Bearings are used in many of the machines we use on a daily basis. If bearings didn’t exist, we would be constantly replacing parts, which would inevitably slow down productivity. The bearing parts were designed with a simple concept in mind— objects can roll better than they can slide. Bearing design is based on the magnitude and direction of the load that they are intended to support.
Bevel gears are gears where the axes of two shafts intersect, and the tooth-bearing faces of the gears themselves are conically shaped. Bevel gears are typically mounted on shafts that are 90 degrees apart but can be designed to function at other angles as well. One of the most common use of bevel gears is in the differential of a vehicle, where it transmits power generated by the power engine to the vehicle’s wheels.
To understand how an airplane’s wings keep it in the sky, we first have to understand the forces influencing all aircraft - thrust, drag, lift, and weight. Thrust is the force that propels the aircraft forward provided by its engines, both piston and jet turbine. Drag is the force trying to pull the aircraft back, generated as the aircraft displaces the air in front and around it. Lift is the force generated by the airplane’s wings and the flow of air over and below them, while finally weight is the force of the Earth’s gravity trying to pull the plane back to the ground.
Vehicles go, but how do they stop? What components are involved in bringing a moving object to a halt? The answer lies within the aircraft braking system, specifically, brake calipers. Brake calipers play a crucial role in allowing your vehicle to stop and contribute to the overall safety of its operation. Understanding how they function can be essential in comprehending how the differing systems of your car.
Helicopters typically have a 14- or 28-volt direct current electrical system. A volt is a unit of measurement that expresses the capability of the force that pushes electrical energy. Amperes are the unit of measurement for a current and describe the measure of an electrical quantity that is available in the system. Small piston-powered helicopters use an engine driven alternator because they are light, low maintenance, and produce a uniform electric output— even at low RPMs. In a turbine powered helicopter, starter/ generator systems are used. Once the engine is started, the battery powers the starter, which turns the engine. After this initial jump, the generator is powered by the engine.
Helicopters fly using the same aerodynamic concepts that airplanes use; they use an airfoil to generate lift. The difference is that helicopters generate vertical thrust while aircraft generate horizontal thrust. When an airplane moves forward, the air flows across the wing and produces downwash which creates lift; the airplane has to gain enough speed for this force to overcome weight. When helicopter blades, or airfoils, begin spinning, it produces downwash which then creates lift. Speed is an important factor in generating enough force to overcome the weight in a helicopter as well. Vertical thrust allows a helicopter to take off vertically and hover.
ATA chapters are highly valuable to aircraft repair stations. Each code is designated to a specific part of the aircraft. These codes were originally made by the Air Transport Association (ATA) in 1956; they have seen been adopted by all major airlines and OEMs. The ATA chapters are designed with 3 sets of two-digit numbers, typically in an AB-CD-EF format. The first two digits are the most important.
The aviation industry has seen a massive increase in recent years, with people flying now more than ever. But, like with all industries, it is sensitive to the ups and downs of the economy. So, airlines are increasingly finding themselves embracing a more financially driven corporate culture. Below are 5 key trends that will shape commercial airliners.
Aircraft superchargers are an important part of aircraft engines. As an aircraft reaches higher altitudes, there is less air pressure and air density, so a piston engine no longer is enough to power the aircraft. That’s where superchargers come in. Superchargers are engine-driven air pumps or compressors that provide compressed air to the engine, which then provide additional pressure to allow the piston engine to produce more power. A normal piston engine cannot have a manifold pressure higher than atmospheric pressure on its own, but with a supercharger, we can increase the pressure inside manifold by 30 “Hg.
Jet Engines revolutionized air travel since their inception the late 1930s. These amazing aircraft engines were so powerful they were capable of outpace, maneuver, and just downright outperform any other plane before it by an extraordinary margin. They completely changed the way wars, travel, and deliveries were handled after their inception. Travelling on jet engine powered planes, we are all familiar with the baggage travelling has, however, before jet engines it took 25 hours to fly from Los Angeles to New York. Today, people save time and even have much interest in what the jet engine made possible they go to air shows showcasing the extraordinary abilities of these aircraft equipped with jet engines. The maneuvers and speeds these aircraft achieve is incredible.
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