Download or read book An Experimental Investigation of the Effect of Forward and Rearward Motion on the Thrust of a Shrouded Propeller written by Joe F Thompson (Jr) and published by . This book was released on 1966 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experimental evidence of the existence of a stagnation line between the leading and trailing edges on the outer surface of the shroud of a shrouded propeller in the static condition, in rearward motion, and in forward motion is presented. This stagnation line on the outer surface, which is a result of viscous interaction between the propeller slipstream and the external flow, causes a reduction in shroud circulation below that calculated by distributed singularities methods which assume a stagnation line at the trailing edge only. Shroud thrust decreases as the distance between this stagnation line and the trailing edge increases. It is shown that in rearward motion, such as is the case for a VTOL aircraft landing, the stagnation line moves forward from the vicinity of the trailing edge to the vicinity of the leading edge as vehicle speed increases. This forward movement of the stagnation line results in a significant loss in thrust, which can be correlated with the stagnation line location. Shroud pressure distribution, stagnation line location, and shroud thrust are presented for all three cases of motion at several propeller pitch angles, propeller rotational speeds, and vehicle linear speeds. It is shown that the flow pattern about the shroud is rather complicated in rearward motion, involving two coaxial ring-vortices surrounding the shroud. (Author).
Download or read book An Experimental Investigation of the Effect of Forward and Rearward Motion on the Thrust of a Shrouded Propeller written by Joe F. Thompson and published by . This book was released on 1966 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1978 with total page 1008 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 912 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental Investigation of the Effects of Some Shroud Design Variables on the Static Thrust Characteristics of a Small scale Shrouded Propeller Submerged in a Wing written by Robert T. Taylor and published by . This book was released on 1958 with total page 710 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental investigation has been made to determine the effects of shroud-lip radius of curvature, shroud length, and shroud diffuser angle on the static thrust characteristics of a small-scale shrouded propeller which simulated a propeller submerged in the wing of an airplane. Also included are the effects of distance from the exit of the shroud to the ground on the thrust available take-off.
Download or read book Ducted Fan Design Volume 1 Propulsion Physics and Design of Fans and Long Chord Ducts written by Marc de Piolenc and published by Lulu.com. This book was released on 2018-09-26 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents a simplified method of designing ducted fans for light aircraft propulsion. Includes a survey of ducted-fan-powered aircraft, ranging from amateur-built airplanes to military models and prototypes. Detailed discussion of engines and list of suitable powerplants drawn from automobiles, ATVs and personal watercraft. Extensive technical bibliography and list of sources.
Download or read book Government wide Index to Federal Research Development Reports written by and published by . This book was released on 1967-04 with total page 1078 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Experimental Investigation of a Circulation Controlled Shrouded Propeller written by Jeffrey Clayton Ashworth and published by . This book was released on 1973 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt: A preliminary experimental investigation was made on a 14.18 inch inside diameter, ten inch long, symmetrical airfoil shaped shroud equipped with blowing slots on a blunt semicircular trailing edge. The purpose of the investigation was to determine the effect of circulation control on the thrust of the shroud-propeller combination. Static tests were performed at three propeller blade pitch angles, three propeller speeds and three levels of inside slot blowing rates. Data recorded consisted of the propeller thrust and torque, shroud static pressures, total pressure in front of the inside struts, and total pressure at the blowing slot. Static pressure data was reduced to coefficient form and integrated to obtain thrust and normal force coefficients. This was converted to pounds and compared with the propeller thrust.
Download or read book Hovering Craft Hydrofoil written by and published by . This book was released on 1972 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental Investigation of the Effects of Some Shroud Design Variables on the Statis Thrust Characteristics of a Small scale Shrouded Propeller Submerged in a Wing written by and published by . This book was released on 1958 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book USAF Stability and Control Datcom written by Douglas Aircraft Company and published by . This book was released on 1975 with total page 690 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Government Research Development Reports written by and published by . This book was released on 1967 with total page 1198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aerodynamic Problems Associated with V STOL Aircraft Propulsion and interference aerodynamics written by and published by . This book was released on 1966 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental Investigation of Flutter of a Propeller with Clark Y Section Operating at Zero Forward Velocity at Positive and Negative Blade angle Settings written by John E. Baker and published by . This book was released on 1949 with total page 686 pages. Available in PDF, EPUB and Kindle. Book excerpt: The highest flutter speeds were found in the vicinity of the angle of zero aerodynamic moment and the flutter speed increased considerably in this region with decreasing pressure. Over the rest of the pitch range, the flutter speeds were much lower and varied little with pressure.
Download or read book Theoretical Investigation of Ducted Propeller Aerodynamics written by Theodore Theodorsen and published by . This book was released on 1960 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bibliography of Scientific and Industrial Reports written by and published by . This book was released on 1967-04 with total page 1208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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:
