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The General Electric T58 is an American turboshaft engine developed for helicopter use. First run in 1955, it remained in production until 1984, by which time some 6,300 units had been built. On July 1, 1959, it became the first turbine engine to gain FAA certification for civil helicopter use. The engine was license-built and further developed by de Havilland in the UK as the Gnome, in the West Germany by Klöckner-Humboldt-Deutz,[1] and also manufactured by Alfa Romeo and the IHI Corporation.

T58
Type	Turboshaft
National origin	United States
Manufacturer	GE Aviation
First run	April 1955
Major applications	Boeing Vertol CH-46 Sea Knight Kaman SH-2 Seasprite Sikorsky SH-3 Sea King
Variants	Rolls-Royce Gnome,

Design and development

Development commenced with a 1953 US Navy requirement for a helicopter turboshaft to weigh under 400 lb (180 kg) while delivering 800 hp (600 kW). The engine General Electric eventually built weighed only 250 lb (110 kg) and delivered 1,050 hp (780 kW) and was soon ordered into production. First flight was on a modified Sikorsky HSS-1 in 1957, and civil certification for the CT58-100 variant was obtained two years later.[2]

A number of unusual features are incorporated into the T58:[3]

1. an all-axial compressor. Most other turboshafts in this power bracket have a centrifugal unit as a final compressor stage. As a result, the blades at the rear of the compressor are very small (less than 0.5in high) and extremely thin.
2. compressor handling at part speed is facilitated by several rows of variable stators at the front part of the unit. This was a fairly novel feature when the engine was first introduced.
3. a single stage power turbine. which delivers power to the rear of engine. The hot exhaust stream is diverted sideways, away from the output shaft.
4. the combustor is a straight-through annular design, rather than reverse flow.

The main production version of the engine was the T58-GE-10, developing 1,400 hp (1,044 kW). The most powerful version, the T58-GE-16, produces 1,870 hp (1,390 kW).[4]

Variants

[5]

T58-GE-1

1,290 hp (960 kW)

T58-GE-2

1,325 hp (988 kW)

T58-GE-3

1,290 hp (960 kW)

T58-GE-4

T58-GE-5

1,500 hp (1,100 kW)

T58-GE-6

1,250 hp (930 kW)

T58-GE-8B

1,250 hp (930 kW)

T58-GE-8E

1,350 hp (1,010 kW)

T58-GE-8F

1,350 hp (1,010 kW)

T58-GE-10

1,400 hp (1,000 kW)

T58-GE-14

1,400 hp (1,000 kW) 2-stage power turbine

T58-GE-16

1,870 hp (1,390 kW)

T58-GE-100

1,500 hp (1,100 kW)

T58-GE-402

1,500 hp (1,100 kW)

CT58-100-1

1,050 hp (780 kW)

CT58-110-1

1,350 hp (1,010 kW)

CT58-140-1

1,500 hp (1,100 kW) commercial T58-GE-10

Ishikawajima-Harima CT58-IHI-110-1

1,400 hp (1,000 kW)

Ishikawajima-Harima CT58-IHI-140-1

1,400 hp (1,000 kW)

Ishikawajima-Harima T58-IHI-8B BLC

For Shin Meiwa PS-1 BLC system

Rolls-Royce Gnome

Licensed production and development of the T58 in the United Kingdom.

Applications

Other

Two T58s, converted to turbojets by the removal of the power turbines, were used as the engines on the Maverick TwinJet 1200.[6]

The Carroll Shelby turbine cars entered in the 1968 Indianapolis 500 race were powered by T58s.[7] The cars were found to be using variable inlets to get around the USAC regulations on the maximum allowable inlet size and were disqualified.

Turboshaft engines like the GE T58, Lycoming T53/T55 are also used to power high performance powerboats, such as aport and offshore vee, and catamaran hulls like the Skater "Jet Set" or Mystic Powerboats "My Way", water jet river racers like Unnatural Disaster and hydroplanes. Some of these boats run in excess of 200 mph, despite them being open cockpit pleasure boats.

Engines on display

• There is a YT58-GE-2A cutaway on display at the New England Air Museum, Bradley International Airport, Windsor Locks, CT [8]

Specifications (T58-GE-8)

Data from [9][10]

General characteristics

• Type: Free power turboshaft
• Length: 55 in (1,397 mm)
• Diameter: 16 in (406 mm)
• Dry weight:
  • 285 lb (129 kg) without reduction gearbox,
  • 391 lb (177 kg) with reduction gearbox

Components

• Compressor: 10-stage axial-flow compressor with variable inlet guide vanes, and variable incidence stators in first three stages
• Combustors: Annular combustion chamber with 16 burner nozzles on two manifolds
• Turbine:
  • 2× gas generator turbine stages and
  • 1× free power turbine stage
• Fuel type: Aviation kerosene

Performance

• Maximum power output: 1,250 hp (932.12 kW)
• Overall pressure ratio: 8.3:1
• Air mass flow: 12.4 lb/s (5.62 kg/s) at 26,300 rpm
• Specific fuel consumption: 0.64 lb/(hp⋅h) (0.39 kg/(kW⋅h)) at maximum continuous rating
• Power-to-weight ratio: 6.1 hp/lb (10.0 kW/kg) without reduction gearbox

See also

Related development

• Rolls-Royce Gnome

Related lists

• List of aircraft engines

References

Wikimedia Commons has media related to General Electric T58.

• Gunston, Bill (1986). World Encyclopedia of Aero Engines. Wellingborough: Patrick Stephens. p. 65.
• GE Aviation T58 page and T58 history page
• General Electric (September 4, 2018). 1E3. Federal Aviation Administration (FAA) (Report). Type Certificate Data Sheet (16th ed.).
• Ishikawajima-Harima (August 10, 1970). E1PC. Federal Aviation Administration (FAA) (Report). Type Certificate Data Sheet (1st ed.).

External links

• Minijets website

На других языках

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[de] General Electric T58

Das General Electric T58 ist eine kleine Wellenturbine des US-amerikanischen Herstellers General Electric Company, die seit den 1950er Jahren in Hubschraubern und Starrflügelflugzeugen eingesetzt wird. Die Serienproduktion endete 1984 nach über 7000 gefertigten Exemplaren. Die zivile Version CT58 erhielt am 1. Juli 1959 die Musterzulassung durch die Federal Aviation Administration.

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- [en] General Electric T58

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[es] General Electric T58

El General Electric T58 es un motor aeronáutico de tipo turboeje desarrollado para ser usado en helicópteros. Fue encendido por primera vez en 1955, permaneció en producción hasta 1984, momento en el cual unas 6.300 unidades habían sido fabricadas. El 1 de julio de 1959, se convirtió en el primer motor de turbina en conseguir la certificación FAA para uso civil. Este motor fue fabricado bajo licencia y desarrollado en el Reino Unido por de Havilland bajo el nombre Gnome, y también fue fabricado por Alfa Romeo en Italia y IHI Corporation en Japón.

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[fr] General Electric T58

Le General Electric T58 est un turbomoteur américain conçu pour équiper les hélicoptères. Démarré pour la première fois en 1955, il est resté en production jusqu'en 1984, date à laquelle quelque 6 300 exemplaires avaient été produits. Le 1er juillet 1959, il devient le premier turbomoteur à obtenir la certification de la FAA pour pouvoir être utilisé dans des hélicoptères civils. Il a aussi été construit sous licence et développé par la société britannique De Havilland sous la désignation de Gnome, et aussi fabriqué par Alfa Romeo et la IHI Corporation.

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[it] General Electric T58

Il General Electric T58 era un motore aeronautico turboalbero prodotto dall'azienda statunitense General Electric Aircraft Engines dalla seconda parte degli anni cinquanta e sviluppato specificatamente per motorizzare elicotteri.

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