1,704 research outputs found
Modelling the temperature, maturity and moisture content in a drying concrete block
In this paper we continue work from a previous Study Group in developing a model for the maturation of concrete. The model requires equations describing the temperature, moisture content and maturity (or amount of cement that has reacted with the water). Non-dimensionalisation is used to simplify the model and provide simple analytical solutions which are valid for early time maturation. A numerical scheme is also developed and simulations carried out for maturation over one day and then two months. For the longer simulation we also investigate the effect of building the block in a single pour or two stages
Flight Measurements with the Douglas D-558-II (buaero No. 37974) Research Airplane : Static Lateral and Directional Stability Characteristics as Measured in Sideslips at Mach Numbers up to 0.87
A flight investigation of the handling characteristics of a fighter airplane controlled through automatic-pilot control systems
Preliminary measurements of the dynamic lateral stability characteristics of the Douglas D-588-II (BuAero No. 37974) airplane
Comparison of predicted and actual control-fixed stability and control characteristics of a Douglas A-26B airplane
Preliminary flight measurements of the static longitudinal stability and stalling characteristics of the Douglas D-558-II research airplane (BuAero No. 37974)
Flight Measurements of the Longitudinal Stability, Stalling, and Lift Characteristics of an Airplane Having a 35 Degrees Sweptback Wing Without Slots and with 40-percent-span Slots and a Comparison with Wind-tunnel Data
Flight Measurements of the Stability, Control, and Stalling Characteristics of an Airplane Having a 35 Degree Sweptback Wing Without Slots and with 80-percent-span Slots and a Comparison with Wind-tunnel Data
Flight Measurements of the Lateral and Directional Stability and Control Characteristics of an Airplane Having a 35 Degree Sweptback Wing 40-percent-span Slots and a Comparison with Wind-tunnel Data
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