Download or read book Experimental Studies of Tandem Propeller Performance at Static Conditions written by Roy S. Rice and published by . This book was released on 1968 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book NBS Special Publication written by and published by . This book was released on 1971 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Report written by United States. National Bureau of Standards and published by . This book was released on 1968 with total page 696 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Current Hydraulic Laboratory Research in the United States written by and published by . This book was released on 1970 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hydraulic Research in the United States and Canada written by and published by . This book was released on 1972 with total page 708 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hydraulic Research in the United States 1970 written by United States. National Bureau of Standards and published by . This book was released on 1971 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Configurational Changes on Tandam Propeller Performance written by William G. Wilson and published by . This book was released on 1965 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Experimental Investigation of the Static Performance and Transition Characteristics of a Small scale VTOL Propeller written by Vincent Michael Paglino and published by . This book was released on 1964 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Procedure for the Design of Tandem Propellers written by Stephen B. Denny and published by . This book was released on 1974 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: A procedure is outline in this report for the design of tandem propellers. The specific tandem propeller arrangement discussed with be two propellers operating one behind the other, on the same shaft with the same rotational speed and direction of rotation. The specific design procedure discussed will be for the tandem unit operating in uniform inflow but the logic involved would be directly extendable to the wake adapted design case. A tandem propeller unit designed using this method was constructed and evaluated in open-water experiments. The performance data, presented herein, shows that the unit produced the desired thrust at the design revolution rate and that the open-water efficiency was as good as, or better than, a single propeller carrying the same load at the same operating conditions. The ability to design tandem propeller units which meet prescribed performance criteria and which operate at acceptable propeller efficiencies could have considerable impact on ship powering technology. Tandem propellers can be applied to ships with high delivered horsepower, where vibration and cavitation erosion are anticipated problems, and where the physical constraints make a tandem arrangement attractive. (Author).

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1993 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Experimental Investigation of the Static Thrust Characteristics for Counterrotating Propellers written by Matthew Arlington Batson (Jr.) and published by . This book was released on 1939 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 Experimental Research on Air Propellers written by United States. National Advisory Committee for Aeronautics and published by . This book was released on 1921 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Experimental Study of Three blade Oppositely Rotating Tandem Propellers written by Samuel Robert Brentnall and published by . This book was released on 1939 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Configurational Changes on Tandem Propeller Performance written by William G. Wilson and published by . This book was released on 1965 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Investigation of the Characteristics of a Propeller Under Static Thrust Conditions written by Edward Paul Buckley and published by . This book was released on 1942 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Open Water Performance of Tandem Propellers written by C. T. Davis and published by . This book was released on 1973 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tandem propellers, defined as two propellers coaxially mounted to the same shaft, were characterized in open water. The motivation for this work was to determine if the reduced loading per propeller would improve efficiency. Other potential gains such as reduced vibration and decreased cavitation are to be studied later. The experiments were performed at two angular positions and only one axial spacing for direct comparison to a standard parent propeller. The performance shows that improved efficiency is obtainable with tandem propellers. The results also show that changes in performance occur with different angular positions of the propellers. Additional experiments are recommended. (Author).