there are some planes designed so that the wings are made of propellor blades so that it rises straight up of the ground, but the differemce is that its still called a plane, not a helicopter
Planes have large wings, Helicopters have rotors
No, there are many more planes flying for longer periods than helicopters.
No because Liberty City is too small so planes cant get used but if you could it would be awesome.
Because they are designed to land in very small spaces.
Helicopters has a limited range compared to planes. Planes need a long pave to operate while helicopters can take off and land a lot more places. Also helicopters can "stand still" in the air while planes need to move all the time. So depending on what you want to do they have different (dis)advantages.
Planes cannot land straight up and down
there are no propllers on planes but there are on helicopters
They make both.
Yes, especially helicopters.
you cant
Helicopters can fly directly up or down.
With the exception of certain jump jets, helicopters can land easier than planes and better maneuverability. Planes are much faster and can carry stronger air to air weapons or bombs, but helicopters have better air to ground precision weapons. Helicopters are better for ground force support. helicopter requires less space instead of planes.