Public released T74 550hp engine maintenance manuals and IPC

m13katyusa2020

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Mar 26, 2022
T74 is a 550-hp turboshaft engine, a military virent of early PT6A-21.
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DIMENSIONS
Weight .............................................................................................................................................. 275 Pounds*
Length ................................................................................................................................................... 62 inches
Diameter................................................................................................................................................. 19 inches *
Engines with Serial No. ending with A, 294 pounds approx.
MECHANICAL DEFINITIONS
Compression ratio ............................................................................................................................................ 6.3
Reduction ratio ........................................................................................................................................... 0.0668
Propeller ......................................................................................................................................................... CW
LUBRICATION Oil................................................................................................................................MIL-L-23699 or MIL-L-7808
Oil tank capacity .................................................................................................... 2.3 gallons, 1.5 gallons usable
Consumption ............................................................................................................................................ 0.2 lb/hr
Oil pressure ............................................................................................................................................40-84 psi
Operating temperature ..........................................................................................................................190-210°F
FUEL JP4 or JP5 .......................................................................................................................................... MIL-T-5624
Specific fuel consumption .............................................................................................. 0.649 lb/shp/hr (nominal)
PERFORMANCE
Shaft horsepower, shp .................................................................................................................................... 550
Compressor turbine speed, Ng...................................................................................................... 38100 (101.5%)
Power turbine speed, Nf .................................................................................................................. 33000 (100%)
Propeller shaft speed, Np ....................................................................................................................... 2200 rpm
DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited.

Maintenance manual:
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Illustrated Parts Catalogue:
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Folder is here:
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another alternate link with access code 1234 is here

 
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