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Book Piloted Simulation Study of a Dual Thrust Cutback Procedure for Reducing High Speed Civil Transport Takeoff Noise Levels

Download or read book Piloted Simulation Study of a Dual Thrust Cutback Procedure for Reducing High Speed Civil Transport Takeoff Noise Levels written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-03 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: A piloted simulation study was performed for the purpose of indicating the noise reduction benefits and piloting performance that could occur for a typical 4-engine high-Speed Civil Transport (HSCT) configuration during takeoff when a dual thrust-cutback procedure was employed with throttle operation under direct computer control. Two thrust cutbacks were employed with the first cutback performed while the vehicle was accelerating on the run-way and the second cutback performed at a distance farther downrange. Added vehicle performance improvements included the incorporation of high-lift increments into the aerodynamic database of the vehicle and the use of limited engine oversizing. Four single-stream turbine bypass engines that had no noise suppression of any kind were used with this configuration. This approach permitted establishing the additional noise suppression level that was needed to meet Federal Air Regulation Part 36 Stage 3 noise levels for subsonic commercial jet aircraft. Noise level results were calculated with the jet mixing and shock noise modules of the Aircraft Noise Prediction Program (ANOPP).Riley, Donald R. and Glaab, Louis J. and Brandon, Jay M. and Person, Lee H., Jr. and Glaab, Patricia C.Langley Research CenterSIMULATION; TAKEOFF; AERODYNAMIC NOISE; NOISE REDUCTION; HIGH SPEED; CIVIL AVIATION; LIFT; DATA BASES; JET MIXING FLOW; COMMERCIAL AIRCRAFT; SUPERSONIC TRANSPORTS; NUMERICAL CONTROL; NOISE PREDICTION (AIRCRAFT)

Book Piloted Simulation Study of a Dual Thrust Cutback Procedure for Reducing High Speed Civil Transport Takeoff Noise Levels

Download or read book Piloted Simulation Study of a Dual Thrust Cutback Procedure for Reducing High Speed Civil Transport Takeoff Noise Levels written by and published by . This book was released on 1999 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: A piloted simulation study was performed for the purpose of indicating the noise reduction benefits and piloting performance that could occur for a typical 4-engine high-Speed Civil Transport (HSCT) configuration during takeoff when a dual thrust-cutback procedure was employed with throttle operation under direct computer control. Two thrust cutbacks were employed with the first cutback performed while the vehicle was accelerating on the run-way and the second cutback performed at a distance farther downrange. Added vehicle performance improvements included the incorporation of high-lift increments into the aerodynamic database of the vehicle and the use of limited engine oversizing. Four single-stream turbine bypass engines that had no noise suppression of any kind were used with this configuration. This approach permitted establishing the additional noise suppression level that was needed to meet Federal Air Regulation Part 36 Stage 3 noise levels for subsonic commercial jet aircraft. Noise level results were calculated with the jet mixing and shock noise modules of the Aircraft Noise Prediction Program (ANOPP).

Book Piloted Simulation Assessment of a High Speed Civil Transport Configuration

Download or read book Piloted Simulation Assessment of a High Speed Civil Transport Configuration written by and published by . This book was released on 2002 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt: An assessment of a proposed configuration of a high-speed civil transport was conducted by using NASA and industry research pilots. The assessment was conducted to evaluate operational aspects of the configuration from a pilot's perspective, with the primary goal being to identify potential deficiencies in the configuration. The configuration was evaluated within and at the limits of the design operating envelope to determine the suitability of the configuration to maneuver in a typical mission as well as in emergency Or envelope-limit conditions. The Cooper-Harper rating scale was used to evaluate the flying qualities of the configuration. A summary flying qualities metric was also calculated. The assessment was performed in the Langley six-degree-of-freedom Visual Motion Simulator. The effect of a restricted cockpit field-of-view due to obstruction by the vehicle nose was not included in this study.

Book Piloted Simulation Study of the Effects of High Lift Aerodynamics on the Takeoff Noise of a Representative High Speed Civil Transport

Download or read book Piloted Simulation Study of the Effects of High Lift Aerodynamics on the Takeoff Noise of a Representative High Speed Civil Transport written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-03 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: As part of an effort between NASA and private industry to reduce airport-community noise for high-speed civil transport (HSCT) concepts, a piloted simulation study was initiated for the purpose of predicting the noise reduction benefits that could result from improved low-speed high-lift aerodynamic performance for a typical HSCT configuration during takeoff and initial climb. Flight profile and engine information from the piloted simulation were coupled with the NASA Langley Aircraft Noise Prediction Program (ANOPP) to estimate jet engine noise and to propagate the resulting source noise to ground observer stations. A baseline aircraft configuration, which also incorporated different levels of projected improvements in low-speed high-lift aerodynamic performance, was simulated to investigate effects of increased lift and lift-to-drag ratio on takeoff noise levels. Simulated takeoff flights were performed with the pilots following a specified procedure in which either a single thrust cutback was performed at selected altitudes ranging from 400 to 2000 ft, or a multiple-cutback procedure was performed where thrust was reduced by a two-step process. Results show that improved low-speed high-lift aerodynamic performance provides at least a 4 to 6 dB reduction in effective perceived noise level at the FAA downrange flyover measurement station for either cutback procedure. However, improved low-speed high-lift aerodynamic performance reduced maximum sideline noise levels only when using the multiple-cutback procedures.Glaab, Louis J. and Riley, Donald R. and Brandon, Jay M. and Person, Lee H., Jr. and Glaab, Patricia C.Langley Research CenterPILOT SUPPORT SYSTEMS; COMPUTERIZED SIMULATION; TAKEOFF; NOISE INTENSITY; AERODYNAMIC NOISE; AIRCRAFT CONFIGURATIONS; NOISE PREDICTION (AIRCRAFT); NOISE REDUCTION; LIFT; JET AIRCRAFT NOISE; HIGH SPEED; CIVIL AVIATION; FLIGHT PATHS; GROUND STATIONS; DOWNRANGE MEASUREMENT

Book Piloted Simulation Study of the Effects of High Lift Aerodynamics on the Takeoff Noise of a Representative High Speed Civil Transport

Download or read book Piloted Simulation Study of the Effects of High Lift Aerodynamics on the Takeoff Noise of a Representative High Speed Civil Transport written by and published by . This book was released on 1999 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book NASA Langley Scientific and Technical Information Output 1999

Download or read book NASA Langley Scientific and Technical Information Output 1999 written by and published by . This book was released on 2000 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Initial Piloted Simulation Evaluation of the Reference H High Speed Civil Transport Design During Takeoff and Recovery From Limit Flight Conditions

Download or read book Initial Piloted Simulation Evaluation of the Reference H High Speed Civil Transport Design During Takeoff and Recovery From Limit Flight Conditions written by and published by . This book was released on 1999 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Parametric Study of STOL Short haul Transport Engine Cycles and Operational Techniques to Minimize Community Noise Impact

Download or read book Parametric Study of STOL Short haul Transport Engine Cycles and Operational Techniques to Minimize Community Noise Impact written by and published by . This book was released on 1974 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effect of aircraft operational techniques in the terminal area on community noise impact of future short-haul aircraft was investigated. These operational techniques affected altitude, flap retraction rate, thrust cutback altitude, amount of thrust cutback, and amount of turning. During landing the parameters varied were glide slope angle, change in slope angle (two segment approach), and flap extension rate. One mechanical-flap (MF) aircraft and one externally-blown-flap (EBF) aircraft were used to study by noise impact at four U.S. airports, Hanscom Field (Boston); Washington National; Midway (Chicago); and Orange County (California). With the exception of Washington National (DCA), the study showed that a reduction of approximately 40 percent in the number of people highly annoyed (as defined in the study) can be obtained by using these operational techniques. At DCA the number of people highly annoyed using the standard procedure was quite low, but it is significant that the minimumimpact case for Runway 36 reduced the number of people highly annoyed to zero using a power cutback and a turning departure path. The evaluation procedures and methodology developed in this study represents an advance in acoustical state-of-the-art and should provide an effective and useful tool for determining aircraft noise impact upon the airport community.

Book Taxiing Take off and Landing Simulation of the High Speed Civil Transport Aircraft

Download or read book Taxiing Take off and Landing Simulation of the High Speed Civil Transport Aircraft written by Mercedes C. Reaves and published by . This book was released on 1999 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Noise Exposure Reduction of Advanced High lift Systems

Download or read book Noise Exposure Reduction of Advanced High lift Systems written by and published by . This book was released on 1995 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Piloted Simulation Study of the Effects of an Automated Trim System on Flight Characteristics of a Light Twin engine Airplane with One Engine Inoperative

Download or read book Piloted Simulation Study of the Effects of an Automated Trim System on Flight Characteristics of a Light Twin engine Airplane with One Engine Inoperative written by and published by . This book was released on 1986 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: