While not impossible, that would be an AMAZINGLY rare configuration. A plane biult like that would be lopsided, have different drag/thrust from one side to Another. Most likely, you've simply seen planes at an angle that hid one Engine from view.
The configuration to date would not work. There have been craft constructed with 2 cockpits (one on either wing) with a central engine on the mainframe and there have been 3 engine where one is mounted each side of the fuselage and one of the fuselage under or rear of cockpit. The configuration in all designs previously and currently has had to be symmetrical. The load placed on the wing with a one to two factor engine would cause the craft to have to be flown nearly diagonally with the counter thrust taken up by the tail section.
Yes, jets are planes but jets are mostly known as supersonic planes.
Ordinary jet engines are used on aircrafts. But some planes require turbojet engines. These planes fly at more than the speed of sound. There are other type of airplane types too.
It isn't a matter of why they need it! Some planes are just designed with jet engines! Jet engines take a small amount of air and push it out fast whereas props take a large amount of air and push it back slower! Some planes just have jet engines!
If a given plane has four engines, they are all used and needed to carry out a normal flight. It is absolutely uncommon to shut down engines inflight. On the ground at taxi-in or taxi-out, one or two engines can be shut down to save some fuel. A four engined aircraft can actually fly on only two engines in some cases (though only if the other engines have failed)
They didn't. All American carrier planes had radial engines but some Japanese and British aircraft had liquid-cooled engines, also planes built in Germany for their carrier which was never finished had liquid-cooled engines. Radial engines were used in most cases because they were more rugged than other engines, a pilot would only need to watch his oil pressure gauge whereas using a different engine he would also have to check his coolant, and a single bullet in a liquid-cooled engine could cause it to seize up in a short time.
yes Most airplanes other then gliders need fuel to fly some planes run on normal internal combustion engines and others run on jet engines but they all require fuel to operate them.
No, planes have either a rotary or turbine engines and most vehicles (excluding the Mazda RX-7 and RX-8, which both have rotary engines) have crank and piston engines. Some small planes (such as the piper cub) have piston props. In fact, the Rolls Royce merlin engine used in the spitfire was also used in some custom/modified cars.
High-speed planes typically use turbojet or turbofan engines. Turbojet engines are designed for maximum speed and efficiency at high altitudes, while turbofan engines provide a balance of speed, efficiency, and noise reduction, making them more common in commercial aviation. In some military aircraft, afterburners may be used in conjunction with these engines to further increase thrust during supersonic flight.
In most large transports the wheel wells are in the central fuselage where the cargo bays are. In some other aircraft wheels fold outwards and are hidden in pods behind the inner engines.
The engines compress outside air in their compressors and some of this is tapped off at the right pressure to replace cabin air.
Some planes travels around 50 knots and over. It depends on the engine type and turbine strength. Some airplanes have stronger engines so they can travel far. In this case probably some planes travel around 500 knots and over when they cruise 30000 feet of altitude and over. This mostly applies to Boeing planes. Some smaller planes like cessna only fly around 120 knots to 200 knots about.
The number of spark plug in a 4-cylinder engine depends on the type of engine you have. Some engines only have four spark plugs on the intake side for the ignition of the fuel. Other engines have eight spark plugs, four on the intake side to ignite the fuel and four on the exhaust side to ignite the exhaust fumes.