Well yes, assuming if an airplane does not have a jet engine, it would not be called a jet.
If you are asking about carburetor jets, then they are made from brass. Jet engines, are made with many different materials, the main one probably is titanium.
super engines
There is no actual answer, because a jet is called a jet because it has at least one jet engine.
Piston engines on small private helicopters and jets on almost all commercial and military helicopterd
Aviation fuel, similar to kerosene. Only smaller aircraft with piston engines use a fuel similar to gasoline, called AVGas (Aviation gasoline) Military Jets use fuels specially designed for Jet Propulsion, these formula are known by JP-#, Commercial Jets use Jet-A.
An engine producing THRUST keeps an airplane moving forward. Types of engines used by airplanes include reciprocating engines, turbo prop engines, turbojet, and turbofan engines. Some manufacturers are developing electric engines and one bicycle racer powered a very lightweight airplane using pedal power connected to a propeller.
Jet Engine is used in jets.
jets are used for wars, shows and displays.
Early helicopters all used piston engines up to the 1960's . Now most helicopters use jets, except for a few small civilian helicopters. The jets are connected to a very strong and complex transmission which turns the main and tail rotors.
The Newer Cobra Jets Are only for Drag Racing and Are illegal on the street. Older Mustangs with the Cobra Jet Engine In it Were legal on the street and sometimes used for drag racing. So older Mustang Cobra Jets were not only made for racing but newer ones are only made for racing.
Jets are used in War purposes. The Stealth ones are used to spy other countries.
Diesel engines use propane to go faster, only gas engines use NOS