The boat's engine consists of a boiler and one or more exhaust tubes.

This engine consists of a small boiler, which is connected to an exhaust tube.

The expanding steam pushes some of the water in the exhaust tube, propelling the boat forward.

The steam bubble then condenses, creating a vacuum which draws water back in through the exhaust tube.

Since temperature and pressure are being evaluated, two different measurement tools are needed in the exhaust tube.

It actually has an exhaust tube from which only cold air (-20 Celsius) comes out.

A long thin spit of flame appeared from the jet's exhaust tube and the craft started to pick up speed.

He positions the car so as to aim at an exhaust tube through a classroom window.

But its exhaust tube was still jetting out a current of water with stunning force.

A prominent pair of 150 exhaust tubes were fitted.