The speed of an airplane is much greater than that of a helicopter.

They were rescued by helicopter.

They made the pilot fly the Navy helicopter.

He was transported to the hospital by helicopter.

Ships and helicopters left for the spacemen's rescue.

The government transported goods to the island by helicopter.

A helicopter is able to take off and land straight up and down.

The helicopter is so useful that someday it may take the place of cars and trains.

The helicopter is flying very low.

Tell those people to back off so that the helicopter can land.

The helicopter is hovering overhead.

A helicopter circled over us.

The helicopter hovered over the building.

The president is flying into town by helicopter.

The speed of an airplane is much greater than that of a helicopter.

It's easy to see the area's majestic topography from the cockpit of a helicopter.

The helicopter landed on the roof.

Is this the first time you've flown a helicopter?

I know how to fly a helicopter.

Mary waved her hand to the helicopter from the 4th floor of her home, in hopes of getting help.