Three-track runway elevation profiles measured at two United States Government installations
Three-track airport runway elevation profiles and airplane response to runway roughness
Morris, G. J.↗
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The status of VTOL and STOL transport development
VSTOL and STOL transport development concerning aircraft types, air traffic control and navigation, airports, etc
Barriage, J. B.↗
Meteorological aspects of the aircraft noise problem
Meteorological problems associated with proposed tests for aircraft noise certification, discussing airport near-surface environments
Chang, D. T.↗
Optimal transition from entry to cruising flight
Optimal angle of attack transition trajectories for space shuttle from atmospheric entry to cruising flight for conventional airport landing
Stengel, R. F.↗
The NASA acoustically treated nacelle program
NASA acoustically treated nacelle program reducing noise under commercial transport flight path near airports
Lowry, J. G.↗
Some aspects of the aerodynamics of STOL ports
Wind pressure and cross flow velocity profiles for short takeoff aircraft building roof airports
Blanton, J. N.↗
Evaluation of measures of aircraft noise
Development of noise measurement units for airport and aircraft noise reduction and psychoacoustic studies
Chambers, R. M.↗
Future air traffic - A study of the terminal area
Systems analysis approach to airport planning and predicting terminal facility and aircraft demands in year 2000 for air traffic control systems
Andry, A. N.↗
The promise of aeronautics
Socioeconomic changes in aeronautics, discussing faster long range aircraft, airport access problems, technological advances, short haul transportation and industry/government relations
Roberts, L.↗
The CARD Study - What is its impact
Civil aviation research and development policy review covering aircraft noise, congestion, ATC, runway capacity and airport development problems
Syvertson, C. A.↗
Automatic lightning location system
Hyperbolic triangulation method was used for locating lightning storm path and position from VHF lightning charge emissions. Possible applications in electric power companies, forest fire lookout centers, airports, and pipeline companies are indicated.
Holdsworth, T.↗
Investigation of an aircraft trailing vortex using a tuft grid
With the increasing capacity of airport terminal areas, and the use of the new large jet transports, it has become important to understand the turbulent wake created by these aircraft. A study of the trailing vortex of a wing has been made using a tuft grid in a 6 foot wind tunnel. The study included an investigation of the use of mass injection at the wing tip as a means of destroying the vortex. Test results show that a fully developed, stable, vortex exists at least a distance of thirty chord lengths downstream of the wing, and that the swirl of the vortex can be reduced or eliminated by mass injection at the wing tip.
Mason, W. H.↗
Noise reductions achieved on a 720-023B aircraft using a two-segment approach
A flight investigation to determine the operational feasibility of two-segment approaches as a means for reducing airport community noise has been conducted. The effective perceived noise level (EPNL) associated with these approach profiles, using a 720-023B jet aircraft, has been obtained. The tests were designed to determine an operationally optimum approach profile and to quantify the reduction in noise level at predetermined locations on the ground beneath the flight track. The acoustic aspects of the test program are examined. An analysis of the optimum and reference profiles was made using a group of pilots. Information was also obtained on the types of pilot operational procedures used for the optimum profile.
Glass, R. E.↗
Preliminary evaluation of the effect of a dynamic preferential runway system upon community noise disturbance
A dynamic preferential runway system (DPRS) was developed for John F. Kennedy International Airport for the purpose of controlling short term noise exposure in the neighboring communities. The DPRS is a computer-aided procedure for optimum selection of runways from the standpoint of noise and is based upon a community disturbance model which takes into account flyover levels, size of exposed populations, time of day and week, and persistence of overflights. A preliminary evaluation of the DPRS is presented on the basis of social survey data and telephone complaint records, for the trial period of August and September, 1971. Comparative use is made of data taken in a previous survey of the same community areas in 1969.
Patterson, H. P.↗
Terminal-area flight procedures and route design for supersonic transport New York-transatlantic operations
The results of an analytical investigation of two departure and arrival transition procedures between John F. Kennedy International Airport and projected North Atlantic track systems for supersonic transport (SST) operations are presented. The procedures studied were: (1) separated departure and arrival transition routes with departures made at supersonic speeds, and (2) superimposed departure and arrival routes with departures restricted to subsonic speed until the airplane is on the track system. For both procedures, transition routes with intercept angles of 30 deg to 90 deg to both six-and four-track systems were investigated. Track spacings of 30 and 60 nautical miles were studied.
Sawyer, R. H.↗
Water landing characteristics of a model of a winged reentry vehicle
Proposed manned space shuttle vehicles are expected to land on airport runways. In an emergency situation, however, the vehicle may be required to land on water. A 1/10-scale dynamic model of a winged reentry vehicle was investigated to determine the water landing characteristics. Two configurations of the proposed vehicle were studied. Configuration 1 had a 30 deg negative dihedral of the stabilizer-elevon surface whereas configuration 2 had a 30 deg positive dihedral. Results indicate that the maximum normal accelerations for configurations 1 and 2 when landing in calm water were approximately 8g and 6g, respectively, and the maximum longitudinal accelerations were approximately 5g and 3g, respectively. A small hydroflap was needed to obtain satisfactory calm-water landings with configuration 2, whereas configuration 1 gave good landings without a hydroflap. All landings made in rough water resulted in unsatisfactory motions. For landings made in three different wave sizes, both configurations dived. The maximum normal accelerations for configurations 1 and 2 when landing in waves were -10.1g and -18.7g, respectively, and the maximum longitudinal accelerations for both configurations were approximately 13g.
Stubbs, S. M.↗
Fixed base simulator study of an externally blown flap STOL transport airplane during approach and landing
A fixed-base simulator study was conducted to determine the flight characteristics of a representative STOL transport having a high wing and equipped with an external-flow jet flap in combination with four high-bypass-ratio fan-jet engines during the approach and landing. Real-time digital simulation techniques were used. The computer was programed with equations of motion for six degrees of freedom and the aerodynamic inputs were based on measured wind-tunnel data. A visual display of a STOL airport was provided for simulation of the flare and touchdown characteristics. The primary piloting task was an instrument approach to a breakout at a 200-ft ceiling with a visual landing.
Grantham, W. D.↗
Operating systems in the air transportation environment.
Consideration of the problems facing air transport at present, and to be expected in the future. In the Northeast Corridor these problems involve community acceptance, airway and airport congestion and delays, passenger acceptance, noise reduction, and improvements in low-density short-haul economics. In the development of a superior short-haul operating system, terminal-configured vs cruise-configured vehicles are evaluated. CTOL, STOL, and VTOL aircraft of various types are discussed. In the field of noise abatement, it is shown that flight procedural techniques are capable of supplementing ?quiet engine' technology.
Cherry, G. W.↗