NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Higher harmonic rotor blade pitch controlTests of a model 'Reverse Velocity Rotor' system at high advance ratios and with twice-per-revolution cyclic pitch control were made under joint Navy-NASA sponsorship in the NASA, Ames 12 ft. pressure tunnel. The results showed significant gains in rotor performance at all advance ratios by using twice-per-revolution control. Detailed design studies have been made of alternative methods of providing higher harmonic motion including four types of mechanical systems and an electro-hydraulic system. The relative advantages and disadvantages are evaluated on the basis of stiffness, weight, volume, reliability and maintainability.
Document ID
19770044008
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Ewans, J. R.
(Fairchild Republic Co. Farmingdale, N.Y., United States)
Date Acquired
August 8, 2013
Publication Date
January 1, 1976
Subject Category
Aircraft Design, Testing And Performance
Meeting Information
Meeting: Annual National Forum of the American Helicopter Society
Location: Washington, DC
Start Date: May 10, 1976
End Date: May 12, 1976
Accession Number
77A26860
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available