Exploratory Investigation of Aerodynamic Characteristics of Helicopter Tail Boom Cross-Section Models with Passive Venting

Exploratory Investigation of Aerodynamic Characteristics of Helicopter Tail Boom Cross-Section Models with Passive Venting Author : Daniel W. Banks
Release : 2000
Publisher :
File Size : 41.10 MB
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Two large-scale, two-dimensional helicopter tail boom models were used to determine the effects of passive venting on boom down loads and side forces in hovering crosswind conditions. The models were oval shaped and trapeziodal shaped. Completely porous and solid configurations, partial venting in various symmetric and asymmetric configurations, and strakes were tested. Calculations were made to evaluate the trends of venting and strakes on power required when applied to a UH-60 class helicopter. Compared with the UH-60 baseline, passive venting reduced side force but increased down load at flow conditions representing right sideward flight. Selective asymmetric venting resulted in side force benefits close to the fully porous case. Calculated trends on the effects of venting on power required indicated that the high asymmetric oval configuration was the most effective venting configuration for side force retention, and the high asymmetric with a single strake was the most effective for overall power reduction. Also, curves of side force versus flow angle were noticeably smoother for the vented configurations compared with the solid baseline configuration; this indicated a potential for smoother flight in low-speed crosswind conditions.

When Baby Boom Women Retire

When Baby Boom Women Retire Author : Nancy Dailey
Release : 2000
Publisher : Greenwood Publishing Group
ISBN : 9780275970970
File Size : 89.70 MB
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Fewer than 20% of Baby Boom women will experience a secure retirement. Marriage, education, occupation, home ownership--these variables predict their future. Possession of all four indicates retirement security, and absence of any increases risk of old-age poverty. This riveting sociological study also examines the social relations and structures that will determine the retirement experience, options, and decisions for more than 40 million Baby Boom women. These women's material base and social status are examined through the use of empirical data, and the key predictors of their retirement are identified. The massive entry of Baby Boom women into the labor force increases the importance of retirement planning for working women. It comes at a time when existing research models and data are outdated and inadequate to effectively predict their future retirement experience. Over the past 30 years, American men and their spouses have benefited from the linear, undifferentiated model of the traditional male retirement. For the Baby Boom generation, however, the nature of work has changed significantly. The current retirement model may not serve Baby Boom men as well as in the past, let alone Baby Boom women. In contrast, this book offers a new, dynamic model that considers the social and work structures influencing women's lives and that accurately reflects the predictors and parameters of Baby Boom women's retirement.

Coffee Boom, Government Expenditure, and Agricultural Prices

Coffee Boom, Government Expenditure, and Agricultural Prices Author : Jorge García García
Release : 1988
Publisher : Intl Food Policy Res Inst
ISBN : 9780896290693
File Size : 68.33 MB
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The role of agriculture in the Colombian economy and main economic development, 1967-83; Model and empirical evidence; Supply response in Colombian agriculture; Income distribution and real wages in agriculture.

The Clinton Economic Boom

The Clinton Economic Boom Author :
Release :
Publisher : Xulon Press
ISBN : 1612159494
File Size : 39.17 MB
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Boom, Boom, Ain't It Great to Be Crazy

Boom, Boom, Ain't It Great to Be Crazy Author :
Release : 2016
Publisher : Capstone
ISBN : 1632903776
File Size : 54.47 MB
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Find out why it's so much fun to act silly. A story of three blind mice, a clumsy horse, and a polar bear dancing in pink pants.

Boom & Bust

Boom & Bust Author : Danielle Dorice Van Jaarsveld
Release : 2005
Publisher : Ann Arbor, Mich. : University Microfilms International
File Size : 32.41 MB
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Crash, Bang, Boom

Crash, Bang, Boom Author : Karen A. Gibson
Release : 2002
Publisher : Upstart Books
File Size : 43.86 MB
Format : PDF, Mobi
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Explores 11 reading skills and literary devices through 55 popular children's books.

Upper Tittabawasee River Boom Towns

Upper Tittabawasee River Boom Towns Author : Stan Berriman
Release : 1970
Publisher :
File Size : 65.89 MB
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"This is a story that has long needed telling. It is the story of not one town, but four towns that made up an area, and as a result of their being, made possible the growth of a neighboring city. This is the story of the towns of Averill, Edenville, Hope and Sanford, together with a short history of the early Indians of the area and the logging and salt wells that made possible the growth of the city of Midland, Michigan."--Introduction (p. i).

Boom, You're Well

Boom, You're Well Author : Douglas Hunt
Release : 1996-11
Publisher : Pro Perkins Pub
ISBN : 9781887314282
File Size : 75.35 MB
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Boom, Bust, and Beyond

Boom, Bust, and Beyond Author : David Carroll
Release : 2003
Publisher :
File Size : 45.84 MB
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Boom! Author : Mark Haddon
Release : 2009-10-06
Publisher : Random House
ISBN : 1407050389
File Size : 38.46 MB
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Boom! Is a roller-coaster read with spaceships, spies and mortal danger! Jim and his best friend Charlie weren't looking for adventure, when they decided to bug the staffroom . . . But then they overhear their teachers speaking in a secret language and it's too late to turn back. And now they have to explain to the police, the headmistress and their parents where they've been for a whole week - without mentioning the aliens.


Boom Author : Mary Brown
Release : 2006
Publisher : Amacom Books
ISBN : 9780814473900
File Size : 50.52 MB
Format : PDF, ePub, Docs
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With Baby Boomer women spending over a trillion dollars a year, the days of 40+ women being ignored by marketers are numbered BOOM is a comprehensive guide to identifying, reaching and influencing these women. The book features insights and case histories from 40 top marketers, including executives from Intel, Ford, Seabourn Cruises, Citigroup, Wellpoint, Mary Kay, and more. Key features This is the only book on marketing to this specific demographic. Baby Boomers are the largest generational demographic today, and women not only outnumber men, but also influence as much as 80% of household purchase decisions Includes: The Eight Things You May Not Know About Boomer Women But Should, the Imago Diagnostic (ID), an assessment tool to help marketers identify what makes Baby Boomer women tick and more