ballonets

She trimmed the ballonets, trying to slow their rate of descent.

Time Scout Asprin, Robert 1995

Margo trimmed their attitude by adjusting the amount of ordinary air contained in ballonets inside the hydrogen bag.

Time Scout Asprin, Robert 1995

They opened every release valve on the gas bag and deflated it slowly then trod on the ballonets to help deflate them as well.

Time Scout Asprin, Robert 1995

This is the automatic operation of the safety valve on the gas-bag directly by the air ballonets.

Aeroplanes and Dirigibles of War Frederick Arthur Ambrose Talbot

Self-contained blowers contribute to the preservation of the shape of the envelope, the blowers and the ballonets being under the control of the pilot.

Aeroplanes and Dirigibles of War Frederick Arthur Ambrose Talbot

The lifting part of the airship comprises a single gas bag fitted with two ballonets provided to ensure the requisite gas-tension in the main envelope, while at the same time permitting, in times of emergency,

Aeroplanes and Dirigibles of War Frederick Arthur Ambrose Talbot

If these ballonets empty owing to the pressure of the gas within the envelope, a rope system disposed within the balloon and connecting the ballonets and the gas-valve at the top is stretched taut, thereby opening the gas-valve.

Aeroplanes and Dirigibles of War Frederick Arthur Ambrose Talbot

The ballonets are empty, and remain so throughout the ascent.

British Airships, Past, Present, and Future George Whale

This is effected by the manipulation of the air-ballonets, one of which is placed at the prow and stem of the gas bag respectively.

Aeroplanes and Dirigibles of War Frederick Arthur Ambrose Talbot

In this manner the gas-pressure becomes reduced until the ballonets are enabled to exercise their intended function.

Aeroplanes and Dirigibles of War Frederick Arthur Ambrose Talbot