Why a helicopter can land without wheels
A helicopter does not need to roll along a runway to take off. Its rotor can generate lift while the aircraft is stationary, so the landing gear mainly has to support the helicopter on the ground and absorb the force of touchdown. Two long skids can do that with a straightforward structure: they are fixed in place, with no wheels, axles, or brakes to maintain.
The long contact surfaces also spread the helicopter’s weight over a wider area than small feet would. That helps it rest securely on ordinary landing spots, though the ground still needs to be firm enough to support the aircraft.
What skids give up
Wheels make it easier to move an aircraft across the ground without lifting it. Skids do not roll, so a skid-equipped helicopter generally cannot taxi from a parking spot to a takeoff point under its own power. When it must be repositioned, crews can use handling equipment or, in suitable conditions, move it with a controlled hover.
That tradeoff is useful when ground travel is not part of the job. A helicopter that lands and departs from compact sites can avoid carrying a more elaborate wheeled system just to travel between places on the ground. The choice is less about skids being universally better than wheels and more about matching the landing gear to an aircraft that can rise straight up.
