Sorry Aderezo for the smoking comment.  It was inappropriate -- I was just shocked you would make a claim and tell people to "(pick randomly 2 ss5s and make the test)".  This test was going to prove you absolutely wrong.  

Proof:  I gave you the times for the KM SS5 and IJN SS5.  If you don't believe the times, run the test yourself.  I did what you told us to do.  I'm not going to spend time on furthering your argument.  You are factually wrong.   

  Now, if you want to keep up this argument, you need to prove to the forum any two subs which have the same air time.   Understand, I can run the test on four different nation's subs-- so do a real test because I will double check your results.  You are the one who has made claims without any proof.  

I have played subs in Navyfield for over 4 years and have made significant additions in the forums -- I don't troll, I answer questions factually.  It is common knowledge with an experienced sub player that different subs have different air times.  I use this to my advantage when taking on a different nation's SS just like I take advantage of the longer torp range of IJN subs.  If you can be in an IJN sub and go under at roughly the same time, keep the other sub busy, and eventually he will surface before you and lose sonar contact.  Its a great fun tactic.  

It took me about 15 minutes to find this:

From Harry74 from a post dated 5/13/2012:

"There are differences between divetimes of subs from different nations at same tier (a few seconds). "

This is the link:
http://fm.en.kupaisky.com/Community/Forum/View.aspx?page=2&num=621&category=C01&searchType=2&searchValue=underwater&pageCount=0&sort=5&page1=1 


I'm sure there is more out there, but like I said before -- its not worth my time.  
Give us some proof if you want to keep up this argument.
Otherwise, just admit what you said was wrong and it was stupid to challenge someone to prove it. 

last time i  tested ijn ss4-km ss 4 were simultaneously surface(clan area test not test server)this is
changed since?

    I had a little time tonight, so ran a test with SS4s.  This is running the Test Mission with the Retired BBs.  I run a stop watch and record times from hitting the U key (to go under) until the red emergency light goes out (sub fully resurfaced) and then another time from when red light goes out until the air tanks are filled.  Listed in order of speeds:

US SS4
Underwater time:  191 secs
Resupply time: 103 secs
Planesman:  L74, Air Supply 1167, Exp 192, Vets 60

KM SS4
U: 192 secs
R: 70 sec
P: L97, A 1718, E 564, V 110

IJN SS4
U: 204 sec
R 65 sec
P: L107, A 1898,  E675, V116

Couple things to note.
     Faster the sub, less the air.
     With SS4, the IJN sub had 6.25% more air.  This is a bigger gap than with the SS5s.  Typically, the SS4s are faster than the SS5s (without accounting for engies).  
     The planesman did make significant difference to resupply time (we all knew this), though the two high level guys were pretty close.  I should do the exercise without planesman to see if the subs reload at the same rate.  Maybe I'll do this with SS1s.

    This is an interesting exercise and the more I look at forums, the more I realize people think each nation is the same.  As I have time, I may do other levels of subs.  

It was my pleasure Aderezo, sorry for the attitude at first.  God Bless -- I would love to get more info on other nations if anyone has the time.  This is how the old forums were -- some of the players had incredible amounts of information which they found scientifically.