You are a little confused. S61 can run for 2 hrs with some oil still in the sump, using the emergency pump. So can the 225.
I am not confused. What you don't seem to understand, or neglected to grasp from my previous post, is that the S61 has a SEPARATE sump DEDICATED to the ELS. So as mentioned by droopystop, baring a hole from a gunshot, if the oil from the main sump is pumped overboard for any reason, there will always be oil available to the ELS.
the 225 is 30 mins.
So which is it? 2 hours or 30 mins.........I wonder now who is confused?
What most people are missing here is the fact that the ELS on the S61 only supplies oil to the babbitt bearings. the MGB itself has true run dry capability, not so in your beloved "new technology" 225.
I just fail to see how you consider a seperate glycol system which is subject to failure and a seperate ELS oil system also subject to failure, to be progress.
Progress to me would be, as in the 139, true run-dry capability, not requiring any input from another system or the crew.