Large-scale Wind-tunnel Tests of a Deflected Slipstream STOL Model with Wings of Various Aspect Ratios PDF Download
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Author: V. Robert Page
Publisher:
ISBN:
Category : Propeller-driven aircraft
Languages : en
Pages : 58
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Book Description
Author: V. Robert Page
Publisher:
ISBN:
Category : Propeller-driven aircraft
Languages : en
Pages : 58
Get Book Here
Book Description
Author: V. Robert Page
Publisher:
ISBN:
Category :
Languages : en
Pages : 53
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Book Description
Author: Robert V. Page
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: V. Robert Page
Publisher:
ISBN:
Category :
Languages : en
Pages : 52
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Book Description
Author: Michael D. Falarski
Publisher:
ISBN:
Category : Short take-off and landing aircraft
Languages : en
Pages : 60
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Book Description
The longitudinal aerodynamic characteristics of a semispan wing dellected-slipstream configuration with a double-slotted flap and and auxiliary wing were determined. The model was powered by two low-pressure-ratio ducted fans. A comparison of static test results with results obtained from various propeller-driven configurations indicates that the turning effectiveness of fan-powered deflected-slipstream configurations can be correlated with propeller-powered configurations with the same flap-chord to slipstream-diameter ratio. The turning effectiveness of the auxiliary wing was essentially the same as would be produced by a conventional slotted flap system with the same flap-chord to slipstream-diameter ratio. The auxiliary wing reduced the thrust required at low speeds as would be expected due to the increase in lifting surface area.
Author: V. Robert Page
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 76
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Book Description
Wind tunnel tests of stability and control characteristics of large scale model representative of propeller-driven STOL transport aircraft.
Author: James A. Weiberg
Publisher:
ISBN:
Category : Buffeting (Aerodynamics)
Languages : en
Pages : 54
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Book Description
Author: Terrell W. Feistel
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 64
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Book Description
A unique inverting flap system has been investigated on a large-scale deflected slipstream model in the Ames 40- by 80-Foot Wind Tunnel. The subject tests utilized 33% chord double-slotted flaps on a low-aspect ratio wing that was fully immersed in the propeller slipstream. Evaluation of the flap effectiveness is aided by comparisons with the results of tests of other flap systems on the same twin propeller, twin tail boom STOL utility aircraft mode. No extreme or abrupt force or moment increments were encountered when the flaps were deflected through a wide range, corresponding to the complete retraction/extension spectrum. The lift and descent capability of the inverting flaps compared very favorably with that of the other flap systems that have been tested on this model, including some with much greater mechanical complexity. As expected, the flaps caused large nose-down pitching-moment increments at the high lift settings; however, the trimmed characteristics are still competitive with those obtained from the more complicated flap systems. It is believed that these flaps may have promising potential application to the design of relatively simple STOL utility aircraft with improved performance capabilities. In addition, they may merit consideration as retrofits to existing aircraft with less effective flap systems. (Author).
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 204
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Book Description
Author: NATIONAL AERONAUTICS AND SPACE ADMINISTRATION WASHINGTON D C.
Publisher:
ISBN:
Category :
Languages : en
Pages : 1
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Book Description
Tests were made of a large-scale tilt-wing deflected-slipstream VTOL airplane with blowingtype BLC trailing-edge flaps. The model was tested with flap deflections of 0 degrees without BLC, 50 degrees with and without BLC, and 80 degrees with BLC for wing-tilt angles of 0, 30, and 50 degrees. Included are results of tests of the model equipped with a leading-edge flap and the results of tests of the model in the presence of a ground plane. (Author).
