Author: National Aeronautics and Space Administration (NASA) Publisher: Createspace Independent Publishing Platform ISBN: 9781726163439 Category : Languages : en Pages : 40
Book Description
Ongoing human-response studies of sonic-boom noise indicated that a previous level of 1.0 psf might still be too annoying. This led to studies of a Supersonic Business Jet (SBJ), which might generate lower, more acceptable ground overpressures. To determine whether methods for designing a High Speed Civil Transport (HSCT) could be successfully applied, a SBJ concept was designed at the langley Research Center. It would cruise at Mach 2, carry 10 passengers for 4000 nautical miles, and generate a 0.50 psf or less on the ground under the flight path at start of cruise. Results indicated that a 10-passenger, low-boom SBJ design was just as technically demanding as a 300-passenger, low-boom HSCT design. In this report, the sources of these technical problems are identified, and ideas for addressing them are discussed.Mack, Robert J.Langley Research CenterSONIC BOOMS; SUPERSONIC TRANSPORTS; AIRCRAFT DESIGN; SUPERSONIC JET FLOW; CIVIL AVIATION; HUMAN REACTIONS; PASSENGERS...
Author: Robert J. Mack Publisher: BiblioGov ISBN: 9781289144029 Category : Languages : en Pages : 44
Book Description
Ongoing human-response studies of sonic-boom noise indicated that a previous level of 1.0 psf might still be too annoying. This led to studies of a Supersonic Business Jet (SBJ), which might generate lower, more acceptable ground overpressures. To determine whether methods for designing a High Speed Civil Transport (HSCT) could be successfully applied, a SBJ concept was designed at the langley Research Center. It would cruise at Mach 2, carry 10 passengers for 4000 nautical miles, and generate a 0.50 psf or less on the ground under the flight path at start of cruise. Results indicated that a 10-passenger, low-boom SBJ design was just as technically demanding as a 300-passenger, low-boom HSCT design. In this report, the sources of these technical problems are identified, and ideas for addressing them are discussed.
Author: National Research Council Publisher: National Academies Press ISBN: 0309082773 Category : Technology & Engineering Languages : en Pages : 128
Book Description
High-speed flight is a major technological challenge for both commercial and business aviation. As a first step in revitalizing efforts by the National Aeronautics and Space Administration (NASA) to achieve the technology objective of high-speed air travel, NASA requested the National Research Council (NRC) to conduct a study that would identify approaches for achieving breakthroughs in research and technology for commercial supersonic aircraft. Commercial Supersonic Technology documents the results of that effort. This report describes technical areas where ongoing work should be continued and new focused research initiated to enable operational deployment of an environmentally acceptable, economically viable commercial aircraft capable of sustained supersonic flight, including flight over land, at speeds up to approximately Mach 2 in the next 25 years or less.
Author: Michael Hans-Reichel Publisher: diplom.de ISBN: 3842828098 Category : Science Languages : en Pages : 112
Book Description
Inhaltsangabe:Introduction: On the 26th of August 2010 the new ultra-large-cabin ultra-long-range Gulfstream G650 business jet reached Mach 0.995 during its flight test campaign (1). This is almost the speed of sound (Mach 1) and inspires one to say, why not fly faster than the speed of sound! Reduce travelling time in the commercial business aviation segment. This is, however not a completely new vision. Many companies and research facilities have already spent a lot of time and investment in studies to investigate the feasibility of supersonic flight. Entry Into Service (EIS) for the new Gulfstream G650 is scheduled for 2012. In the following the main performance parameter of the G650 aircraft will be summarised. The parameters range, cruise speed, MTOW, etc. have been selected and serve as a basis to allow an appropriate comparison between the G650 as the latest high end Subsonic Business Jet and potential in future Supersonic Business Jets (SSBJ) within this subject Master Thesis. With the impressive maximum range of nearly 13,000 km the G650 can connect Dubai with New York or London with Buenos Aires within almost 14 hours. Maximum Range @ Normal Cruise Speed: 7,000 nm/12,964 km. Normal Cruise Speed Mach: 0.85/904 km/h. Mmo (Maximum Operating Mach Number): Mach 0.925. Maximum Cruise Altitude: 51,000 ft/15,545 m. Maximum Takeoff Weight (MTOW): 99,600 lb/45,178 kg. Maximum Fuel Weight: 44,200 lb/20,049 kg. Passengers: 11 18. Price: appr. 60-70 million USD. Gulfstream business rival Bombardier Aerospace also announced in October 2010 two new high end models, the Global 7000 and 8000 with a maximum range of 7,300 nm (13,520 km) and 7,900 nm (14,631 km) at cruise speed Mach 0.85. Entry Into Service is scheduled for 2016 (Global 7000) and 2017 (Global 8000). A comprehensive overview of business jets in service and in development is given in attachment 13.1. A Supersonic Business Jet flying at Mach 2 cruise speed could virtually halve the travelling time, which would enormously enhance the mobility and flexibility. In order to achieve this ambition a paradigm shift is required. New technologies must be established, the impact on the environment must be understood and minimised, existing regulations must be changed to permit overland flight restrictions and the product still needs to be economically viable. All of the above aspects must be considered and will be subject for discussion within this Master Thesis (See also figure [...]
Author: National Ae Space Administration (Nasa) Publisher: ISBN: 9781078218856 Category : Languages : en Pages : 144
Book Description
This unique book reproduces important NASA, FAA, and other government documents, reports, and studies about the history and current state of supersonic passenger aircraft and SST travel. Updated through June 2019 with the latest information, there is extensive technical coverage of the ongoing NASA Low Boom Flight Demonstrator X-59 QueSST (LBFD) Project, a new X-plane that will test its quiet supersonic technologies by flying over communities in the United States. X-59 is designed so that when flying supersonic, people on the ground will hear nothing more than a quiet sonic thump - if anything at all.Contents: NASA Low Boom Flight Demonstrator X-59 QueSST (LBFD) Project * Part One: Overview * Part Two: Budget Presentation * Part Three: X-59 Life Support and Crew Escape System Design Challenges * Part 4: Zoom without the Boom * Part 5: Human Response to Sonic Booms * Part 6: Supersonic Passenger Flights / 2018 Research Report * Part 7: FAA Fact Sheet - Supersonic Flight * Part 8: What Happened to the American SST?Four decades have passed since the first trans-oceanic supersonic passenger flight took off from London Heathrow Airport in 1976. Subsequently, more than 2.5 million passengers flew supersonically until British Airways and Air France took the Concorde out of service in 2003. Although no supersonic passenger aircraft have flown since then, aviation enthusiasts, aircraft and parts manufacturers, airlines, and some Members of Congress have expressed interest in restarting supersonic air travel. Several U.S. startup companies are now developing supersonic commercial and business jets. The major issues affecting the introduction of supersonic aircraft appear to remain the same as in the Concorde era-how to translate technological advances into commercial ventures that are economically viable and acceptable to regulators and the public. Gaining international consensus and approvals to fly supersonically over other countries besides the United States may be a critical element in determining the market viability of future civil supersonic aircraft designs. International agreements would also need to address permissible conditions for supersonic flight operations over water and over polar regions that have opened up to civil aircraft operations over the past decade and offer shorter flights between the United States and Asia. Companies currently developing SSTs have stated that they envision flight ranges of about 4,000 to 6,000 nautical miles. These ranges would comfortably allow for flights between much of the east coast of the United States and key European destinations like London and Paris, with typical time savings of around two hours. However, several trans-Pacific routes, routes from western U.S. cities to Europe, and flights from the United States to Africa or the Middle East would require refueling stops. Developers envision that, even with hour-long service stops to take on fuel, the time savings could be substantial, typically cutting about one-third off of total travel time.The revival of interest in supersonic aircraft is the result of technological advances in materials, airframe and engine designs, and aircraft manufacturing that would be able to give the aircraft longer range through improved fuel efficiency and substantial weight savings with advanced composites and aerodynamics. Denver-based Boom Technology has announced plans to test a supersonic 2-seat demonstrator by the end of 2019, and aims to deliver its first supersonic aircraft to an airline as early as 2025. In November 2016, Virgin Group, an airline operator, took purchase options for 10 of Boom's proposed Mach 2.2 aircraft. Japan Airlines (JAL) invested $10 million in Boom and took purchase options on 20 planes in December 2017.
Author: C. W. Nixon Publisher: ISBN: Category : Sonic boom Languages : en Pages : 36
Book Description
Sonic booms generated by F-4C aircraft flying low-level terrain- following profiles during Joint Task Force II operations near Tonopah, Nevada, were recorded under and near the flight tracks, and responses of structures, animals, and people were observed. Recorded overpressures up to 144 psf were analyzed, correlated with available aircraft operations data, and compared with data from different aircraft flying similar profiles. Observations of structures, animals, and people were correlated with the measured overpressures. Results include acquisition of near-field recordings of overpressures generated by the F-4C, the finding that some window glass fragments were propelled a short distance rather than falling directly below the window, an instance in which the measured overpressure of a sonic boom 1 mile to the side of the track far exceeded the predicted value, the finding that livestock (undetermined prior exposure to acoustic stimuli in this situation) did not respond adversely to the sonic booms, confirmation that very intense sonic booms do not harm people directly and the reaffirmation that the selection of site locations for low- level supersonic training missions will continue to pose a problem.
Author: Egbert Torenbeek Publisher: John Wiley & Sons ISBN: 1119667046 Category : Technology & Engineering Languages : en Pages : 168
Book Description
Provides comprehensive coverage of how supersonic commercial aircraft are designed This must-have guide to conceptual supersonic aircraft design provides a state-of-the art overview of the subject, along with expert analysis and discussion. It examines the challenges of high-speed flight, covers aerodynamic phenomena in supersonic flow and aerodynamic drag in cruising flight, and discusses the advantages and disadvantages of oblique wing aircraft. Essentials of Supersonic Commercial Aircraft Conceptual Design is intended for members of a team producing an initial design concept of an airliner with the capability of making supersonic cruising flights. It begins with a synopsis of the history of supersonic transport aircraft development and continues with a chapter on the challenges of high-speed flight, which discusses everything from top level requirements and cruise speed requirements to fuel efficiency and cruise altitude. It then covers weight sensitivity; aerodynamic phenomena in supersonic flow; thin wings in two-dimensional flow; flat wings in inviscid supersonic flow; aerodynamic drag in cruising flight, and aerodynamic efficiency of SCV configurations. The book finishes with a chapter that examines oblique wing aircraft. Provides supersonic aircraft designers with everything they need to know about developing current and future high speed commercial jet planes Examines the many challenges of high-speed flight Covers aerodynamic phenomena in supersonic flow and aerodynamic drag in cruising flight Discusses the advantages and disadvantages of oblique wing aircraft Essentials of Supersonic Commercial Aircraft Conceptual Design is an ideal book for researchers and practitioners in the aerospace industry, as well as for graduate students in aerospace engineering.
Author: John Orin Powers Publisher: ISBN: Category : Sonic boom Languages : en Pages : 24
Book Description
An attempt was made to outline the historical development of the United States supersonic transport development program and to place in proper perspective the national significance of the SST program. The technological aspects and problems of the sonic boom were reviewed. The actual overflight sonic boom programs to date were reviewed and capsule results were discussed.
Author: National Aeronautics and Space Administration (NASA)
Author: Robert J. Mack
Author: National Research Council
Author: Lawrence R. Benson
Author: Michael Hans-Reichel
Author: National Ae Space Administration (Nasa)
Author: C. W. Nixon
Author: Egbert Torenbeek
Author: John Orin Powers
Author: Joseph R. Chambers