Lycoming T55
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Lycoming T55

The Lycoming T55 (Company designation Lycoming LTC-4) is a turboshaft engine used on American helicopters and fixed-wing aircraft (in turboprop form) since the 1950s. It was designed at the Lycoming Turbine Engine Division in Stratford, Connecticut as a scaled-up version of the smaller Lycoming T53. Both engines are now produced by Honeywell Aerospace. The T55 also serves as the core of the Lycoming ALF 502 turbofan. Since the T55 was first developed, progressive increases in airflow, overall pressure ratio, and turbine inlet temperature have more than tripled the power output of the engine.[1][2][3]

Variants

LTC4A-1
1,651 shp (1,232kW)
LTC4B-1
LTC4B-7
company designation for L-5
LTC4B-8
company designation for L-7
LTC4B-8D
2,970 shp (2,216 kW)
LTC4B-11
similar to L-7 with two-stage gas generator turbine
LTC4B-12
4,600 shp (3,432 kW)
LTC4G-3
company designation for L-9
LTC4G-4
LTC4K
9-stage compressor
LTC4K-2
LTC4M-1
T5508D
2,930 shp (2,186 kW):Commercial version of the LTC4-8D
AL5512
4,200 shp (3,133 kW)
T55-L-1
T55-L-5
2,200 shp (1,641 kW)
T55-L-7
2,650 shp (1,977 kW)
T55-L-9
2,595 eshp (1,936 kW)
T55-L-11
3,750 shp ( 2,798 kW)
T55-L-712
3,750 shp ( 2,798 kW)
T55-L-714
4,110 shp (3,066 kW)
T55-L-714A
4,867 shp (3,631 kW)
T55-GA-715
6,500 shp (4,849 kW):variable vane control : under development.
PLF1A-2
Turbofan with T55 7-stage compressor gas generator core
PLF1B-2
Turbofan with T55 / LTC4K 9-stage compressor gas generator core
Textron Lycoming AL5512
civil T55

Applications

Specifications (T55-L-714A)

General characteristics

  • Type: Turboshaft
  • Length: 1,196.3 mm (47.10 in)
  • Diameter: 615.9 mm (24.25 in)
  • Dry weight: 377 kg (831 lb)

Components

Performance

See also

Comparable engines

Related lists

References

  1. ^ "sherpa | college | aeronautics | 1957 | 0430 | Flight Archive". Flightglobal.com. Retrieved .
  2. ^ "helicopter engine | american airlines | dry weight | 1959 | 0813 | Flight Archive". Flightglobal.com. Retrieved .
  3. ^ "1996 | 2830 | Flight Archive". Flightglobal.com. 1996-10-29. Retrieved .
  4. ^ "CH-47D Power Plants (714) (AQC/IPC/MOI/FEIC)" (PDF).
  • Gunston, Bill (2006). World Encyclopedia of Aero Engines, 5th Edition. Phoenix Mill, Gloucestershire, England, UK: Sutton Publishing Limited. p. 132. ISBN 0-7509-4479-X.

External links


  This article uses material from the Wikipedia page available here. It is released under the Creative Commons Attribution-Share-Alike License 3.0.

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