Download or read book The Effect of Trailing edge Extension Flaps on Propeller Characteristics written by John L. Crigler and published by . This book was released on 1945 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summary: An analysis was made to determine the effect on propeller performance of extension flaps added to the trailing edge of a propeller blade. A method of calculating the changes in the ideal angle of attack, the angle of zero lift, and the design lift coefficient of a propeller blade section having a trailing-edge extension flap was utilized to calculate the performance of a six-blade dual-rotating propeller with extension flaps varying up to 40 percent chord. The method was used to determine the angle that the flap extension must make with the chord in order to obtain a particular load distribution. Although the analysis in this report was made for a wind-tunnel propeller designed to operate at low advance-diameter ration, the method is directly applicable to any propeller section under any operating condition.
Download or read book Tests of Four scale Propellers to Determine the Effect of Trailing edge Extension on Propeller Aerodynamic Characteristics written by Julian D. Maynard and published by . This book was released on 1945 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of a Trailing edge Extension on the Characteristics of a Propeller Section written by Theodore Theodorsen and published by . This book was released on 1944 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: A method is presented to evaluate changes in airfoil characteristics resulting from extension of chord at trailing edge of propeller blade section. Method determines changes in angle of zero lift, angle of attack, and difference in these angles (upon which design lift coefficient depends) as function of angle and length of trailing edge extension. Treatment is based on thin-airfoil theory and is concerned only with mean camber line of section. Examples and detailed computations illustrate application of method, which is applicable to all propeller sections. Characteristics obtained were in perfect agreement with data calculated by exact method of arbitrary airfoil theory.
Download or read book The Static Thrust Characteristics of a Propeller with Trailing edge Flaps written by Donnell Wayne Dutton and published by . This book was released on 1940 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wartime Report written by and published by . This book was released on 1944 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reproductions of reports, some declassified, of research done at Langley Memorial Aeronautical Laboratory during World War II. The order of reports does not represent when they were chronologically issued. Reference to the original version of each report is included.
Download or read book Wartime Report written by United States. National Advisory Committee for Aeronautics and published by . This book was released on with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NACA Wartime Reports Series L written by Julian D. Maynard and published by . This book was released on 1945 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Propellers with trailing-edge extensions were studied to determine aerodynamic characteristics. Trailing-edge extension increased power absorbed by propeller with little loss in efficiency. Power coefficient for maximum efficiency was greater for 20 percent camber type extension than for 20 percent straight type extension over range of advance ratio of 1.0 to 2.5 although camber type was less efficient. Efficiency was about the same for cruising and high-speed at a high power coefficient for propeller with extension.
Download or read book Wartime Report written by and published by . This book was released on 1944 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NACA Wartime Report written by United States. National Advisory Committee for Aeronautics and published by . This book was released on with total page 712 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wind tunnel Investigation of Effects of a Pusher Propeller on Lift Profile Drag Pressure Distribution and Boundary layer Transition of a Flapped Wing written by Carl A. Sandahl and published by . This book was released on 1945 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summary: Some of the effects of pusher-propeller operation on the aerodynamic characteristics of a flapped wing were measured in the Langley propeller-research tunnel. The effects of propeller operation on the lift and profile drag of the wing, on pressure distribution, and on the position of boundary-layer transition were obtained. The results indicated that, at fixed angles of attack and with flaps deflected, the wing lift increased appreciably with increasing thrust coefficient. With flaps retracted, no appreciable increase in lift with increases in thrust coefficient was measured. Chordwise pressure distributions at several spanwise stations indicated that the effect of propeller operation was greatest in the region immediately ahead of the propeller and that the effect extended out-board from the propeller axis for about 2.5 propeller radii. Measurements of boundary-layer velocity on the forward part of the upper surface of the wing showed no appreciable shift of transition in the range of thrust coefficients investigated.
Download or read book Index of NACA Technical Publications written by United States. National Advisory Committee for Aeronautics and published by . This book was released on 1959 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Data Digest written by and published by . This book was released on 1948 with total page 902 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Large scale Wind tunnel Tests of an Airplane Model with Two Propellers and Rotaing Cylinder Flaps written by James A. Weiberg and published by . This book was released on 1968 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Study of NACA and NASA Published Information of Pertinence in the Design of Light Aircraft written by Clifford J. Moore and published by . This book was released on 1970 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report investigates critical reviews of NACA and NASA report literature on light aircraft design, with emphasis on propulsion subsystems, stability, control, propellers, performance, and safety.
Download or read book A Selected Listing of NASA Scientific and Technical Reports for written by and published by . This book was released on 1949 with total page 664 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Confidential Documents written by United States. Army Air Forces and published by . This book was released on 1948 with total page 1094 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Annual Report National Advisory Committee for Aeronautics written by United States. National Advisory Committee for Aeronautics and published by . This book was released on 1957 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes the Committee's Technical reports no. 1-1058, reprinted in v. 1-37.
