The variation in pressure in the cabin of an airplane in flight

The pressure in the cabin of a Fairchild cabin monoplane wa surveyed in flight, and was found to decrease with increased air speed over the fuselage and to vary with the number and location of openings in the cabin. The maximum depression of 2.2 inches of water (equivalent pressure altitude at sea level of 152 feet) occurred at the high speed of the airplane in level flight with the cabin closed

The Effect of Fillets Between Wings and Fuselage on the Drag and Propulsive Efficiency of an Airplane

Tests were made to determine the effect of fillets between wings and fuselage on the drag and propulsive efficiency of a high-wing cabin monoplane. These tests were made in the 20-foot Propeller Research Tunnel of the National Advisory Committee for Aeronautics

Effect of the Angular Position of the Section of a Ring Cowling on the High Speed of an XF7C-1 Airplane

The tests herein reported were conducted by the NACA to determine the effect of the angular position of the section of a ring cowling on the speed of an airplane having a radial air-cooled engine

Methods of Visually Determining the Air Flow Around Airplanes

This report describes methods used by the National Advisory Committee for Aeronautics to study visually the air flow around airplanes. The use of streamers, oil and exhaust gas streaks, lampblack and kerosene, powdered materials, and kerosene smoke is briefly described. The generation and distribution of smoke from candles and from titanium tetrachloride are described in greater detail because they appear most advantageous for general application. Examples are included showing results of the various methods

Review Essay: Landscapes/Voices In/Of Transition/Transformation

Krog, Antjie. (2003). A Change of Tongue. Johannesburg: Random House.Pieterse, Edgar, & Meintjies, Frank (Eds). (2004). Voices of the Transition: The Politics, Poetics and Practices of Social Change in South Africa. Sandown: Heinemann

Asteroseismic study of solar-like stars: A method of estimating stellar age

Asteroseismology, as a tool to use the indirect information contained in stellar oscillations to probe the stellar interiors, is an active field of research presently. Stellar age, as a fundamental property of star apart from its mass, is most difficult to estimate. In addition, the estimating of stellar age can provide the chance to study the time evolution of astronomical phenomena. In our poster, we summarize our previous work and further present a method to determine age of low-mass main-sequence star.Comment: 2 pages, 1 figures, submitted to IAUS25

Comparative Performance Obtained with XF7C-1 Airplane Using Several Different Engine Cowlings

Discussed here are problems with the use of cowlings with radial air cooled engines. An XF7C-1 airplane, equipped with service cowling and with narrow ring, wide ring, and exhaust collector ring cowlings over the service cowling, was used. For these four cowling conditions, the rate of climb and high speed performance were determined, the cylinder conditions were measured, and pictures to show visibility were taken. The level flight performance obtained with an engine speed of 1900 r.p.m. for the service type, the narrow ring, the wide ring, and the exhaust collector ring was 144.4, 146.6, 152.8, and 155 mph, respectively. The rate of climb was practically the same for each type tested. The visibility was not materially impaired by the use of the wide or the narrow cowlings. With the narrow ring and exhaust collector ring cowlings there was an increase in cylinder temperature. However, this increase was not enough to affect the performance of the engine. The use of an exhaust collector ring incorporated into the cowling is practical where the problem of visibility does not enter

Rewording the World: Poststructuralism, Deconstruction and the ‘Real’ in Environmental Education

In this paper we question the desirability of the near-schism between (on the one hand) environmental philosophers, advocates and educators who appear to be antagonistic to, and/or dismissive of, poststructuralism and deconstruction and (on the other hand) those that find these philosophies and methodologies generative in their inquiries. We examine the claims of writers who assert that poststructuralism and deconstruction are anti-realist positions and suggest alternative ways of thinking about these matters that might enable environmental educators who currently take opposing positions to work in more commensurable ways

Insecticidal control of white grubs (Coleoptera: Scarabaeidae) on the Atherton Tableland, with observations

Eight chemical treatments were tested against large larvae of Lepidiota spp. in maize and groundnuts on the Atherton tableland, Queensland. Terbufos at 2 and 4 kg a.i./ha increased yields by up to 0.985 t/ha in maize