Quote:
Originally Posted by Osmium Steele
Perfectly normal depending on sea state. 16 kn is correct for glassy seas, 12 - 13 is right for heavier seas.
The XXI is faster submerged than surfaced. At every bell, iirc.
The XXI was designed with a whole slough of advancements over previous designs, surfaced speed wasn't one of them.
And, as Fubar mentioned, charging the batteries slows the boat a bit.
|
Thank you but I already know this.
Quote:
Originally Posted by Magic1111
|
From the wiki:
Quote:
Speed:Surfaced:
15.6 kn (28.9 km/h) (diesel)
17.9 kn (33.2 km/h) (electric)
Submerged:
17.2 kn (31.9 km/h) (electric)
6.1 kn (11.3 km/h) (silent running motors)
|
That still does not explain why when resurfacing speed will not return to 16 knts.