The autogiro stopped, almost in the center of the roof.

He had not even made a move to turn and watch the autogiro make its successful departure.

His course was toward the clearing where he had parked the autogiro.

If they had heard the autogiro, they could not see it.

An autogiro was outlined in the sky above the mansion.

The motor roared as the autogiro started across the roof.

Some aimed for the autogiro, which was spinning almost overhead.

A Lizard autogiro was growling through the air toward him.

They reached the autogiro, and listened there to distant sounds.

On the roof rested a strange machine - an autogiro.

Then the autogiro reached the end of its descent.

The autogiro was now completely camouflaged and out of sight.

His first job was to design a new two-cylinder motor to power the autogiro.

The autogiro quivered through the last twenty feet of the descent.

The motor of the autogiro had provided the sound effects for the decoy.

The Shadow was keeping close to the west bank, to pick a landing place from which he could return to his autogiro.

All the while, the wingless autogiro was hovering above the scene.

They had left the autogiro three miles back.

Unseen against the silent sky, the autogiro continued its sure descent.

The autogiro took off, leaving the blackness of the landing field beneath it.

That was the roar of an autogiro, ascending from the space beside the house.

In 1931 he made the first landing of an autogiro, now called a helicopter, on an aircraft carrier.

There was a long series of such autogiros, developing the rotary wing concept.

Red light showed a peculiar feature of the autogiro.

But the autogiro had reached the airport soon afterward.