The impact of urban operations on helicopter noise requirements [PDF]
The interrelationship of urban helicopter operations, helicopter noise, and the establishment of urban public-use heliports is discussed. Public resistance to urban helicopter operations due to concern for safety and noise is shown to negatively impact ...
Spector, S. R.
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Comparison of predicted engine core noise with proposed FAA helicopter noise certification requirements [PDF]
Calculated engine core noise levels, based on NASA-Lewis prediction procedures, for five representative helicopter engines are compared with measured total helicopter noise levels and proposed FAA helicopter noise certification requirements.
Groesbeck, D. E., Vonglahn, U.
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Finite difference time domain grid generation from AMC helicopter models [PDF]
A simple technique is presented which forms a cubic grid model of a helicopter from an Aircraft Modeling Code (AMC) input file. The AMC input file defines the helicopter fuselage as a series of polygonal cross sections. The cubic grid model is used as an
Cravey, Robin L.
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Progress through precedent: Going where no helicopter simulator has gone before [PDF]
Helicopter simulators have been approved by means of special exemption; there are no FAA standards for simulators used in training or airmen Certification checking.
Adams, Richard J.
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NASA/HAA Advanced Rotorcraft Technology and Tilt Rotor Workshops. Volume 2: Operators' Views [PDF]
A special panel of helicopter users give presentations in 12 basic areas of helicopter applications.
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Design study of Self-Alining Bearingless Planetary (SABP) gear [PDF]
The feasibility of using the self alining, bearingless planetary (SABP) transmission in an uprated version of the OH-58 helicopter was evaluated, specific performance comparisons of this new transmission with contemporary helicopter transmission systems ...
Folenta, D. J.
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The UH-1H helicopter icing flight test program: An overview [PDF]
An ongoing joint NASA/Army program to study the effects of ice accretion on unprotected helicopter rotor aerodynamic performance is discussed. This program integrates flight testing, wind tunnel testing, and analytical modeling. Results are discussed for
Richter, G. P., Shaw, R. J.
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A rotorcraft flight database for validation of vision-based ranging algorithms [PDF]
A helicopter flight test experiment was conducted at the NASA Ames Research Center to obtain a database consisting of video imagery and accurate measurements of camera motion, camera calibration parameters, and true range information.
Smith, Phillip N.
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A real-time digital computer program for the simulation of a single rotor helicopter [PDF]
A computer program was developed for the study of a single-rotor helicopter on the Langley Research Center real-time digital simulation system. Descriptions of helicopter equations and data, program subroutines (including flow charts and listings), real ...
Gibson, L. H. +2 more
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