Unlike previous classes of navy tugboats, the " Valiant " class employs z-drive propulsion units manufactured by Schottel.
32.
The chief engineer then unsuccessfully attempted to bring the propulsion unit to zero pitch using the pilothouse controls.
33.
A prototype hull was equipped with a propulsion unit and was tested at Rose Bay, New South Wales.
34.
The projectile consists of a shaped-charge warhead filled with Amatol / Syndril and a shaft including the propulsion unit.
35.
Two pilots manoeuvre the vehicle from the pilot compartment by operating one main propulsion unit and four tunnel thrusters.
36.
Keeper-class cutters are equipped with mechanical Z-drive azimuth thruster propulsion units instead of the standard propeller and rudder configuration.
37.
One is the storage of hydrogen on vehicles; another is the high cost of a mobile fuel-cell propulsion unit.
38.
In 2007, Howmet was renamed Alcoa Howmet as a division of the newly formed Alcoa Power and Propulsion unit.
39.
Two firings of the main propulsion unit in Earth orbit were required to send the spacecraft onto the interplanetary trajectory.
40.
These valves sent hydraulic oil to the control cylinders on the propulsion units, shifting the pitch setting of the units.
