Calculation of horsepower available : appendix to estimation of the variation of thrust horsepower with air speed
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Ober, Shatswell↗
Engineering topics
Ober, Shatswell
Publications and source records attributed to Ober, Shatswell.
Some studies on the aerodynamic effect of the gap between airplane wings and fuselages
The general result indicated by this study is that if desirable from any viewpoint the gap between wing and fuselage may be closed without detrimental aerodynamic effects, and with a given monoplane there is less drag if the wing is directly on top of the fuselage than if it is parasol.
Ober, Shatswell↗
Some experiments on autorotation of an airfoil
These experiments show that the rate of auto rotation of a monoplane airfoil is reduced by sweepback, ceasing entirely when the sweepback is 30 degrees. In addition a very serious increase in rate and range of auto rotation with yaw is shown.
Ober, Shatswell↗
The estimation of airplane performance from wind tunnel tests on conventional airplane models
Calculations of the magnitude of the correction factors and the range of their variations for wind tunnel models used in making aircraft performance predictions were made for 23 wind tunnel models. Calculated performances were compared with those actually determined for such airplanes as have been built and put through flight test. Except as otherwise noted, all the models have interplane struts and diagonal struts formed to streamwise shape. Wires were omitted in all cases. All the models were about 18 inches in span and were tested in a 4-foot wind tunnel. Results are given in tabular form.
Warner, Edward P↗
Note on the Katzmayr effect on airfoil drag
The reduction of drag of an airfoil when the air stream is oscillating is called the Katzmayr effect. The purpose here is to offer a simple explanation of the cause of the Katzmayr effect.
Ober, Shatswell↗