scholarly journals Conceptual design of high speed supersonic aircraft: A brief review on SR-71 (Blackbird) aircraft

2014 ◽  
Author(s):  
Hui Xue ◽  
H. Khawaja ◽  
M. Moatamedi
Keyword(s):  
Conceptual Design ◽  
High Speed ◽  
Supersonic Aircraft

Conceptual Design Investigations of a Very High Speed Transpacific Container Vessel

2001 ◽  
Author(s):  
Grant E Hearn ◽  
◽  
Ivo J S Veldhuis ◽  
Riaan van 't Veer ◽  
Robert Jan Steenbergen ◽  
...  
Keyword(s):  
Conceptual Design ◽  
High Speed ◽  
Very High

Il costo dell'Alta Velocitŕ ferroviaria in Italia

2009 ◽  
pp. 203-251
Author(s):  
Claudio Virno
Keyword(s):  
Risk Assessment ◽  
Conceptual Design ◽  
Cost Estimation ◽  
High Speed ◽  
Cost Effective ◽  
Lessons Learned ◽  
High Speed Rail ◽  
Cost Overruns ◽  
Front End ◽  
Complex Projects

- Cost overruns are common in large and complex projects, especially in high speed rail ones. Budgeting for cost escalation is a major issue in the planning phase of these projects. This paper describes lessons learned on high speed rail in Italy and focuses on problems such as initial poor design, tactical budgeting, inadequate cost estimation and risk assessment, etc. The paper discusses possible means to avoid major flaws in the initial conceptual design of mega-projects. There is a growing understanding of the need to focus on the front-end phase in order to achieve more successful and cost-effective projects.

Innovative Multiple Matching Charts approach to support the conceptual design of hypersonic vehicles

2020 ◽  
Vol 234 (12) ◽  
pp. 1893-1912
Author(s):  
Davide Ferretto ◽  
Roberta Fusaro ◽  
Nicole Viola
Keyword(s):  
Conceptual Design ◽  
High Speed ◽  
Graphical Representation ◽  
Weight Ratio ◽  
Transportation Systems ◽  
Flight Vehicles ◽  
Performance Requirements ◽  
Reference Vehicle ◽  
Vehicle Configuration ◽  
Definition Of

Several well-established best practices and reliable tools have been developed along the years to support aircraft conceptual and preliminary design. In this context, one of the most widely used tool is the Matching Chart (MC), a graphical representation of the different performance requirements (curves representing the thrust-to-weight ratio (T/W) requirement as function of the wing loading (W/S)) for each mission phase. The exploitation of this tool allows the identification of a feasible design space as well as the definition of a reference vehicle configuration in terms of maximum thrust, maximum take-off weight, and wing surface since the very beginning of the design process. Although the tool was originally developed for conventional aircraft, several extensions and updates of the mathematical models have been proposed over the years to widen its application to innovative configurations. Following this trend, this paper presents a further evolution of the MC model to support the conceptual design of high-speed transportation systems, encompassing supersonic and hypersonic flight vehicles. At this purpose, this paper reports and discusses the updates of the methodology laying behind the generation of the MC for high-speed transportation. Eventually, the results of the validation of the updated methodology and tool are reported, using as case study, the STRATOFLY MR3 vehicle configuration, a Mach 8 antipodal civil transportation system, currently under development within the H2020 STRATOFLY project.

NASA’s HSCT — Past and Future Prospects

2000 ◽  
Author(s):  
Robert A. Mercure
Keyword(s):  
Travel Time ◽  
High Speed ◽  
Far East ◽  
Supersonic Transport ◽  
Supersonic Aircraft ◽  
Advanced Technologies ◽  
The Far East ◽  
Market Impacts ◽  
Speed Range ◽  
The Government

With the termination of the government/industry partnership on the High Speed Civil Transport (HSCT) program in late 1998, the prospects for a U.S. SuperSonic Transport (SST) appears uncertain. However, NASA’s goal of “Reducing travel time to the Far East and Europe by 50% within 25 years” remains intact. The decision by industry to build an HSCT has been postponed and there is now more time to explore advanced technologies and revolutionary concepts that could make a supersonic aircraft an environmentally compatible and economically viable success. Studies will likely continue to examine future constraints regarding flight speed, range, size, market impacts and economics. The technology challenges may appear formidable, but the potential revenue generated and the benefits realized in reduced travel time by an HSCT will provide the incentive to continue the research.

Conceptual Design and Model Tests for a Mid-Water Floating Hyperloop Tunnel

2020 ◽  
Author(s):  
L. J. Kemp ◽  
W. J. Otto ◽  
O. J. Waals
Keyword(s):  
Conceptual Design ◽  
High Speed ◽  
Optical Measurement ◽  
Model Tests ◽  
Scale Model ◽  
Mooring Line ◽  
Mooring System ◽  
Tunnel Length ◽  
Greenhouse Gasses ◽  
Global Emission

Abstract Aviation has a significant impact on the global emission of greenhouse gasses. On the Northern Atlantic route alone there are over 2,500 crossings daily. This illustrates the high demand for connecting people. It is expected that this demand will only increase in the future, which will increase the emissions due to aviation even further. An alternative way for connecting people can be the hyperloop, which obtains comparable speeds while using a fraction of the energy. For intercontinental connections a tunnel would be necessary. In this study, a conceptual design of a mid-water floating hyperloop tunnel is made and tested on model scale at MARIN. In the present paper the results are discussed of model tests on a mid-water floating tunnel in Atlantic storm conditions at various wave directions and tunnel depths. The conceptual design of the tunnel is based on (nearly) available technology. One kilometer tunnel segments with a diameter of 11 m are connected to construct a tunnel length of > 5,000 km. Model basin tests are performed on scale 1:110, where a scale model of 140 m length is tested. The tunnel is designed as a neutral buoyant tunnel to reduce complexity and costs for the mooring system. The motions, deformations and mooring line tensions for the tunnel segments are measured by force transducers, accelerometers and an optical measurement system. Due to flexibility of the slender tunnel segments in combination with a soft mooring system, the tunnel tends to following the incoming waves for certain tunnel depths and wave directions. Only small motions and deformations are allowed for a hyperloop capsule to travel on high speed. The conceptual tests show first results on tunnel depth, structural and geometrical design of an hyperloop tunnel and mooring system.

Effects of piloting supersonic aircraft on plasma corticosteroids and bicarbonate

1959 ◽  
Vol 14 (4) ◽  
pp. 629-631 ◽  
Author(s):  
Henry B. Hale ◽  
James P. Ellis ◽  
Clyde H. Kratochvil
Keyword(s):  
High Speed ◽  
Military Aircraft ◽  
Supersonic Aircraft ◽  
Plasma Bicarbonate ◽  
Student Pilots ◽  
Aircraft Pilots

While flying high-speed military aircraft, pilots frequently hyperventilate to a degree sufficient to induce marked alkalosis. Psychogenic factors are thought to be responsible for the hyperventilation. Comparison was made of pre- and postflight plasma bicarbonate (determined titrimetrically) and corticosteroid levels (Sweat's technique) for 20 instructor pilots and 47 student pilots flying F-100 aircraft for 50 minutes. No differentiation of students and instructors was possible on the basis of either pre- or postflight values; therefore, the data for the two groups were combined. The plasma bicarbonate value following the flight was 1.1 ± .24 mEq/l. (mean ± S.E.) lower than before the flight. Free 17-hydroxycorticosterone was increased 5.8 ± .70 μg/100 ml, while conjugated 17-hydroxycorticosterone increased 5.7 ± .75. The free corticosterone-like fraction increased 3.1 ± .34 μg/100 ml, while the conjugated corticosterone-like fraction increased 3.2 ± .35. Each of these changes was significantly different from zero (P < .001). No statistically significant correlation was found between the fall in bicarbonate and any of the increases in steroid fractions.

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