the engine inside causes the propeler to spin
No.
Airsoft and helicopters don't work well together because the wind from the propeller will blow the bb.
Helicopters have improved and changed since they were first made. Many people and companies still work daily on improvements.
They call it "break down," not "get sick." Helicopters vibrate. A LOT. You have to work on them all the time because the vibration causes parts to fall off.
They can hover, work on oil rigs, land in small clearings.
Oil rig work, firefighting, military work, rescue tasks.
They fly helicopters.
A group of helicopters.
Helicopters are about 200 feet
Helicopters are machines, they can not grow.
yes, helicopters are dangerous
what are the grey helicopters for