power the U.S. Navy's Ship-to-Shore Connector air-cushioned landing craft. The T408 was also tested by the U.S. Army and Boeing as an alternative powerplant on an NCH-47D Chinook testbed helicopter. The helicopter configuration was ground tested beginning in late 2019, followed by an initial flight on September 22, 2020. Conclusion of the test trials was announced on May 12, 2021. Variants T407-GE-400 Lockheed P-7 T408-GE-400 (GE38-1B) Boeing NCH-47D Chinook (flying testbed) Sikorsky CH-53K King Stallion CFE CFE738 Turbofan variant of the T407-GE-400, used on the Dassault Falcon CPX38 Proposed turboprop engine variant of the GE38-1B GE38-3 An class derivative engine under consideration by the U.S. military in 2006 GE38-B5 A contra-rotating, ungeared, unducted fan (UDF) derivative with a bare engine weight (including the UDF) of , a UDF diameter of , and a blade count of 11 on one propeller and 9 on the other; provides a takeoff thrust of with a thrust-specific fuel consumption (TSFC) of , and a cruise thrust of with a TSFC of ; proposed for the MPC 75 German-Chinese regional airliner in the late 1980s GLC38 Proposed turboprop variant of the T407-GE-400 Applications Boeing NCH-47D Chinook (flying testbed) Sikorsky CH-53K King Stallion Specifications (T408) See also References Bibliography External links General Electric GE38 page GE38 page on deagel.com GE38 1980s turboshaft engines