General Electric GE38

The General Electric GE38 is a gas turbine developed by GE Aviation for turboprop and turboshaft applications, and as the T408 it powers the Sikorsky CH-53K King Stallion. It grew out of the GE27, built in the early 1980s under the Army Modern Technology Demonstrator Engines program with a record single-spool pressure ratio of 22 to 1, which lost the V-22 Osprey engine competition. In the late 1980s GE used the GE27 as the basis for turboshaft, turboprop, turbofan and propfan versions under the GE38 name. The T407 military turboprop, made with Lycoming for the Lockheed P-7A, first ran on 26 December 1989 before the P-7 contract was cancelled, and the T408 has a power rating of 7,500 shaft horsepower. The T408 was also flown on a Boeing NCH-47D Chinook testbed.