Vertical take off and set down for one Helicopters can hover.
Helicopters have 2 sets of blades to keep the helicopter balanced. This is due to the unique shape of the helicopter.
They make both.
You believe
2
The anagram is "helicopters."
They fly helicopters.
Helicopters are machines, they can not grow.
Helicopters are about 200 feet
A group of helicopters.
what are the grey helicopters for
yes, helicopters are dangerous
The alliteration for helicopters could be higher helicopters or heavy helicopters