The pump-jet propulsion of a submarine has long been a secret, as various aspects of the submarine's parameters can be deduced from the structure of the propellers. Here are some close-ups of the Virginia submarine's pump-jet , and with these photos, you can even restore the thrusters to their true form. I guess the pump-jet thrusters of the Virginia class submarine will not be very different from those of the Seawolf class submarine, so the structure of the pump-jet of the Seawolf class submarine can also be inferred from these photos.
In these photos below you can clearly see the stator and rotor (propeller) of the PJ, with the rotor in the back and the stator in the front. The number of blades of the stator is uncertain, while the number of blades of the rotor (propeller) is 7.
The following picture may seem critical: by looking at the PJ you can even infer the number of blades of the stator. We can see the cover cloth covering the PJ, probably because of the wind, which makes the stator's blades protrude through the cover cloth.
The picture below is of the USS Connecticut, and my presumed propeller is not yet installed. By referring to USS Jimmy Carter's PJ, although the cover is covered, you can see that there is a "bulge" at the end of the cover, which is the end extension of the propeller, if there was nothing there, the cover would not be in this position, but would hang down by gravity.
USS Connecticut:
USS Jimmy Carter:
In summary: The Virginia class submarine has the rotor at the rear and the stator at the front. The number of rotor blades is 7, and the number of stator blades I guess is at least 10 or more, maybe 16 or 18, similar for the Seawolf class submarines.
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In these photos below you can clearly see the stator and rotor (propeller) of the PJ, with the rotor in the back and the stator in the front. The number of blades of the stator is uncertain, while the number of blades of the rotor (propeller) is 7.
The following picture may seem critical: by looking at the PJ you can even infer the number of blades of the stator. We can see the cover cloth covering the PJ, probably because of the wind, which makes the stator's blades protrude through the cover cloth.
The picture below is of the USS Connecticut, and my presumed propeller is not yet installed. By referring to USS Jimmy Carter's PJ, although the cover is covered, you can see that there is a "bulge" at the end of the cover, which is the end extension of the propeller, if there was nothing there, the cover would not be in this position, but would hang down by gravity.
USS Connecticut:
USS Jimmy Carter:
In summary: The Virginia class submarine has the rotor at the rear and the stator at the front. The number of rotor blades is 7, and the number of stator blades I guess is at least 10 or more, maybe 16 or 18, similar for the Seawolf class submarines.
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