Icelord and others: May, I ask...is there other occations when something like this have happened with submarines from kockums? Does it seems to be a "typical" outcome of the projecs when kokums is involved? I dont have much knowledge about submarines and kockums. I just say - it seems like our (swedish navy) submarines have served us well.
Not quite sure what you are referring to, do you mean how Collins came out initially?
If that is what you are referring to, then I would guess no, or at least, no more problems than usual for a new sub design.
As Tas mentioned, GF could explain it quite a bit better, but Collins was different than previous Kockums/Swedish designs in a number of areas. For example, the Collins SSK has a displacement of roughly twice that of the Gotland SSK and nearly three times that of the previous Vastergotland, Nacken and Sjoormen classes. While the physical dimensions where not so much greater, the increased displacement I expect cause the vessel to perform differently than the Kockums designers had expected based on previous experience. Also, the area where the Royal Swedish Navy operates is quite different, and less varied, than where a RAN submarine could potentially be found. Given a less varied environment, certain conditions might have been assumed which would not necessarily be the case operationally for the RAN.
Given these potential design issues, as well as where new tech (of which I do not know, can only guess) being introduced and quality control issues combined to have the Collins-class less effective initially, then originally intended. Given additional development in Australia as well as input from the US, the Collins AFAIK has met and/or exceeded original specifications.
-Cheers