09III/09IV (093/094) Nuclear Submarine Thread
- Thread starter SinoSoldier
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Pump jets are commonly used with certain kinds of commercial ships that require high maneuverability, shallow draft and waters. Ferries and cruise ships plying the Yangtze would likely use them.
One issue is that they are not as efficient as bare propellers in turning rotating power into linear thrust as bare propellers. When it comes to efficiency, its propellers > skewed propellers > ducted propellers or pump jets, while the order of noise generation and cavitation is the other way around.
This is an obvious reason why diesel electrics do not use pump jets. The Russians tried that with a Kilo and the results were unsatisfactory.
As for why the Chinese SSNs have not used this technology? Its obvious from here that the Chinese nuclear submarines do not have the power that the USN subs have, at least the ones that you have now, which are based on an aging platform. If they had incorporated pump jets, it would be at the sacrifice of other aspects in the sub's performance.
Its akin to like the early J-20 that do not have thrust vectors because of the lower power in the engines and the loss of thrust efficiency of the vectors, until later J-20s have more powerful engines.
Until Chinese subs gets a better power density off their nuclear reactor and steam turbines, only then you will see the pump jets.
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The latest Type 094A variant is commissioned as the 'Long March 18'.
According to this post, this is a new variant of the Type 094 class, but I cannot find the difference or changes.
According to this post, this is a new variant of the Type 094 class, but I cannot find the difference or changes.
Yes, 094 or 09IV and 093 or 09III.
