Quote:
Originally Posted by VikingGrandad
How does speed affect trim control in real life? For example, can a boat's trim be controlled just as well (in terms of accuracy and consistency) at 1kt as it can at 5kts?
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I'm not overly familiar with submarine operations, but I have plenty of evidence that surface ships have exactly that problem with their rudder. Ships turn tighter at full speed than they do at slower speeds. This would seem to be the opposite of cars and airplanes, and boats, all of which have wider turn radii at higher speeds. The seeming discrepancy comes about for the simple reason that ships cannot go fast enough to have that effect.
I'm pretty sure that subs of the WW2 variety need to be going at least 2 or 3 knots to get enough bite in the planes to maintain depth properly, which is problematic because it's not much faster than that when noise becomes a problem, as well as vibration causing problems for the periscope.