Comparison Of Predicted And Measured Temperatures Of Uh 60a Helicopter Transmission PDF Download
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Author | : Harold H. Coe |
Publisher | : |
Total Pages | : 20 |
Release | : 1989 |
Genre | : Black Hawk (Military transport helicopter) |
ISBN | : |
Download Comparison of Predicted and Measured Temperatures of UH-60A Helicopter Transmission Book in PDF, ePub and Kindle
Author | : National Aeronautics and Space Administration (NASA) |
Publisher | : Createspace Independent Publishing Platform |
Total Pages | : 30 |
Release | : 2018-08-16 |
Genre | : |
ISBN | : 9781725577411 |
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The 2109-kW (2828-hp) UH-60A Black Hawk helicopter transmission was one of the transmissions used to obtain an experimental data base. Component improvements or new transmission concepts can thus be evaluated by comparison with the established data. Results of efficiency and vibration tests of the UH-60A have been reported previously. In this investigation the transmission was instrumented internally and tested over a range of operating conditions. The speed was varied from 50 to 100 percent of the full rated value, and the torque was varied from 10 to 100 percent of the full rated value. Temperatures of internal bearings and gears were measured. The computer program Planetsys was used to simulate the thermal performance of this transmission. The calculated temperatures were then compared with the corresponding measured values. The highest measured temperature was 405 K (270 F) on the outer race of the high-speed input shaft roller bearing, at the 100-percent power condition. In general, the predicted temperatures compared very well with the measured values, most of them being within 5 kelvin (9 F). Specifically, the temperatures predicted for the single-row spherical roller planetary bearing averaged only about 4 kelvin (8 F) lower than the highest measured value. Coe, Harold H. Glenn Research Center NASA-TP-2911, NAS 1.60:2911, E-4588, AVSCOM-TR-89-C-010, AD-A219173 RTOP 505-63-51...
Author | : Harold H. Coe |
Publisher | : |
Total Pages | : 20 |
Release | : 1989 |
Genre | : |
ISBN | : |
Download Comparison of Predicted and Measured Temperatures of UH-60A Helicopter Transmission Book in PDF, ePub and Kindle
The 2109-kW (2828-hp) UH-60A Black Hawk helicopter transmission was one of the transmissions used to obtain an experimental data base. Component improvements or new transmission concepts can thus be evaluated by comparison with the established data. In this investigation the transmission was instrumented internally and tested over a range of operating conditions. The speed was varied from 50 to 100 percent of the full rated value, and the torque was varied from 10 to 100% of the full rated value. Temperatures of internal bearings and gears were measured. The computer program Planetsys was used to simulate the thermal performance of this transmission. The calculated temperatures were then compared with the corresponding measured values. The highest measured temperature was 405 K (270 F) on the outer ring of the high-speed input shaft roller bearing, at the 100% power condition. In general, the predicted temperatures compared very well with the measured values, most of them being within 5 kelvin (9 deg F). Specifically, the temperatures predicted for the single-row spherical roller planetary bearing averaged only about 4 kelvin (8 deg F) lower than the highest measured value. Helicopter rotor transmissions; Planetary gears; Roller bearings. (EDC).
Author | : |
Publisher | : |
Total Pages | : 92 |
Release | : 1990 |
Genre | : Aeronautics |
ISBN | : |
Download NASA Scientific and Technical Publications Book in PDF, ePub and Kindle
Author | : |
Publisher | : |
Total Pages | : 244 |
Release | : 1991 |
Genre | : Aeronautics |
ISBN | : |
Download Scientific and Technical Aerospace Reports Book in PDF, ePub and Kindle
Author | : |
Publisher | : |
Total Pages | : 840 |
Release | : 1989 |
Genre | : Astronautics |
ISBN | : |
Download NASA Technical Paper Book in PDF, ePub and Kindle
Author | : |
Publisher | : |
Total Pages | : 174 |
Release | : 1993 |
Genre | : Aeronautics |
ISBN | : |
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A selection of annotated references to unclassified reports and journal articles that were introduced into the NASA scientific and technical information system and announced in Scientific and technical aerospace reports (STAR) and International aerospace abstracts (IAA).
Author | : |
Publisher | : |
Total Pages | : 592 |
Release | : 1999 |
Genre | : Tribology |
ISBN | : |
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Author | : |
Publisher | : |
Total Pages | : 64 |
Release | : 1989 |
Genre | : Aeronautics |
ISBN | : |
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Publisher | : |
Total Pages | : 316 |
Release | : 1989 |
Genre | : Aeronautics |
ISBN | : |
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