Pending on the type of engine, most are pull engines, the engine pulls (or pushes) the plane along. As it starts to gain speed, the quick air flow underneath the wings provides lift so that it can fly. Then if you took the engines away in mid flight (hypothetically), the plane would eventually slow down and start to lose its lift under the wings, then eventually crash or land (depending on how good the pilot is). So the engine provides the ability to stay in flight with heavier aircraft such as the F-16 or P-51 just for examples for much longer periods of time as compared to gliders.
Usaly
Yes, jets are planes but jets are mostly known as supersonic planes.
Smaller planes have piston engines, but bigger planes like the Boeing 717-777 and other planes have turbine engines
its engines
You have to have at least one. (If you don't have an engine, your are classified as a glider.) The largest planes typically run 4 or 6 jet engines. Most planes have 1,2,3,4 or 6 engines. Very large aircraft sometimes have more. There are propeller planes, turbo prop and jet engines. There are also VTOL Vertical TakeOff and Landing planes, such as the Harrier and Osprey
Planes powered by internal combustion engines came first.
The engines propel the airplanes.
airplanes and aircraft
No, that's what makes them gliders.
It depends on where the engines are if its on the wings then no
Jet planes fly with the help of Thrust and Lift produced by the jet engines.
Gasoline-fueled piston engines and turbojets.