Downloaded from https://www.everyspec.com ADS-39A-HDBK UH-60L/MH-60K Black Hawk Main Module Gearbox UH-60A/UH-60L/MH-60K Black Hawk Input/Accessory Module Gearboxes Notes: 1. 300 minute cycle - repeat as required. 2. All conditions to be run at 100% speed. a. Main rotor shaft speed 258 rpm. b. Tail takeoff speed 4116 rpm. c. Input shaft speed 20,900 rpm. 3. Use MIL-L-23699 lubricant. 4. Alternate runs of 5 minutes duration at 1500 SHP input power and 2.5 minutes duration at 400 SHP input power. 5. Manifold oil pressure 50-65 psig. 6. Oil-in temperature 77±3 o C. Sump temperature to be 30 o C above oil-in temperature. 7. Main shaft power is neglecting friction losses. 8.
Main shaft thrust 27,000 pounds. Test Spectrum “3” 3 CONDITION DURATION (MIN.) L/H INPUT (SHP) R/H INPUT (SHP) TOTAL INPUT (SHP) TTO OUTPUT (SHP) MAIN SHAFT OUTPUT 1 15 500 500 1000 70 930 2 40 1700 1700 3400 420 2980 3 15 1900 Min. 1900 420 1480 4 8 1760 Min. 1760 170 1590 5 15 Min. 1900 1900 420 1480 6 8 Min. 1760 1760 170 1590 7 20 1700 1700 3400 530 2870 8 20 1760 1760 3520 530 2990 9 25 1530 1530 3060 380 2680 10 20 1360 1360 2720 170 2550 11 29 1190 1190 2380 380 2000 12 35 850 850 1700 420 1280 13 20 1700 1700 3400 170 3230 14 30 1760 1760 3520 170 3350