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General Electric T58
de Havilland Gnome

The Engine  Specifications 
In 1953 the U.S. Navy asked for a helicopter turboshaft to weigh 400 lbs and deliver 800 hp.  GE's prototype T58 first ran in 1955 weighing 250 lbs and delivered 1,050 hp.  Two T58s powered the first jet helicopter in the U.S., a modified HSS-1, in 1957. In 1959, the civil CT58 was the first jet helicopter engine certified by the FAA.

Production ended in 1984 but not before the T58 became the basis for the LM100 gas generator and was license built by de Havilland (now Rolls-Royce) as the Gnome, Alfa Romeo and IHI.

Compressor: 10-stage axial
Four variable stators
Turbine: 2-stage LP/2-stage HP
Mass flow: 12 - 14 lbs/sec
Pressure ratio: 8
 Models  Used by
CT58-GE-8: 1,250 hp (932 kW)
T58-GE-10: 1,400 hp (1044 kW)
Gnome Mk 110: 1,350 hp (1007 kW) 
Boeing Vertol CH-46 Sea Knight
Sikorsky SH-3 Sea King
Sikorsky HH-52 Seaguard
Westland Wessex
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General Electric: T58

page updated 04 January 2008



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Kenneth W Shanaberger 2000 - 2010