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Electric Lift Augmentation of Scientific Balloons Using Gossamer Blades.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	Electric Lift Augmentation of Scientific Balloons Using Gossamer Blades./
Author:	Kenny, Nicholas I.
Description:	1 online resource (157 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 85-06, Section: B.
Contained By:	Dissertations Abstracts International85-06B.
Subject:	Aerospace engineering. -
Online resource:	click for full text (PQDT)
ISBN:	9798381162820

Electric Lift Augmentation of Scientific Balloons Using Gossamer Blades.
Kenny, Nicholas I.

Electric Lift Augmentation of Scientific Balloons Using Gossamer Blades. - 1 online resource (157 pages)

Source: Dissertations Abstracts International, Volume: 85-06, Section: B.

Thesis (Ph.D.)--University of Colorado at Boulder, 2023.

Includes bibliographical references

Balloons have been used for studying the atmosphere for centuries, offering the unique benefit of enabling low cost observations in regions of the atmosphere that are otherwise difficult to access. Nonetheless, long-duration ballooning can still be prohibitively expensive, particularly for campaigns aiming to conduct routine flights across the globe. The application of gossamer propeller blades, made of string and fabric-like material and tensioned through centripetal forces, opens the door for inexpensive, long duration, targeted observations with hand-launched weather balloons, but also remains scalable to balloons of other sizes.After achieving static stability of a gossamer blade in atmospheric conditions through a unique rigging method called the 4-bar link, manipulation of the blade geometry via string length adjustments can induce billow in the blades, producing lift by increasing their angle of attack and camber. This augments the lift of the balloon system aerodynamically rather than via changes in buoyancy. Scaled testing has been conducted verifying the stability of the 4-bar link and collecting preliminary lift and drag data from the gossamer blade using optical methods without direct force measurement.Results from the scaled experiments have been applied to models exploring the design of a full scale lift augmentation system and the impacts such a system could have on various types of balloon missions. The 4-bar link enables stability in a gossamer structure without any traditional stiffening methods and establishes a baseline for future work on gossamer propellers and flexible wing structures.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2024

Mode of access: World Wide Web

ISBN: 9798381162820Subjects--Topical Terms:

686400
Aerospace engineering.
Subjects--Index Terms:

Balloon controlIndex Terms--Genre/Form:

554714
Electronic books.

Electric Lift Augmentation of Scientific Balloons Using Gossamer Blades.
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502 $a Thesis (Ph.D.)--University of Colorado at Boulder, 2023.
504 $a Includes bibliographical references
520 $a Balloons have been used for studying the atmosphere for centuries, offering the unique benefit of enabling low cost observations in regions of the atmosphere that are otherwise difficult to access. Nonetheless, long-duration ballooning can still be prohibitively expensive, particularly for campaigns aiming to conduct routine flights across the globe. The application of gossamer propeller blades, made of string and fabric-like material and tensioned through centripetal forces, opens the door for inexpensive, long duration, targeted observations with hand-launched weather balloons, but also remains scalable to balloons of other sizes.After achieving static stability of a gossamer blade in atmospheric conditions through a unique rigging method called the 4-bar link, manipulation of the blade geometry via string length adjustments can induce billow in the blades, producing lift by increasing their angle of attack and camber. This augments the lift of the balloon system aerodynamically rather than via changes in buoyancy. Scaled testing has been conducted verifying the stability of the 4-bar link and collecting preliminary lift and drag data from the gossamer blade using optical methods without direct force measurement.Results from the scaled experiments have been applied to models exploring the design of a full scale lift augmentation system and the impacts such a system could have on various types of balloon missions. The 4-bar link enables stability in a gossamer structure without any traditional stiffening methods and establishes a baseline for future work on gossamer propellers and flexible wing structures.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2024
538 $a Mode of access: World Wide Web
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650 4 $a Atmospheric sciences. $3 1179392
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653 $a Propellers
653 $a Static stability
653 $a Atmospheric conditions
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