Download or read book Propeller Noise Measurements in DNW on the Fuselage of a Twin Engine Aircraft Model written by T. Zandbergen and published by . This book was released on 1985 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Theoretical Investigation of Noise Reduction Through the Cylindrical Fuselage of a Twin engine Propeller driven Aircraft written by Rama B. Bhat and published by . This book was released on 1978 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Theoretical Investigation of Noise Reduction Through The cylindrical Fuselage of a Twin engine Propeller driven Aircraft written by Rama B. Bhat and published by . This book was released on 1978 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of Fuselage Acoustic Treatment for a Twin engine Turboprop Aircraft in Flight and Laboratory Tests written by and published by . This book was released on 1984 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book In flight Measurement of Propeller Noise on the Fuselage of an Airplane written by and published by . This book was released on 1989 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book In Flight Measurement of Propeller Noise on the Fuselage of an Airplane written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-08 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: In-flight measurements of propeller noise on the fuselage of an OV-10A aircraft were obtained using a horizontal and a vertical microphone array. A wide range of flight conditions were tested including changes in angle of attack, sideslip angle, power coefficient, helical tip Mach number and advance ratio, and propeller direction of rotation. Results show a dependence of the level and directivity of the tones on the angle of attack and on the sideslip angle with the propeller direction of rotation, which is similar to results obtained in wind tunnel tests with advanced propeller designs. The level of the tones at each microphone increases with increasing angle of attack for inboard-down propeller rotation and decreases for inboard-up rotation. The level also increases with increasing slideslip angle for both propeller directions of rotation. Increasing the power coefficient results in a slight increase in the level of the tones. A strong shock wave is generated by the propeller blades even at relatively low helical tip Mach numbers resulting in high harmonic levels. As the helical tip Mach number and the advance ratio are increased, the level of the higher harmonics increases much faster than the level of the blade passage frequency. Pla, Frederic G. and Ranaudo, Richard and Woodward, Richard P. Glenn Research Center...
Download or read book A Theoretical Investigation of Noise Reduction Through the Cylindrical Fuselage of a Twin engine Propeller drivven Aircraft written by Rama B. Bhat and published by . This book was released on 1978 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book AIAA 11th Aeroacoustics Conference written by and published by . This book was released on 1987 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aerodynamics and Acoustics of Propellers written by North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development and published by . This book was released on 1985 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aeronautical Engineering written by and published by . This book was released on 1991 with total page 1036 pages. Available in PDF, EPUB and Kindle. Book excerpt: A selection of annotated references to unclassified reports and journal articles that were introduced into the NASA scientific and technical information system and announced in Scientific and technical aerospace reports (STAR) and International aerospace abstracts (IAA).
Download or read book Analytical Modeling of the Structureborne Noise Path on a Small Twin engine Aircraft written by and published by . This book was released on 1988 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Structureborne Noise Measurements on a Small Twin Engine Aircraft written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-16 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: Structureborne noise measurements performed on a twin-engine aircraft (Beechcraft Baron) are reported. There are two overall objectives of the test program. The first is to obtain data to support the development of analytical models of the wing and fuselage, while the second is to evaluate effects of structural parameters on cabin noise. Measurements performed include structural and acoustic responses to impact excitation, structural and acoustic loss factors, and modal parameters of the wing. Path alterations include added mass to simulate fuel, variations in torque of bolts joining wing and fuselage, and increased acoustic absorption. Conclusions drawn regarding these measurements are presented. Cole, J. E., III and Martini, K. F. Unspecified Center...
Download or read book Structureborne Noise Measurements on a Small Twin Engine Aircraft written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-11-06 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: Structureborne noise measurements performed on a twin-engine aircraft (Beechcraft Baron) are reported. There are two overall objectives of the test program. The first is to obtain data to support the development of analytical models of the wing and fuselage, while the second is to evaluate effects of structural parameters on cabin noise. Measurements performed include structural and acoustic responses to impact excitation, structural and acoustic loss factors, and modal parameters of the wing. Path alterations include added mass to simulate fuel, variations in torque of bolts joining wing and fuselage, and increased acoustic absorption. Conclusions drawn regarding these measurements are presented. Cole, J. E., III and Martini, K. F. Unspecified Center...
Download or read book Interior Noise Levels of Two Propeller driven Light Aircraft written by J. J. Catherines and published by . This book was released on 1975 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA SP written by and published by . This book was released on 1992 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 974 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aerodynamics and Acoustics of Propellers written by and published by . This book was released on 1985 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt:
