PreScouter

Reaction Engines (RE), a UK-based company, receives $37.4 million strategic investment “boost” from aerospace giants Boeing and Rolls-Royce to develop a novel class of engines combining jet and rocket technologies.  Supersonic flight: An introduction Short definition: Supersonic flight is being able to fly faster than the speed of sound. For vehicles travelling in conditions of 68° Fahrenheit (20° Celsius) at sea level, this is about 768 mph, or 1,236 km/h. Supersonic speeds are also classified in terms of Mach numbers. The Mach number is the ratio of the speed of the vehicle to the speed of sound. So, a vehicle travelling at exactly the speed of sound is travelling at Mach 1. Mach numbers are also used to define various high speeds:  Supersonic: Speed that is faster than Mach 1. Subsonic: Speed that is slower than Mach 1. Transonic: Speed that is between Mach 0.8-1.2 All modern passenger aircraft are subsonic and most modern fighter jets are supersonic....

The spiral pump (also known as water wheel pump) is a hydraulic machine that pumps water without electricity. With the global efforts to reduce carbon emissions, the increased focus on renewable energy is making the spiral pump a viable option for pumping water, especially in rural areas and developing countries. Simple installation and low maintenance costs make the spiral pump a favorable, environmentally-friendly alternative.  What Is a Spiral Pump and How Does It Work? A spiral pump is constituted of a pipe wrapped around a horizontal axle, generating a spiral tube that is fastened to a water wheel. The water wheel is in flowing water, so that the water in the river provides the energy necessary for the rotation of the wheel. Hence, the spiral tube also rotates. When the inlet surface of the tube (the tube’s external extremity) passes into the river, water enters into the tube. This water volume moves toward the outlet of the tube (the internal extremity), at the center of...