Aeroelastic Model Helicopter Rotor Testing in the Langley TDT PDF Download
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Author:
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Category :
Languages : en
Pages : 22
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Author:
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ISBN:
Category :
Languages : en
Pages : 22
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Publisher: DIANE Publishing
ISBN: 1428995803
Category :
Languages : en
Pages : 115
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Author:
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ISBN:
Category :
Languages : en
Pages : 134
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Book Description
Data for rotors using unconventional airfoils are of interest to permit an evaluation of this technology's capability to meet the U.S. Army's need for increased helicopter mission effectiveness and improved safety and survivability. Thus, an experimental investigation was conducted in the Langley Transonic Dynamics Tunnel (TDT) to evaluate the effect of using slotted airfoils in the rotor blade tip region (85 to 100 percent radius) on rotor aerodynamic performance and loads. Four rotor configurations were tested in forward flight at advance ratios from 0.15 to 0.45 and in hover in-ground effect. The hover tip Mach number was 0.627, which is representative of a design point of 4000-ft geometric altitude and a temperature of 95 degrees F. The baseline rotor configuration had a conventional single element airfoil in the tip region. A second rotor configuration had a forward-slotted airfoil with a -6 degrees slat, a third configuration had a forward-slotted airfoil with a -10 degrees slat, and a fourth configuration had an aft-slotted airfoil with a 3 degrees flap (trailing edge down). The results of this investigation indicate that the -6 degrees slat configuration offers some performance and loads benefits over the other three configurations.
Author:
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Category : Aeronautics
Languages : en
Pages : 416
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Author: Jeffrey D. Singleton
Publisher: DIANE Publishing
ISBN: 1428915508
Category : Rotors (Helicopters)
Languages : en
Pages : 86
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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 568
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Author:
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Category :
Languages : en
Pages : 118
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Author:
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Category : Aeronautics
Languages : en
Pages : 284
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Author:
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ISBN:
Category : Aeronautics
Languages : en
Pages : 980
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Book Description
Two-volume collection of case studies on aspects of NACA-NASA research by noted engineers, airmen, historians, museum curators, journalists, and independent scholars. Explores various aspects of how NACA-NASA research took aeronautics from the subsonic to the hypersonic era.-publisher description.
Author: W. Keats Wilkie
Publisher:
ISBN:
Category : Modal analysis
Languages : en
Pages : 24
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