Research papers

Political Turbulence and Aviation Safety: A Cross-National Analysis of Political Stability's Effects on Aviation Accidents

To what extent does political stability affect aviation safety? This research aims to link domestic political conditions and public safety through the consideration of aviation accident frequency.

Comparative Analysis of Aviation and Ground Transportation Safety Standards Applicable to the Integration of Unmanned Aircraft Operations

This study performed a comparative analysis of SMS in both the aviation and ground transportation industries to identify any gaps that may impact aviation safety by incorporating UAS operations within the ground transpor…

NASA research experience on jet aircraft control problems in severe turbulence

NASA research experience on jet aircraft control problems in severe turbulence

NASA research experience on jet aircraft control problems in severe turbulence

Wind tunnel tests, flight simulation tests, and flight tests on jet aircraft control in severe atmospheric turbulence

Fly-by-Wire Flight Control System Experience with a Free-Flight Lunar-Landing Research Vehicle

Ground and flight tests to evaluate lunar landing research vehicle fly-by-wire control system

Unsteady wake effects on progressing/regressing forced rotor flapping modes.

A two bladed 16 inch hingeless rotor model was built and tested outside and inside a 24 by 24 inch wind tunnel test section at collective pitch settings up to 5 deg and rotor advance ratios up to .4.

Aircraft wake turbulence progress and plans

Aircraft wake turbulence and trailing vortices, investigating physical characteristics, hazard potential and avoidance techniques

Discrete rotor noise.

Description of a single unified theory to account generally for the discrete radiation from the whole family of heavily loaded axial flow rotors, including helicopter rotors, propellers, and compressors.

The jumbo jet and public safety.

Safety of jumbo jet aircraft, accident reduction, traffic control, systems safety engineering, landing approach, midair collision prevention and crash survival

Fundamental advancements of the future.

General aviation encompasses all aviation except air carrier and military. This includes a broad spectrum of aircraft types ranging from amateur-built aircraft to jet transports, and includes missions such as transportat…

Concepts for a theoretical and experimental study of lifting rotor random loads and vibrations (further experiments with progressing/regressing rotor flapping modes), Phase 7-C

The experiments with progressing/regressing forced rotor flapping modes have been extended in several directions and the data processing method has been considerably refined.

Analysis of vortex wake encounter upsets

The problem of an airplane being upset by encountering the vortex wake of a large transport on takeoff or landing is currently receiving considerable attention.

A simulator investigation of engine failure compensation for powered-lift STOL aircraft

A piloted simulator investigation of various engine failure compensation concepts for powered-lift STOL aircraft was carried out at the Ames Research Center.

Concepts for a theoretical and experimental study of lifting rotor random loads and vibrations. Phase 6-A: Effects of blade torsion, of blade flap bending flexibility and of rotor support flexibility on rotor stability and random response

The effects of lifting rotor blade torsion, blade flap bending flexibility and rotor support flexibility on rotor stability and random response are described.

Concepts for a theoretical and experimental study of lifting rotor random loads and vibrations. Phase 6-B: Experiments with progressing/regressing forced rotor flapping modes

A two bladed 16-inch hingeless rotor model was built and tested outside and inside a 24 by 24 inch wind tunnel test section at collective pitch settings up to 5 deg and rotor advance ratios up to .4.

Experimental atmospheric absorption values from aircraft flyover noise signals

Analysis of aircraft noise recordings to determine experimental values of atmospheric sound absorption

Fixed-base simulation evaluation of various low-visibility landing systems for helicopters

Fixed base simulation evaluation of one fully automatic and six manual low visibility landing systems for helicopters

Full-scale ground proximity investigation of a VTOL fighter model aircraft

Exhaust gas ingestion characteristics and induced aerodynamics for vertical takeoff lift engine fighter model in ground proximity

Study of flight management requirements during SST low visibility approach and landing operations Final summary report

Flight management operational problems and task requirements for low visibility approach and landing of supersonic transports

Analysis of deep-stall characteristics of T-tailed aircraft configurations and some recovery procedures.

Deep-stall characteristics of T-tailed aircraft configurations and recovery procedures, noting parameters of pitch-up, angle of attack, etc

A simulator study of T-tail aircraft in deep stall conditions.

T tail aircraft in deep stall conditions in fixed- base cockpit simulation at large angle of attack

A parametric study of factors influencing the deep-stall pitch-up characteristics of T-tail transport aircraft

Analog computer program for parametric study of factors influencing deep stall pitch-up characteristics of T-tail transport aircraft

Summary of NASA research on jet transport control problems in severe turbulence.

Wind tunnel, simulator and flight test results to evaluate cockpit accelerations, handling qualities and stability and control of jet transports in severe turbulence

Analysis of an emergency deceleration and descent of the XB-70-1 airplane due to engine damage resulting from structural failure

Analyzing emergency deceleration and descent of XB-70-1 airplane due to engine damage resulting from structural failure for supersonic transport data

Flat-spin recovery system

Spinning technique for low altitude, single parachute recovery system

Summary of nasa research on jet transport control problems in severe turbulence.

Wind tunnel, simulator and flight test results to evaluate cockpit accelerations, handling qualities and stability and control of jet transports in severe turbulence

Determination of Aerodynamic Forces and Control Requirement during Ground Effect

The current work delivers the effect of ground proximity on longitudinal aerodynamic forces and the elevator deflection required for trimming the aircraft.

25. Eagle Aero Sport - Embry-Riddle Student-Built Aircraft

Simulator studies of the deep stall

Simulator studies of aircraft deep-stall problem - pitch control problem

A continuous wave Doppler system for aircraft collision hazard warning

Low-cost pilot indicator for midair collision avoidance

Factors affecting ditching of new transport airplanes

Ditching behavior of dynamic C-5A model

NASA Aircraft Safety and Operating Problems, Volume 1

<p style="text-indent: 25px;">The proceedings of the Conference on NASA Aircraft Safety and Operating Problems held at Langley Research Center, Hampton, Virginia, on May 4-6, 1971, are reported in this NASA Special Publi…