Bell 201
 The Bell 201 (military designation XH-13F) was a modified Model 47G. The Bell 201/XH-13F was Bell's first helicopter to use a turbine engine. The Bell 201 was built to test components for the new XH-40 Bell Helicopter's prototype for its UH-1 Iroquois.The Bell 201 was powered by one Continental CAE XT51-T-3 turboshaft engine producing 425 shp (317 kW) a license-built development of the Turbomeca Artouste. The 201 first flew on October 20 1954.