Siemens-Halske Sh 12
The Siemens-Halske Sh 12 was a nine-cylinder, air-cooled, radial engine for aircraft built in Germany in the 1920s. First run in 1925, it was rated at 80 kW. The Sh 12 was also produced in the United States by Ryan Aeronautical Corp. as the Ryan-Siemens 9.Applications
