Author: Edward V. Ashburn
Publisher:
ISBN:
Category : Atmospheric physics
Languages : en
Pages : 84
Book Description
The report consists of analysis of measurements made in HICAT flight program and described in reports issued in 1967 and 1968. Clear air turbulent regions in the altitude range 45,000 to 65,000 ft. varied in length from 1 to 115 nm. Power spectral density curves computed from data from the longer turbulent regions had slopes and scale lengths that varied over a relatively wide range. Composite spectra for altitude and topographic categories for the long turbulent regions had slopes of -1.25 to -1.55 for the vertical component, -1.50 to -1.70 for the lateral component, and -1.45 to -1.60 for the longitudinal component. The scale lengths were all above 8,000 ft. The standard deviations of the root-mean-square gust velocities increase significantly with increase in roughness of underlying terrain. The range in values is 0.9 to 3.4 ft/sec. for the vertical component, 1.5 to 4.6 ft/sec for the lateral component and 1.2 to 4.6 ft/sec. for the longitudinal component. There was relatively little change with altitude. The minimum root-mean-square velocity to be considered turbulence varied 0.95 to 3.02 ft/sec. if truncated spectra were used to establish basic definitions of turbulence.
High Altitude Gust Criteria for Aircraft Design
Author: Edward V. Ashburn
Publisher:
ISBN:
Category : Atmospheric physics
Languages : en
Pages : 84
Book Description
The report consists of analysis of measurements made in HICAT flight program and described in reports issued in 1967 and 1968. Clear air turbulent regions in the altitude range 45,000 to 65,000 ft. varied in length from 1 to 115 nm. Power spectral density curves computed from data from the longer turbulent regions had slopes and scale lengths that varied over a relatively wide range. Composite spectra for altitude and topographic categories for the long turbulent regions had slopes of -1.25 to -1.55 for the vertical component, -1.50 to -1.70 for the lateral component, and -1.45 to -1.60 for the longitudinal component. The scale lengths were all above 8,000 ft. The standard deviations of the root-mean-square gust velocities increase significantly with increase in roughness of underlying terrain. The range in values is 0.9 to 3.4 ft/sec. for the vertical component, 1.5 to 4.6 ft/sec for the lateral component and 1.2 to 4.6 ft/sec. for the longitudinal component. There was relatively little change with altitude. The minimum root-mean-square velocity to be considered turbulence varied 0.95 to 3.02 ft/sec. if truncated spectra were used to establish basic definitions of turbulence.
Publisher:
ISBN:
Category : Atmospheric physics
Languages : en
Pages : 84
Book Description
The report consists of analysis of measurements made in HICAT flight program and described in reports issued in 1967 and 1968. Clear air turbulent regions in the altitude range 45,000 to 65,000 ft. varied in length from 1 to 115 nm. Power spectral density curves computed from data from the longer turbulent regions had slopes and scale lengths that varied over a relatively wide range. Composite spectra for altitude and topographic categories for the long turbulent regions had slopes of -1.25 to -1.55 for the vertical component, -1.50 to -1.70 for the lateral component, and -1.45 to -1.60 for the longitudinal component. The scale lengths were all above 8,000 ft. The standard deviations of the root-mean-square gust velocities increase significantly with increase in roughness of underlying terrain. The range in values is 0.9 to 3.4 ft/sec. for the vertical component, 1.5 to 4.6 ft/sec for the lateral component and 1.2 to 4.6 ft/sec. for the longitudinal component. There was relatively little change with altitude. The minimum root-mean-square velocity to be considered turbulence varied 0.95 to 3.02 ft/sec. if truncated spectra were used to establish basic definitions of turbulence.
Climatic and Environmental Criteria for Aircraft Design
Author: United States. Munitions Board. Aircraft Committee. Subcommittee on Air Force-Navy-Civil Aircraft Design Criteria
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 76
Book Description
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 76
Book Description
Gust Loads on Aircraft
Author: Frederic M. Hoblit
Publisher: AIAA
ISBN: 9781600860607
Category : Airplanes
Languages : en
Pages : 332
Book Description
Publisher: AIAA
ISBN: 9781600860607
Category : Airplanes
Languages : en
Pages : 332
Book Description
Airplane Design VII
Author: Jan Roskam
Publisher: DARcorporation
ISBN: 9781884885549
Category : Aerospace engineering
Languages : en
Pages : 372
Book Description
Publisher: DARcorporation
ISBN: 9781884885549
Category : Aerospace engineering
Languages : en
Pages : 372
Book Description
Climatic and Environmental Criteria for Aircraft Design
Author: United States. Munitions Board. Aircraft Committee
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 72
Book Description
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 72
Book Description
Survey on Effect of Surface Winds on Aircraft Design and Operation and Recommendations for Needed Wind Research
Author: John C. Houbolt
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 84
Book Description
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 84
Book Description
Gust Criteria for Airplane Design
Author: Edward A. Rossman
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 25
Book Description
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 25
Book Description
Development of a Power-spectral Gust Design Procedure for Civil Aircraft
Author: Frederic M. Hoblit
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Scientific and Technical Aerospace Reports
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 300
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 300
Book Description
Aircraft Design
Author: Daniel P. Raymer
Publisher: AIAA (American Institute of Aeronautics & Astronautics)
ISBN: 9781563478291
Category : Airplanes
Languages : en
Pages : 0
Book Description
Winner of the Summerfield Book Award Winner of the Aviation-Space Writers Association Award of Excellence. --Over 30,000 copies sold, consistently the top-selling AIAA textbook title This highly regarded textbook presents the entire process of aircraft conceptual designfrom requirements definition to initial sizing, configuration layout, analysis, sizing, and trade studiesin the same manner seen in industry aircraft design groups. Interesting and easy to read, the book has more than 800 pages of design methods, illustrations, tips, explanations, and equations, and extensive appendices with key data essential to design. It is the required design text at numerous universities around the world, and is a favorite of practicing design engineers.
Publisher: AIAA (American Institute of Aeronautics & Astronautics)
ISBN: 9781563478291
Category : Airplanes
Languages : en
Pages : 0
Book Description
Winner of the Summerfield Book Award Winner of the Aviation-Space Writers Association Award of Excellence. --Over 30,000 copies sold, consistently the top-selling AIAA textbook title This highly regarded textbook presents the entire process of aircraft conceptual designfrom requirements definition to initial sizing, configuration layout, analysis, sizing, and trade studiesin the same manner seen in industry aircraft design groups. Interesting and easy to read, the book has more than 800 pages of design methods, illustrations, tips, explanations, and equations, and extensive appendices with key data essential to design. It is the required design text at numerous universities around the world, and is a favorite of practicing design engineers.