NDLI: The 3600 hp split-torque helicopter transmission

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The 3600 hp split-torque helicopter transmission

Content Provider	NASA Technical Reports Server (NTRS)
Author	White, G.
Copyright Year	1985
Description	Final design details of a helicopter transmission that is powered by GE twin T 700 engines each rated at 1800 hp are presented. It is demonstrated that in comparison with conventional helicopter transmission arrangements the split torque design offers: weight reduction of 15%; reduction in drive train losses of 9%; and improved reliability resulting from redundant drive paths between the two engines and the main shaft. The transmission fits within the NASA LeRC 3000 hp Test Stand and accepts the existing positions for engine inputs, main shaft, connecting drive shafts, and the cradle attachment points. One necessary change to the test stand involved gear trains of different ratio in the tail drive gearbox. Progressive uprating of engine input power from 3600 to 4500 hp twin engine rating is allowed for in the design. In this way the test transmission will provide a base for several years of analytical, research, and component development effort targeted at improving the performance and reliability of helicopter transmission.
File Size	2890133
Page Count	95
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19870002355
Archival Resource Key	ark:/13960/t22c3wp6h
Language	English
Publisher Date	1985-12-18
Access Restriction	Open
Subject Keyword	Aircraft Propulsion And Power Equipment Specifications Stress Analysis Gears Noise Reduction Helicopters Torque Converters Weight Reduction Structural Design Criteria Helicopter Performance Transmissions Machine Elements Aerodynamic Loads Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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