Titanic's whistles stood a little over 4 feet. tall and were powered by steam. Three individual chambers, with diameters of 9 inches, 12 inches and 15 inches combined to create the powerful sounding ‘voice’ of the ship. (info from titanic-titanic.com) This is my rendition of the titanic's whistles, which went on the funnels of the titanic. It is widely believed that only the first two whistles would be functional, but there is no concrete proof of this. I was inspired by SavageMan's Titanic (I am not affiliated with him in any way) to make whistles that would fit, just remove the cockpit that is on the middle whistle's bell (the long part), you would also have to add the piping to the front of the funnels on his titanic first. I attempted to make them as close to the real ones as I could including correct weight (750 Pounds) and a color match to the real ones. A set of Titanic's whistles were recovered from her wreck in 1993. The whistles were then restored and sounded in 1999, though using compressed air as the damage the whistles took from being under great pressure at the bottom of the ocean for 71 years would make using steam likely to permanently damage or destroy the whistles. I decided to not add anything to allow it to actually make steam, in order to allow you to make it smoke how you'd like. In order to remove the fuel, go to the bottom piece that is connecting the rear bracket to the middle whistle, and edit how much fuel it has.
updated version: https://www.simpleplanes.com/a/u44ibn/Titanic-whistles-updated