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![](https://pinterest.com/pin/create/button/?url=https%3A%2F%2Fwww.homemadetools.net%2Fforum%2Fshowthread.php%3Fp%3D213449%23post213449&media=https%3A%2F%2Fs3.amazonaws.com%2Fhmt-newsletter%2Fhmt_avatar_200.jpg&description=Frigate Going from Full Ahead to Emergency Stop - GIF by motorhead - the shafts on these types of ships rarely change direction. What does change is the pitch of the propellor blades. This is what enables the reduction in speed to be done with less possibility of damage. Back in my steaming days it was done by reversing the direction of the steam turbine or the main diesel engines. This was often referred to as a "crash back.=" It was easy to break things and knocked loose everything t= "Pin It")
the shafts on these types of ships rarely change direction. What does change is the pitch of the propellor blades. This is what enables the reduction in speed to be done with less possibility of damage. Back in my steaming days it was done by reversing the direction of the steam turbine or the main diesel engines. This was often referred to as a "crash back." It was easy to break things and knocked loose everything that wasn't bolted down.
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