Siemens-Halske Sh 22

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Sh 22

The Siemens-Halske Sh 22 (also known as SAM 22) was a nine-cylinder aircraft radial engine manufactured by Siemens & Halske in Germany in the 1930s. Following the reorganization of its manufacturer and change in military nomenclature, the engine became known as the Bramo 322.

It was a result of a series of modifications to the original Bristol Jupiter IV design, which Siemens licensed in 1929. The first modifications were to "Germanize" the dimensions, producing the Sh.20 and Sh.21. The design was then bored out to produce the 950 hp (708 kW) Sh.22 in 1930. Like the Jupiter, the Sh.22 featured a rather "old" looking arrangement with rather prominent valve pushrods on the front of the engine. In the mid-1930s the Reich Air Ministry (RLM) rationalized engine naming, and Bramo was given the 300-block of numbers, the Sh.14 and Sh.22 becoming the Bramo 314 and 322 respectively. The 322 never matured and remained unreliable. It became a base for the more successful Bramo 323.

Applications

• Dornier Do 19 (proposed)
• Fieseler Fi 98
• Heinkel He 46
• Henschel Hs 122
• Junkers W 34
• Junkers Ju 86ab1 prototype

Specifications (Bramo 322H-2)

Data from Aviacionnye motory voennykh vozdushnykh sil inostrannykh gosudarstv, Flugzeug-Typenbuch. Handbuch der deutschen Luftfahrt- und Zubehör-Industrie 1944

General characteristics

• Type: 9-cylinder single-row supercharged air-cooled radial engine
• Bore: Template:Cvt
• Stroke: Template:Cvt
• Displacement: 26.82 L (1,636.8 in³)
• Length: Template:Cvt
• Diameter: Template:Cvt
• Dry weight: Template:Cvt dry, unequipped

Template:Cvt wet, equipped

Components

• Valvetrain: Two overhead valves per cylinder driven by pushrods and rockers
• Supercharger: Single-speed centrifugal type supercharger running at 6.25:1
• Fuel system: Carburetor
• Fuel type: 87 octane gasoline
• Oil system: pressure fed at Template:Cvt
• Cooling system: Air-cooled
• Reduction gear: Farman epicyclic gearing, 0.62:1

Performance

• Power output:
  

• Template:Cvt at 2,150 rpm (5 minutes) at sea level
• Template:Cvt at 2,080 rpm (30 minutes) at sea level
• Template:Cvt at 2,000 rpm (max. continuous / cruise) at sea level

• Specific power: Template:Cvt
• Compression ratio: 6.4:1
• Specific fuel consumption: Template:Cvt at max continuous
• Oil consumption: Template:Cvt at max continuous
• Power-to-weight ratio: Template:Cvt at cruise
• B.M.E.P.: Template:Cvt