TM 5-6115-590-12 (2) Gas turbine engine Manufacturer ........................................ AiResearch Manu- facturing Com- pany of Arizona Part number.......................................... 380278-1 Model number....................................... GTCP85-127 Type...................................................... Combination pneu- matic and shaft power Turbine wheel type................................ Single stage, radial inward flow Compressor type .................................. Two stage centri- fugal Combustion chamber............................ Single reverse flow tube Acceleration time to governed speed................................ 60 seconds (max) Inlet air temperature.............................. 130°F(54°C) (max) (a)  Fuel requirements Recommended Fuels Jet fuel, grade JP-4...................... MIL-T-5624 (-65° to 140°F) (-54 ° to 60 ° C) Jet fuel, grade JP-5...................... MIL-T-5624 (-30° to 140°F) (-34° to 60°C) Turbine fuel, grade JP-8............... MIL-T-83133 (-40° to 140°F) (-40° to 60°C) Compression ignition fuel............. MIL-F-46005 (-30° to 140°F) (-34° to 60°C) Oil, diesel, grade DF2................... W-F-800 (30° to 140°F) (-1° to 60°C) Oil, diesel, grade DFA .................. W-F-800 (-65° to 140°F) (-54° to 60°C) Kerosene...................................... EMS 309 (-30° to 140°F.) (-34° to 60°C) Fuel oil, diesel marine................... MIL-F-16884 (30° to 140°F) (-1° to 60°C) Emergency Fuels (50 hours continuous operation maximum). NOTE Power unit performance will be satisfactory but use of the  following  fuels  will  result  in  increased  gas  turbine engine maintenance. Gasoline, automotive combat ................... MIL-G-3056 (-65° to 140°F) (-54° to 60°) Gasoline, aviation grades 80/87, 100/130, 115/145..................... MIL-G-5572 (-65° to 140°F) (-54° to 60°C) (b)  Lubrication requirements Lubricating oil MIL-L-7808(Below -25°F Ambient) MIL-L-23699 (Above -25°F Ambient) Lubricating system capacity (oil system)................. 10 U. S. quarts (9.46 liters) (oil change)8 U.S. quarts (7.568 liters) Oil change period ......................... 500 hours Oil temperature, starting ..................................... -65° to 140°F (-54° to 60°C) Oil temperature, operating...................................255°F (124°C) (max.) Oil pump discharge pressure....................................90 ±10 psig Oil consumption ............................0.25 pounds per hour (max) (113.37 gm) (c)  Exhaust gas temperatures Continuous operation, rated full load ............................1225°F (663°C) (max.) Transient conditions......................1300°F (704°C) (max) Acceleration controls.....................1240° to 1260°F (671° to 682°C) Load control thermostat.................1025° to 1075°F (552° to 579°C) (d)  Operating speeds Turbine wheel governed speed, rated full load (100 percent) ............................40,700 ±100 rpm Turbine wheel governed speed, no load...........................41,600 (max) Overspeed shutdown switch actuation........................44,250 ±250 rpm Engine output shaft speed...............................6000 rpm Speed ratio, turbine wheel to tachometer generator drive..........................9,806 to 1.0 (3) 24V DC electrical system Batteries (2 required connected in series)..........................12V, 45 ampere hour lead-acid per MIL-B26220 and MS35000, 2HN Battery charger: Manufacturer.....................................Amertech Corp., Phoenix, Arizona Part number ......................................13217E3993 Model number ...................................BC-100 Input..................................................208V, 400 Hz, 3 phase Output ...............................................28V DC, 30 amps Type ..................................................Transformer- rectifier Engine starter motor: Manufacturer.....................................AiResearch Manu- facturing Com- pany of Arizona Part number ......................................372697-9 Current..............................................600 amp (momentary) Duty cycle..........................................One minute on, four minutes off, or five starts in ten minutes. Fuel boost pump: Manufacturer.....................................AiResearch Manu- facturing Com- pany of Arizona Part number ......................................371240-2 Discharge pressure...........................15.0 psig (max) Current requirements........................2.0 amps Engine electrical system power requirements (until light-off) ................................7.5 amps Change 6 1-30