Normally aspirated engine

Normally aspirated engines
When your engine is not equipped with a turbo- or supercharger it will also suffer from the less dense air.

Normally Aspirated Engine: An aero-engine the cylinder charge of which is normally taken in at the existing atmospheric pressure and temperature.
Norte (pronounced "nortey"): A cold, dry wind from the north over the Gulf of Mexico.

The geared engine is no different, but unfortunately, most pilots tried to use the engine just like normally aspirated engines.

In a normally aspirated engine, the carburetion process can lower the temperature of the incoming air as much as 60 degrees Fahrenheit.

See also: Maintain, Plane, Temperature, Wind, Aviation