NDLI: Concepts for multi-speed rotorcraft drive system - status of design and testing at nasa grc (Document No: 20150010212)

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Concepts for multi-speed rotorcraft drive system - status of design and testing at nasa grc (Document No: 20150010212)

Content Provider	NASA Technical Reports Server (NTRS)
Author	Handschuh, Robert F. Lewicki, David G. Stevens, Mark A.
Copyright Year	2015
Description	In several studies and on-going developments for advanced rotorcraft, the need for variable multi-speed capable rotors has been raised. Speed changes of up to 50 have been proposed for future rotorcraft to improve vehicle performance. A rotor speed change during operation not only requires a rotor that can perform effectively over the operating speedload range, but also requires a propulsion system possessing these same capabilities. A study was completed investigating possible drive system arrangements that can accommodate up to a 50 speed change. Key drivers were identified from which simplicity and weight were judged as central. This paper presents the current status of two gear train concepts coupled with the first of two clutch types developed and tested thus far with focus on design lessons learned and areas requiring development. Also, a third concept is presented, a dual input planetary differential as leveraged from a simple planetary with fixed carrier.
File Size	1380344
Page Count	27
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20150010212
Archival Resource Key	ark:/13960/t9x113p9x
Language	English
Publisher Date	2015-05-05
Access Restriction	Open
Subject Keyword	Transmission Variable-speed Drive Rotorcraft Gear Two-speed Multi-speed Propulsion Helicopter Performance Tests Gears Propulsion System Performance Rotor Speed Rotary Wing Aircraft Clutches Design Analysis Mechanical Drives Propulsion System Configurations Transmissions Machine Elements Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Presentation

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