AN AIRPLANE WITH UNCONVENTIONALLY PLACED PROPELLER POWER UNIT

The Hats significance of the influence of operating propellers on the aircraft aerodynamic characteristics is well-known.Wind tunnel testing of an airplane model with operating propellers is a complex task regarding the required similarity of the full-scale and the model case.Matching sufficient similarity in axial and rotational velocities in the

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Experimental Study on the Effect of Initial Water Content and Temperature Gradient on Soil Column Segregation Frost Heave

A series of freezing experiments were carried out on the Qinghai silty clay using a one-dimensional soil column particle image velocimetry (PIV) system.The effects of the initial water content and temperature gradient on the frost heave of the soil column were analysed.The experimental results show that the total volumetric water content after the

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Comparison of visual requirements and regulations for obtaining a copyright in different European countries and some open questions on their adequacy

We reviewed the current state of knowledge regarding visual function and its suitability as part of medical examinations for driving licenses.We focused only on Group 1 drivers.According outdoor toys to previous studies, visual acuity, which is the most common test, is weakly associated with a higher risk of road accidents, with a greater role of v

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