What Type Of Fuel Is Used To Run A Helicopter And An Aeroplane? Is It Simple Petrol / Diesel That We Understand Or Is It Special Fuel?

The fuel used to power aircrafts is a specialized type of petroleum-based fuel and is called as Aviation fuel. There are number of variations in this aviation depending on the type and make of helicopters and aeroplanes such as Avgas, Jet fuel etc. You can know in detail about these kinds of aviation fuels at the link below:
en.wikipedia.org

It is special fuel