a vertical of course trust me
The main blade on a helicopter is the 'rotor'
There really isn't a "better" - they have different uses and roles. Both are very useful in their role
In 1907 Paul Cornu was experimenting with a vertical lift rotor blade system and performed the first VTOL (vertical take off and landing) flight, thus inventing the first helicopter. The helicopter was initially an idea by Leonardo Da Vinci. he developed an ornithocopter which set the basis for the structure of the modern Helicopter
rotor
Helicopter Blades are bolted onto the main rotor
Metal bandsaws are used for the purpose of cutting metal. These saws are available with either a vertical or horizontal blade and usually also have brushes to prevent metal chips from getting stuck in the teeth of the blade.
it is a wedge because is changes the vertical force into a horizontal force to push the wood apart
A band saw that has a blade that cuts horizontal instead of vertical. One use is for cutting trees into lumber. By cutting it horizontally, the cut board lays on the trunk after cutting so it doesn't fall off or get damaged.
A rotor.
It has a rotor blade instead of wings.
It is called the rotor.
you go to reality tv go on to the helicopter blade jump and flip then you land on the middle of the helicopter blade then ta-da your brake dancing.