual, 1936 (German Language)
- SAM 322 H2, J2 Aircraft Engines — Operation and Maintenance Manual, 2nd Edition, 1937 (German Language)
No Variant — 1 Manual
SAM 322 Technical Publications
- SAM 322 Engine — The German Aircraft Engines, Aviation Textbook Volume 19, Luftwissen (German Language)
About the Siemens-Halske Sh 22 / SAM 322 / Bramo 322
Historical Background
First introduced in 1930 by Siemens & Halske, the Sh 22 was derived from the British Bristol Jupiter IV nine-cylinder radial, which Siemens licensed to build in 1929. It evolved directly via the localized German-dimensioned Sh 20 and Sh 21 prototype designs. Primary military applications included the Heinkel He 50, the Junkers W 34 (hi variant), and early prototypes of the Dornier Do 19 heavy bomber. Production ran from 1930 to the mid-1930s, when the engine was phased out in favour of its successor. Despite persistent reliability problems that limited its operational impact, the Sh 22 / SAM 322 served as a critical engineering stepping stone toward more mature German radial designs. The engine was completely obsolete and out of production long before the end of WWII.
Technical Specifications
- Type: Air-cooled single-row radial piston engine
- Configuration: 9-cylinder
- Displacement: 26.82 L (1,636.8 cu in)
- Bore × Stroke: 154 mm × 160 mm (6.06 in × 6.30 in)
- Power Output: 520–650 hp (up to 950 hp in early developmental testing)
- Compression Ratio: 6.4:1
- Dry Weight: ~460 kg (1,014 lbs)
- Fuel: 87-octane aviation petrol
- Notable Features: Front-facing pushrods retaining Bristol Jupiter valve architecture; Farman-type reduction gear on H variants; crankshaft-driven centrifugal supercharger
Current Status
The Sh 22 / SAM 322 / Bramo 322 is no longer flying. No active Type Certificate holder exists — the underlying manufacturing assets evolved into Bramo, were acquired by BMW in 1939, and the original type certificate has long since lapsed. No active Service Bulletins or Airworthiness Directives apply. The engine survives today solely as static museum displays and archival cutaways.
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 authorized distributor.
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