An aeroplane is a heavier-than-air machine supported by the pressure of its planes on the air. An airship is
lighter than air. It is propelled in the same way as an aeroplane, and it can be made to rise or fall by means of
planes.
An aeroplane is a heavier-than-air machine supported by the pressure of its planes on the air. An airship is
lighter than air. It is propelled in the same way as an aeroplane, and it can be made to rise or fall by means of
planes.