Most engines are made of cast iron, some are aluminum alloys those are pretty much the primary materials used for engines. presently engines are designing with plastic. These engines are used in racing and high end cars.
most siege machines are made from wood
Different Materials like metal and Fiber Glass
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.
Helicopters are made with sophisticated specialized engines and heavy materials which is fueled with special gas. They are also made of steel which makes it really heay.
some marine engines are reverse rotation, Also marine engines are made from anti corrosive materials, they are heavy duty and can tolarate vibrations of your ship.
Wood. And various other materials.
Wood. And various other materials.
Crude oil
Aluminum
how can i make p type n type material
adobe bricks
A biodiesel is any variety of fuel for diesel engines made from renewable organic raw materials as opposed to fossil hydrocarbons.