Jet air craft history
An aircraft is a machine that is able to fly by gaining support from the air . It counters the force of gravity by using either static lift or by using the dynamic lift of an airfoil ,  or in a few cases the downward thrust from jet engines . Common examples of aircraft include airplanes , helicopters , airships (including blimps ), gliders , and hot air balloons . 
The human activity that surrounds aircraft is called aviation . Crewed aircraft are flown by an onboard pilot , but unmanned aerial vehicles may be remotely controlled or self-controlled by onboard computers. Aircraft may be classified by different criteria, such as lift type, aircraft propulsion , usage and others.
Flying model craft and stories of manned flight go back many centuries, however the first manned ascent – and safe descent – in modern times took place by larger hot-air balloons developed in the 18th century. Each of the two World Wars led to great technical advances. Consequently, the history of aircraft can be divided into five eras:
Jets capture nearly everyone’s imagination, and it’s not hard to see why. They’re fast and powerful, and they look really cool, so it’s no surprise that people are thrilled to see them. However, not every jet is an awesome airplane like the F-16. Indeed, hundreds of mediocre, if not outright terrible, jet aircraft have seen service. Here are 10 of the worst jets to take to the air. They failed for a variety of reasons, but the common thread is that nobody wanted to fly these turkeys.
Before being acquired by Northrop Grumman, Vought produced some of the United States Navy’s best-known and most successful fighters. During World War II, Vought designed the F4U Corsair, which saw service in the Pacific theater, and during Vietnam, naval aviators used Vought’s F-8 Crusader. In between, Vought produced a variety of unusual aircraft, chief among these being the F7U Cutlass. Designed to modernize the US Navy, the F7U ended up being a dangerous and unreliable airplane, ending the lives of many pilots through crashes and accidents.
The Cutlass was a unique design for the time, completely abandoning tail control surfaces in favor of a large swept-wing design inspired by wartime Messerschmitt experimental fighters. However, during testing, problems became obvious. Although the Cutlass was fast, it struggled to stay aloft in certain flight regimes and had huge problems with its engines. Powered by early Westinghouse turbojets, the Cutlass did not have enough thrust to perform well during takeoff and landing. The first three prototypes crashed , as did the first two airplanes delivered to the Navy. Still, the Cutlass went into full production. Pilots joked that Westinghouse toasters had more power than Cutlass engines.
If you’re just starting to consider the possibility of owning your own aircraft, one of the first things you may want to understand is the difference between piston engine powered aircraft and turboprop aircraft. Understanding the differences - and selecting the right aircraft for your needs - will ensure years of happy missions!
Piston engines, also known as reciprocating engines, are descendents of steam engines which first appeared in the early 17th century. In simple terms, steam engines use heat to produce steam pressure, which in turn is used to generate rotating motion.
Steam engines were eventually used to drive everything from mechanical equipment to the first railway trains. In today’s aircraft piston engines, gas propulsion replaces steam in creating pressure within the engine.
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