Thread: Sub turn rates?
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Old 07-27-17, 05:44 PM   #9
yamato9
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Quote:
Originally Posted by shipkiller1 View Post
On a 688 (all flights), if you are at or above about 26kts, then we mostly use one (1) degree rudder to change course under normal operations. It takes about 60 secs to turn 180. The faster you go (at 1') the faster you turn. At a full or flank bell, use as much rudder as needed. At a full bell (26kts), and you throw the rudder over to 10' you would really wip the boat around... 180' turn in less than 30 sec.
Wow, sounds astonishing! I have some questions regarding this info.

Could it be expected some damage on submarine (rudder, hull bending, internal equipment) during full rudder turn at flank speed?

Regarding information about Alfa 40sec/180deg turn.
Do you think this is also stated for Alfa in similar turning procedure? Meaning flank speed and rudder is set to max degrees (lets say 1 degree rudder) which in same time provide good control and turn rate of submarine.

I just tested turn rates and speeds of some submarines and ships in Dangerous Waters - RA mod and i was stunned how DW accurately simulate this. Basically its completely in line with your information regarding turn rates of 688.

here are some results;

Submarine, time to turn 180deg in seconds (full rudder), (Flank Speed - Max speed in sustained turn)
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Los Angeles (Flt III), 22,5 sec (32kt - 27kt)

(on 26 kt it needs 27,5 sec to make 180 deg turn, which is close to your info. Sustained max speed is then 22kt)
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Sturgeon, 24 sec (25kt - 20kt)
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Akula II, 18 sec (35kt - 26/27kt)
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Alfa, 12 sec (43kt - 38kt)
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Skipjack, 19 sec (30kt - 26kt)
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Ohio, 37 sec (25kt - 23kt)
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Seawolf, 19,5 sec (35kt - 31kt)
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Seawolf (SSN 23), 20,5 sec (33kt - 29kt)
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Virginia, 25 sec (28kt - 23kt)
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Victor 1, 18,5 sec (33kt - 24kt)
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Victor 3, 20 sec (32kt - 24kt)
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Kilo, 30 sec (17kt - 15kt)
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Kilo Imp.Club, 25 sec (20kt - 17kt)
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Udaloy, 43 sec (30kt - 14/15kt)
(This show realistic loss of ship speed in tight turn)
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Last edited by yamato9; 07-27-17 at 06:48 PM.
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