How many blades on a helicopter?

There is no single answer to the question of how many blades a helicopter has. Depending on the type of helicopter and its purpose, it can have as few as two blades or as many as eight blades. The most common number of blades for a helicopter is four, but there are also helicopters with five, six, or seven blades. The number of blades on a helicopter is determined by a number of factors, including the helicopter's size, weight, and intended use.