fly2school

Oldest Aircraft The oldest passenger planes in service took to the skies in the 1970’s and are all Boeing aircraft. The plane has been serving passengers since April 16, 1980. 90% of the oldest planes that still serve commercial flights belong to Boeing and the majority of them are 737 jets. The Bleriot XI was just as successful when flown by other pilots, and it was a rare air meet in Europe that did not feature a Bleriot XI among the prizewinning aircraft. By 1913, Louis Bleriot's factories had delivered no less than 800 examples of the Bleriot XI, an amazing production run for the time, especially for an aircraft priced at about $5,000. Bleriot schools turned out many aviators and, of course, used Bleriot trainers.

Propagation of Sound in a medium Sound needs a material medium like solid ,liquid or gas to travel and be heard because the molecules of solid, liquid and gases carry sound waves from one place to another. Sound cannot travel through vacuum or empty space because vacuum has no molecules which can vibrate and carry sound waves. Sound is a sequence of waves of pressure which propagates through compressible media such as air or water. Sound can propagate through solids as well, but there are additional modes of propagation. During their propagation, waves can be reflected, refracted, or attenuated by the medium. Electromagnetic and gravity waves do not require a medium to propagate, meaning they can propagate in vacuum as well as compressible media such as air and water. Thus, a “medium of propagation” is any substance that supports the act or process of causing to multiply or spread something out into new regions.

Radar - Can you fly an aircraft without being detected in Radar? Radar, or the  Ra dio  Detection a nd  Rangin g, is a detection technique that employs radio waves to discover the position or speed of a faraway object. The technology is being applied around the globe in the detection of aircrafts, ships, missiles etc. The system is built with a transmitter that emits the radio waves, an antenna that can transmit and receive the waves, and a receiver that has a processor to evaluate and obtain the properties of the object under inspection. Radio waves are continuously emitted from the transmitter. The waves that are reflected off the object are received by the receiver. The processor uses the data to evaluate the object’s position and speed.   There is a coverage area for the radar and it depends on the terrain and the distance from the site. Tall buildings or mountains can block and reflect back the radio waves to the radar. This is called clutter. Thus ...

When a sound wave strikes a surface such as a floor, wall, or ceiling, the direction of travel is changed by reflection. Reflection of sound waves follow the same physical law as light reflection. The angle of the incidence equals the angle or reflection. As sound waves move they interact with physical objects. Soft surfaces will absorb sound while hard surfaces will reflect it. Hard surfaces reflect sound and soft surfaces absorb sound. Leonardo Da Vinci and Galileo experimented with sound waves and their properties. The establishment of just who was first to discover the theory of sound reflection is a little enigmatic. Things that vibrate a lot, such as car engines, can make a tremendous noise; they sound louder because the sound waves they generate carry more energy. The amount of energy carried by a sound wave is called its intensity. Sound waves of higher intensity are louder to our ears. Reflection is the change in direction of a wave front at an interface between two di...

Sonar Sonar is a method or device for detecting and locating objects especially underwater by means of sound waves sent out to be reflected by the objects also. A device for detecting the presence of a vessel like submarine, by the sound it emits in water. NOAA scientists primarily use sonar to develop nautical charts, locate underwater hazards to navigation, search for and map objects on the seafloor such as shipwrecks, and map the seafloor itself. A maximum operating range of 10 to 100 kilometers is typical. In comparison, passive sonar simply listens to underwater sounds, which includes: natural turbulence, marine life, and mechanical sounds from submarines and surface vessels. Since passive sonar emits no energy, it is ideal for covert operations. Sonar can kill you if you are close enough to it. The U.S. Navy's sonar emits 235-decibel pressure waves of unbearable pinging and metallic shrieking. At 200 Db, the vibrations can rupture your lungs, and above 210 Db...

What is Regenerative Braking? Regenerative braking is an energy recovery mechanism which slows a vehicle or object by converting its kinetic energy into a form which can be either used immediately or stored until needed. This braking uses an electric vehicle's motor as a generator to convert much of the kinetic energy lost when decelerating back into stored energy in the vehicle's battery. Basically, the most efficient way to drive any vehicle would be to accelerate to a constant speed and then never touch the brake pedal. Any danger can arise if regenerative braking is applied to two-wheel-drive brake systems. However, regenerative braking does have various benefits. A proper implementation of regenerative braking system extends driving range, improves braking efficiency, reduces brake wear, and improves energy conservation. In a battery-powered electric vehicle, regenerative braking is the conversion of the vehicle's kinetic energy into chemical energy stor...

What is Arrested landing? An aircraft, to land on the flight deck, each plane needs a tail-hook, which is exactly what it sounds like, an extended hook attached to the plane's tail. A plane landing on a carrier moves from about a 150 mph to zero in seconds. Aside from planes capable of vertical flight like the Harrier, tail-hooks are a required feature on carrier-based fixed-wing aircraft. Such a hook is designed to snare a thick arresting wire strung across the deck of an aircraft carrier that slows the plane and allows it to land in a confined space for safer landing.

What is the true reason of Gravity? An average person probably doesn’t think about Gravity on a daily basis, but yet gravity affects our every move. Because of gravity, we fall down, objects crash to the floor, and we don’t go flying off into space when we jump in the air. The old adage, “everything that goes up must come down” makes perfect sense to everyone because from the day we are born, we are seemingly bound to Earth’s surface due to this all-pervasive invisible force. The closer the objects are to each other, the stronger their gravitational pull is. Earth's gravity comes from all its mass. All its mass makes a combined gravitational pull on all the mass in your body. That's what gives you weight. Einstein's general theory of relativity explains gravity as a distortion of space or more precisely, space time, which is caused by the presence of matter or energy. A massive object generates a gravitational field by warping the geometry of the surroundin...