The Pratt & Whitney T73 (company designation JFTD12) is a turboshaft engine developed from the Pratt & Whitney JT12. Based on the JT12A, the T73 powered the CH-54 Tarhe/Sikorsky S-64 flying crane heavy-lift helicopter. Turboshaft versions for naval use are known as the FT12.
352 were built.
Applications:
Sikorsky CH-54 Tarhe (T73)
Sikorsky S-64 Skycrane (JTFD12)
All Aero 