![The British ocean liner RMS Mauretania dry-docked in Liverpool c.1909. Note the mix of 3 & 4-bladed propellers, the latter being fitted to increase efficiency & reduce vibrations. : r/HumanForScale The British ocean liner RMS Mauretania dry-docked in Liverpool c.1909. Note the mix of 3 & 4-bladed propellers, the latter being fitted to increase efficiency & reduce vibrations. : r/HumanForScale](https://i.redd.it/bc670y73zn081.jpg)
The British ocean liner RMS Mauretania dry-docked in Liverpool c.1909. Note the mix of 3 & 4-bladed propellers, the latter being fitted to increase efficiency & reduce vibrations. : r/HumanForScale
![The largest ship propeller in the world is 31 feet in diameter. The Maersk Triple E class ships have 2 of them. : r/submechanophobia The largest ship propeller in the world is 31 feet in diameter. The Maersk Triple E class ships have 2 of them. : r/submechanophobia](https://i.redd.it/hquuimxi3hd21.jpg)
The largest ship propeller in the world is 31 feet in diameter. The Maersk Triple E class ships have 2 of them. : r/submechanophobia
![The new Oceanliner Designs video shows the “Notice” signs warning about the propellers as being black with white text. Is there new research that suggests these were, in fact, not red? : The new Oceanliner Designs video shows the “Notice” signs warning about the propellers as being black with white text. Is there new research that suggests these were, in fact, not red? :](https://i.redd.it/ti9aoo31bokb1.jpg)