Downloaded from https://www.everyspec.com ADS-39A (HDBK) Test Spectrum “1” UH-60A Black Hawk Main Module Gearbox 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 24,000 pounds.
Test Spectrum “2” 2 CONDITION DURATION (MIN.) L/H INPUT (SHP) R/H INPUT (SHP) TOTAL INPUT (SHP) TTO OUTPUT (SHP) MAIN SHAFT OUTPUT 1 20 1414 1414 2828 250 2578 2 15 500 500 1000 70 930 3 25 (4) 1500 1500 3000 250 2750 4 15 1700 Min. 1700 70 1630 5 8 1500 Min. 1500 250 1250 6 50 1414 1414 2828 424 2404 7 15 Min. 1700 1700 70 1630 8 8 Min. 1500 1500 250 1250 9 25 1275 1275 1550 424 2126 10 20 1150 1150 2300 250 2050 11 22 750 750 1500 424 1076 12 22 1414 1414 2828 250 2578 13 30 1050 1050 2100 250 1850 14 25 (4) 1500 1500 3000 250 2750