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Additional Test Data on Static Longitudinal Stability

Description: From Summary: "The purpose of this investigation was to explore the influence of weights of the controls on the stability with elevator released. The available test data were extended to stability with elevator locked. In this connection the study of the propeller effect seemed of vital importance."
Date: August 1934
Creator: Hübner, Walter
Item Type: Refine your search to only Report
open access

General equations for the stress analysis of rings

Description: In this report it is shown that the shear, axial force, and moment at one point in a simple ring subjected to any loading condition can be given by three independent equations involving certain integrals that must be evaluated regardless of the method of analysis used. It is also shown how symmetry of the ring alone or of the ring and the loading about 1 or 2 axes makes it possible to simplify the three equations and greatly reduces the number of integrals that must be evaluated. Application of… more
Date: August 10, 1934
Creator: Lundquist, Eugene E. & Burke, Walter F.
Item Type: Refine your search to only Report
open access

Influence of Cut-Outs in Elevator on the Static Longitudinal Stability and on the Static Elevator Effect

Description: "The rudder effect of a sport airplane at high angles of attack was to be improved. This made it necessary to make a cut-out in the center of the continuous elevator so as to enlarge the rudder downward. This cut-out which reduced the rudder area by 12.5 percent changed the static stability of the airplane as well as the elevator effect" (p. 1).
Date: August 1934
Creator: Biechteler, Curt
Item Type: Refine your search to only Report
open access

Investigation of boundary layers on an airplane wing in free flight

Description: "This report describes the equipment and method developed for recording the boundary layers on the surface of an airfoil in free flight. The results are in close agreement with the wind-tunnel tests of other experimenters. The intensity of the turbulent boundary layer, even at the much higher Reynolds Numbers reached, is determinable with Gruschwitz's formulas, although it was impossible to definitely establish a direct relationship between the turbulent boundary layer and the Reynolds Number w… more
Date: August 1934
Creator: Stüper, J.
Item Type: Refine your search to only Report
open access

Measurement of altitude in blind flying

Description: In this note, instruments for measuring altitude and rate of change of altitude in blind flying and landing of aircraft and their performance are discussed. Of those indicating the altitude above ground level, the sonic altimeter is the most promising. Its present bulk, intermittent operation, and more or less unsatisfactory means of indication are serious drawbacks to its use. The sensitive type aneroid altimeter is also discussed and errors in flying at a pressure level and in landing are dis… more
Date: August 1934
Creator: Brombacher, W. G.
Item Type: Refine your search to only Report
open access

Preliminary Wind-Tunnel and Flight Tests of a Balanced Split Flap, Special Report

Description: One disadvantage that has been apparent in the operation of split flaps as used to date is the time and effort required to operate them. In this communication an investigation is being made of possible means for balancing them aerodynamically to make their operation easier. Several arrangements have been tested in the 7 by 210 foot wind tunnel, and the results of the wind-tunnel tests as well as preliminary flight tests on one of the more promising forms are given in this paper.
Date: August 1934
Creator: Weick, Fred E. & Thompson, Floyd L.
Item Type: Refine your search to only Report
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