Comments by "Rick2010100" (@Rick2010100) on "H I Sutton" channel.

  1. The two propeller design from Skunk Works is interesting, because two ship propellers allow them to run with a lower RPM. As the screw speed increases, it becomes very loud due to caviation. The cavitation at the outer propeller tips causes small gas explosions which can be easily detected by the sonar.
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  2. The larger size is caused by a vertical launch system (VLS) wich will be integrated in the Type-212CD. The 212A can currently only fire missiles from the torpedo tubes, the IDAS from Diehl Defence (IDAS Interactive Defence & Attack System for Submarines)
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