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Comparison of Weights of 17ST and Steel Tubular Structural Members Used in Aircraft Construction
Although the strong aluminum alloys have proved themselves to be very efficient in aircraft construction there is a growing competition from the high-strength steels for certain parts, especially for tubular members. This tendency is being reflected in research work carried on at the Bureau of Standards. This study will be based largely on data given in Technical Note No. 307 of the NACA.
Date:
May 1931
Creator:
Hartmann, E. C.
System:
The UNT Digital Library
Effect of High Air Velocities on the Distribution and Penetration of a Fuel Spray
"By means of the NACA Spray Photography Equipment high speed moving pictures were taken of the formation and development of fuel sprays from an automatic injection valve. The sprays were injected normal to and counter to air at velocities from 0 to 800 feet per second. The air was at atmosphere temperature and pressure. The results show that high air velocities are an effective means of mixing the fuel spray with the air during injection" (p. 1).
Date:
May 1931
Creator:
Rothrock, A. M.
System:
The UNT Digital Library
An integrating manometer for use in wind tunnel pressure distribution measurements
A multiple manometer designed to integrate automatically the normal force over an airfoil section is described and its mathematical theory explained. The development of this instrument was conducted at the Langley Memorial Aeronautical Laboratory.
Date:
May 1931
Creator:
Noyes, Richard W.
System:
The UNT Digital Library
Moments of inertia of several airplanes
This paper, which is the first of a series presenting the results of such measurements, gives the momental ellipsoids of ten army and naval biplanes and one commercial monoplane. The data were obtained by the use of a pendulum method, previously described. The moments of inertia are expressed in coefficient as well as in dimensional form, so that those for airplanes of widely different weights and dimensions can be compared.
Date:
May 1931
Creator:
Miller, Marvel P. & Soulé, Hartley A.
System:
The UNT Digital Library
The pressure distribution over a semicircular wing tip on an airplane in flight
This note presents the results of flight pressure distribution tests on the right upper wing panel of a Douglas M-3 airplane equipped with a semicircular wing tip. The results are given in tables and curves in such form that the load distribution for any force coefficient within the usual range encountered in flight may easily be determined.
Date:
May 1931
Creator:
Rhode, Richard V. & Lundquist, Eugene E.
System:
The UNT Digital Library