Accession Number:

ADA289962

Title:

NASA/Army Rotorcraft Transmission Research, A Review of Recent Significant Accomplishments.

Descriptive Note:

Technical memo.,

Corporate Author:

ARMY RESEARCH LAB CLEVELAND OH

Personal Author(s):

• Krantz, Timothy L.

Report Date:

1994-03-01

Pagination or Media Count:

16.0

Abstract:

A joint helicopter transmission research program between NASA Lewis Research Center and the U.S. Army Research Lab has existed since 1970. Research goals are to reduce weight and noise while increasing life, reliability, and safety. These research goals are achieved by the NASAArmy Mechanical Systems Technology Branch through both in-house research and cooperative research projects with university and industry partners. This paper reviews some recent significant technical accomplishments produced by this cooperative research. The following research projects are reviewed oil-off survivability of tapered roller bearings, design and evaluation of high contact ratio gearing, finite element analysis of spiral bevel gears, computer numerical control grinding of spiral bevel gears, gear dynamics code validation, computer program for life and reliability of helicopter transmissions, planetary gear train efficiency study, and the Advanced Rotorcraft Transmission ART program.

Descriptors:

• *COMPUTER PROGRAMS
• *AIRCRAFT EQUIPMENT
• *ROTARY WING AIRCRAFT
• *TRANSMISSIONS(MECHANICAL)
• CONTROL SYSTEMS
• INDUSTRIES
• ARMY RESEARCH
• VALIDATION
• DYNAMICS
• FINITE ELEMENT ANALYSIS
• RESEARCH FACILITIES
• TRANSMITTANCE
• CODING
• RELIABILITY
• ARMY EQUIPMENT
• HELICOPTERS
• COMPUTER APPLICATIONS
• LABORATORIES
• ROLLER BEARINGS
• TAPER
• NUMERICAL METHODS AND PROCEDURES
• GEARS
• GRINDING
• ARMY AIRCRAFT
• MECHANICAL COMPONENTS

Subject Categories:

• Helicopters
• Computer Programming and Software

Distribution Statement:

APPROVED FOR PUBLIC RELEASE