Lycoming T53
The Lycoming T53, (company designation LTC-1) is a turboshaft engine used on helicopters and (as a turboprop) fixed-wing aircraft since the 1950s. It was designed at the Lycoming Turbine Engine Division in Stratford, Connecticut, by a team headed by Anselm Franz, who was the chief designer of the Junkers Jumo 004 during World War II.
| T53 | |
|---|---|
![]()  | |
| Cutaway view of an early T53 turboprop, with single stage HP and power turbines | |
| Type | Turboshaft | 
| National origin | United States | 
| Manufacturer | Lycoming Engines  Honeywell Aerospace  | 
| First run | ~1955 [1] | 
| Major applications | AH-1 Cobra  Kaman K-MAX OV-1 Mohawk UH-1 Iroquois  | 
| Developed into | Lycoming T55 | 
A much larger engine, similar in overall design, became the Lycoming T55. Both engines are now produced by Honeywell Aerospace.
Variants
    
    Military designations
    

Lycoming T53-L-1 Turboshaft Engine at Steven F. Udvar-Hazy Center in Virginia, USA.
- T53-L-1
 - T53-L-1A
 - 770 hp (645 kW)
 - T53-L-1B
 - 860 hp (645 kW)
 - T53-L-3
 - T53-L-5
 - 960 hp (720 kW)
 - T53-L-7
 - T53-L-11
 - 1100 hp (820 kW)
 - T53-L-13
 - T53-L-13B
 - 1400 shp (1044 kW) improved L-11
 - T53-L-701
 - 1,400 hp (1044 kW) Turboprop variant used on Mohawk and AIDC T-CH-1
 - T53-L-703
 - 1,800 hp (1343 kW) improved durability variant of the L-13B
 
Civil designations
    
- T5307A
 - commercial L-7
 - T5309A
 - commercial L-9A
 - T5309B
 - commercial L-9B
 - T5309C
 - similar to T5309A but with L-11 combustion chamber
 - T5311A
 - 1100 shp (820 kW)
 - T5313A
 - 1400 shp (1044 kW) commercial variant of the L-13
 - T5313B
 - 1400 shp (1044 kW) commercial variant of the L-13
 - T5317A
 - 1500 shp (1119 kW) improved variant of the L-13
 - LTC1B-1
 - LTC1B-2
 - company designation for L-1A
 - LTC1F-1
 - company designation for L-3
 - LTC1F-2
 - company designation for L-7
 - LTC1K-1
 - company designation for L-5
 - LTC1K-2
 - company designation for L-9
 - LTC1K-2A
 - company designation for L-9A
 - LTC1K-2B
 - company designation for L-9B
 - LTC1K-4
 - company designation for L-13
 - LTC1K-4A
 - for tilt-wing / tilt-rotor aircraft (Canadair CL-84 Dynavert)
 - LTC1K-4K
 - 1550 shp (1156 kW) direct drive variant of the L-13B
 - LTC1K-5
 - company designation for L-11
 - Kawasaki KT5311A
 - Kawasaki production for Fuji-Bell 204B helicopters
 
Applications
    
- AIDC T-CH-1 (T53-L-701)
 - AIDC XC-2
 - Bell 204B (T5311A)
 - Bell 205A (T5313B)
 - Bell 205A-1 (T5313B and T5317A)
 - Bell AH-1 Cobra (T53-L-703)
 - Bell UH-1H Iroquois (T53-L-703)
 - Bell XV-15 (LTC1K-4K)
 - Boeing Vertol VZ-2 (YT53)
 - Canadair CL-84 Dynavert
 - Doak VZ-4
 - F+W C-3605
 - Grumman OV-1D Mohawk (T53-L-701)
 - Kaman HH-43 Huskie
 - Kaman K-1200 (T5317A)
 - Kaman K-MAX
 - Ryan VZ-3 Vertiplane
 - DB Class 210, diesel railway locomotive
 
Specifications (T53-L-701)
    
Data from Flight International[2]
General characteristics
- Type: Turboshaft
 - Length: 58.4 in (1,483 mm)
 - Diameter: 23 in (584 mm)
 - Dry weight: 688 lb (312 kg)
 
Components
- Compressor: 5-stage axial and 1-stage centrifugal
 - Combustors: reverse flow
 - Turbine: 2-stage high pressure turbine; 2-stage power turbine
 
Performance
- Maximum power output: 1,451 shp (1,082 kW)
 - Overall pressure ratio: 7.4
 - Air mass flow: 10.7 lb/s (4.853 kg/s)
 - Power-to-weight ratio: 2.109 hp/lb
 
References
    
- "sir roy | roy dobson | managing director | 1955 | 1400 | Flight Archive". Archived from the original on 2017-05-17.
 - Turbine Engines of the World, 1975
 
- 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
    
| Wikimedia Commons has media related to Lycoming T53. | 
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