High octane fuel also known as Jetfuel or Avgas
Many aircraft use nitrogen in their tires
For light and propellor-driven aircraft, usally avgas. Helicopters and aircraft with gas turbine or jet engines, JetA1
Most common use is in Exhaust Gas Temperature probes.
Most small engine aircraft such as Cessna's use a low leaded gas, usually blue in colour. But a lot of Cessna's can be converted to use regular gas that you would use in a car.
Natural gas - some of them could I guess. It depends on the type of aircraft and what the engine is designed for. Usually (I'd guess 95% of the time) piston aircraft (many of the smaller propeller airplanes) use "Avgas" (Aviation Gasoline) which is similar to the gasoline used in cars except it has a higher octane rating (say between 100 and 130) than the typical gas used by cars (which might be 85 to 90 octane). Jet propelled aircraft use "Jet Fuel" which is similar to Kerosene or Diesel fuel used by large trucks. If the aircraft engine was designed to use natural gas then that's what it would run on.
Nitrogen is used in many aircraft tires.
There are many different versions of Cessna aircraft. Many of the smaller ones use a version of the Lycoming 360, a flat 4 gas engine. Some of the larger ones use a PT6 A turboprop.
nickel
nickel
The perfect aircraft to use as a 'Utility Aircraft', would be any type of the Hercules Range of Aircraft.
Exhaust Gas Temperature
gas