Titanic's reciprocating engine running at between 72 to 75 rpm... 'Ahead Full'. The thrust block is essential to avoid the counter-thrust of the propeller which would lead to misalignment in the long run which would distort the crankshaft of the engine. It had to be well greased at all times and avoid overheating of the bearings and collars. Note: there's no steam piping into the engines in this render. Credit © Cian O'Reilly https://www.youtube.com/@titaniccor6502 https://www.artstation.com/art