Hi Jim.
I read your post with interest but I feel that the weight of the wreck - not just the 30,000 odd tons of bow section but also the weight of the water inside it - would have been too great in freefall for the variations in specific gravity, water temperature and deep or intermediate currents to have any great effect on the descent of the heavier items of the entire wreck. However I have no problem in agreeing with the above variations effecting the fall of the lighter items of debris, including the victim’s bodies.
In regard to the angle of the bow section at the moment she left the surface, as discussed in previous posts, after sinking a 1/400 scale weighted model, I found that the bow would have been at an angle of not much more than 14 degrees, very close to the 12 degrees proposed by Harland and Wolff, before she broke. In this scenario the rudder would have only just emerged from the water as survivors attested, and therefore the stern section really did simply “settle back a little” after the “explosion” before it stood upright and hurtled towards the bottom.
Incidentally, isn’t it curious that practically all the survivors spoke of an explosion before she went down, but not one of them recalled how dazzlingly bright that explosion was. Not one said how their night sight was effected by the sudden blinding light of it and no-one on
Carpathia or even Mount Temple reported any such event. Clearly the “explosion” was the sound of the ship tearing herself apart, nothing more, nothing less.
Also, one of the surviving engineers from the boiler rooms said he saw the engines fall forward from his vantage point on a lifeboat. This most likely gave birth to the myth of the boilers falling through the hull before she sank. However, now that we know Titanic sank in three main parts, it is fascinating to know we have an eye witness who saw it happen, with the forward engine cylinders on the seabed as proof. A thorough reappraisal of his testimony may give us new clues in just how the hell a vast section of the hull could simply fall away from the broken forward and aft sections.
Anyway, back to the model. I found that the moment the bow had broken off it instantly descended straight down. Admittedly my little experiment only took place in 3 feet of water so although it could not show how the bow and stern behaved all the way to the bottom, it did give an insightful indication of what most likely occurred at the surface.
In time I want to amend the model to make it break into the three main sections - God knows how or when - but that's the plan.
It’s all fascinating stuff!
Cheers, Rich