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Stiebler · 08-07-20, 10:55 AM

No submarine from World War II could 'hover' underwater, with engines at zero, or even set to very low speed ahead. Tides and currents would cause it to rise or sink according to local conditions. The hydroplanes were used to control depth, and they required a certain forward velocity.

So the question is: for realism, do you provide a slow-sinking model for the U-boat, or a slow-rising model?

Realism requires that the U-boat have a slight negative buoyancy (tendency to sink), especially when at periscope depth, because the consequence of the U-boat rising slowly out of the water during an attack on a convoy might be very serious indeed!

At deep depths, slow sinking would also occur due to constant slight leakage of water into the boat, causing a downward motion.

So that is the NYGM model - slow sinking at all depths at low speeds (2 knots or below).

Der Teddy Bar introduced the first slow-sinking model for NYGM, but the Stiebler hard-code fix makes a more certain effect, sinking at a fairly steady rate.

I hope that helps,
Stiebler.

08-07-20, 10:55 AM	#5
Stiebler Fuel Supplier Join Date: Oct 2005 Location: London, UK Posts: 1,237 Downloads: 29 Uploads: 4	Slow-sinking effect in NYGM No submarine from World War II could 'hover' underwater, with engines at zero, or even set to very low speed ahead. Tides and currents would cause it to rise or sink according to local conditions. The hydroplanes were used to control depth, and they required a certain forward velocity. So the question is: for realism, do you provide a slow-sinking model for the U-boat, or a slow-rising model? Realism requires that the U-boat have a slight negative buoyancy (tendency to sink), especially when at periscope depth, because the consequence of the U-boat rising slowly out of the water during an attack on a convoy might be very serious indeed! At deep depths, slow sinking would also occur due to constant slight leakage of water into the boat, causing a downward motion. So that is the NYGM model - slow sinking at all depths at low speeds (2 knots or below). Der Teddy Bar introduced the first slow-sinking model for NYGM, but the Stiebler hard-code fix makes a more certain effect, sinking at a fairly steady rate. I hope that helps, Stiebler. __________________ NYGM Tonnage War Mod - More than a mod: it's an experience!