The N.A.C.A. Photographic Apparatus for Studying Fuel Sprays from Oil Engine Injection Valves and Test Results from Several Researches
Author: A. J. Fairbanks
Publisher:
Published: 1927
Total Pages: 172
ISBN-13:
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Tests in the Variable Density Wind Tunnel to Investigate the Effects of Scale and Turbulence on Airfoil Characteristics
Author: John Stack
Publisher:
Published: 1931
Total Pages: 556
ISBN-13:
DOWNLOAD EBOOKThe effects of scale and turbulence on the lift and drag of five airfoils, the N.A.C.A. 0006 , the N.A.C.A. 0021, the Clark Y, The U.S.A 35-A, and the U.S.N. P.S.6, hve been investigated in the Variable Density Wind Tunnel. Tests were made over a wide scale for only two different conditions of turbulence.
An Investigation of Cotton for Parachute Cloth
Author: William D. Appel
Publisher:
Published: 1931
Total Pages: 532
ISBN-13:
DOWNLOAD EBOOKThis is a resume of the work on a cotton parachute cloth for use as a substitute for silk in the event of an emergency curtailing the supply. Cotton yar of high strength in proportion to its weight and otherwise specially suitable for parachute cloth was developed. Cloth woven from this yarn in the Bureau of Standards mill was equal or superior to parachute silk in strength and tear resistance, met the requirements with respect to air permeability, and weighed only a few tenths of an ounce per square yard more than the silk cloth. Practical trials of cotton parachutes carried out by the Navy Department clearly indicate that the cotton parachute closely approaches the silk parachute in performance as to rate of descent, opening time, strength and ability to function when stored in the pack for sixty days. The increase in weight of the equipment resulting from the use within practical limits. A specification for cotton parachute cloth and the way in which the requirements of the specification have been met are given. Cotton yarns suitable for parachute cloth are now being woven commercially in the United States.
Technical Note - National Advisory Committee for Aeronautics
Author:
Publisher:
Published: 1931
Total Pages: 700
ISBN-13:
DOWNLOAD EBOOKAn Accurate Method of Measuring the Moments of Inertia of Airplanes
Author: M. P. Miller
Publisher:
Published: 1930
Total Pages: 606
ISBN-13:
DOWNLOAD EBOOKThis note contains a description of an improved apparatus and procedure used for determining the moments of inertia of airplanes. The method, based on the pendulum theory, is similar to that previously used, but a recent investigation of its accuracy has resulted in the improvements described herein. The error, when using the new apparatus and procedure, has been found to be of the order of 1 percent. Sample data and calculation for an airplane are included in an appendix.
List of Reports with Prices
Author: United States. National Advisory Committee for Aeronautics
Publisher:
Published: 1945
Total Pages: 80
ISBN-13:
DOWNLOAD EBOOKA Suggested Method for Measuring Turbulence
Author: Charles Fayette Taylor
Publisher:
Published: 1931
Total Pages: 540
ISBN-13:
DOWNLOAD EBOOKThe desirability of a quantitative measure of turbulence is emphasized, and a possible method of attack on the problem is discussed. Data are presented to show that the hot-wire aneomometer has possibilities as an instrument for measuring turbulence. An apparatus consisting essentially of two hot wires, one parallel to the air flow and one at right angles to it, is suggested. Further study of the possibilities of such an apparatus is recommended.
Rate of Heat Transfer from Finned Metal Surfaces
Author: Charles Fayette Taylor
Publisher:
Published: 1930
Total Pages: 654
ISBN-13:
DOWNLOAD EBOOKThe object of this series of investigations is to evaluate the factors which control the rate of heat transfer to a moving current of air from finned metal surfaces similar to those used on aircraft engine cylinders. As a result of this work, it is hoped to establish data which will enable the finning of cooling surfaces to be designed to suit the particular needs of any specific application.
