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Mexican navy tall ship slams into Brooklyn Bridge 1

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The ship was not moving in the video I posted. The intention was to show the lack of capability of the brake to dissipate energy.
 
Looked to me like he backed off the brake too much and the whole thing got momentum and couldn't be stopped. This brakes are a band which is a bit like a drum brake. Terrible heat dissipation.
 
Ran out of chain, because brakes could not stop ship.
They missed several opportunities to close the lock-stop when the anchor was stopped early on.
This was operator error or neglect.
The ship was not moving in the video I posted. The intention was to show the lack of capability of the brake to dissipate energy.
Okay. If the brake could not control only the weight of the chain and anchor, this is definitely an engineering design error.
 
I was able to find a video showing how hydraulics are used to change propeller pitch. It seemed rather complex by itself, and it failed to mention how two hydraulic hoses are attached to a rotating shaft. How is this done and is it failure prone?
 
I was able to find a video showing how hydraulics are used to change propeller pitch. It seemed rather complex by itself, and it failed to mention how two hydraulic hoses are attached to a rotating shaft. How is this done and is it failure prone?
I think this video/model does a good job of showing how the mechanical engineering works.

However, it does not address how the hydraulic fluid is inserted into rotating shaft.
 
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There is a babbitted sleeve that fits over the shaft with a groove for ahead and a groove for astern.
 

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