Results 101 to 110 of about 1,052,955 (228)

Acoustic and aerodynamic testing of a scale model variable pitch fan [PDF]

open access: yes
A fully reversible pitch scale model fan with variable pitch rotor blades was tested to determine its aerodynamic and acoustic characteristics. The single-stage fan has a design tip speed of 1160 ft/sec (353.568 m/sec) at a bypass pressure ratio of 1.5 ...
Jutras, R. R., Kazin, S. B.
core   +1 more source

Effects of dynamic aeroelasticity on handling qualities and pilot rating [PDF]

open access: yes
Pilot performance parameters, such as pilot ratings, tracking errors, and pilot comments were determined for a longitudinal pitch tracking task using a large, flexible bomber with parametric variations in the undamped natural frequencies of the two ...
Swaim, R. L., Yen, W. Y.
core   +1 more source

PRODUCTION OF CARBON FIBERS FROM CASTILLA'S CRUDE-OIL DEASPHALTED BOTTOMS

open access: yesCT&F Ciencia, Tecnología & Futuro, 2002
Obtaining raw materials for the manufacturing of carbon fibers from Castilla's crude-oil deasphalted bottoms was achieved through thermal treatments carried out in inert atmosphere, at temperatures ranging from 573 K to 673 K.
Gonzalo Leal, Jhon-Iván Peñaloza
doaj  

Static investigation of two STOL nozzle concepts with pitch thrust-vectoring capability [PDF]

open access: yes
A static investigation of the internal performance of two short take-off and landing (STOL) nozzle concepts with pitch thrust-vectoring capability has been conducted.
Burley, J. R., II, Mason, M. L.
core   +1 more source

USAGE OF COMPUTERISED MEANS IN VOCAL ASSESSMENT

open access: yesStudia Universitatis Babeş-Bolyai. Musica, 2012
This study investigates implementation of new technologies in vocal assessment pertaining to university degree artistic education. One of our objectives represents the collection of information regarding changes occurring in singing voice as a result of
Ana RUSU
doaj  

Dynamics of high-bypass-engine thrust reversal using a variable-pitch fan [PDF]

open access: yes
The test program demonstrated that successful and rapid forward-to reverse-thrust transients can be performed without any significant engine operational limitations for fan blade pitch changes through either feather pitch or flat pitch.
Sagerser, D. R.   +2 more
core   +1 more source

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