Yup, and they don't need a runway.
To not have to walk
He invented it because he had to find a suitable game to play in PE because he lived in Massachusetts.
Depends on the purpose and make of the helicopter.
so you can communicate
to color
The purpose of inventing the machine gun was to have better fire power during the wars to defends places and win positions and the war.
Slicing meat.
It was to replace horses as a means of transportation.
He built the telescope because he saw his children play with lenses and he got the idea of making it
To take pictures and to capture the memorable moments.
So people can listen to amazing music.
To ease healing and avoid infection.