4 ms·

Well, at least the front hasn't fallen off. The LCS-2 had problems like aggressive galvanic corrosion between the aluminum hull and steel propulsion system due

Well, at least the front hasn't fallen off. The LCS-2 had problems like aggressive galvanic corrosion between the aluminum hull and steel propulsion system due to inadaquate isolation. Any small boat owner could have told you that dissimilar metals and salt water are a bad mix unless you use sacrificial anodes and take measures to eliminate current flow. Yet the USN botched it.

vonmoltke 7y ago
I can't believe they went for an aluminum hull after the Royal Navy's disastrous experience with the Type 21 frigates.
- Gibbon1 7y ago
  Not to mention the USS Stark where the aluminum superstructure caught fire after being hit by a dud Exocet.
- scottlocklin 7y ago
  Better hope nobody drops a zinc penny in the bilge.
  - qtplatypus 7y ago
    After a bit of research I was a little confused. According to my research you can use sink as a sacrificial anode for Al depending on the exact alloy you are using.
    - scottlocklin 7y ago
      Owners of aluminum boats make guests empty their pockets of loose change, because a penny in the bilge of an aluminum boat will punch a hole in the hull. I did make a mistake; has to be an old style copper penny for maximum galvanic corrosion. It's a fairly lousy material for boats, though people use it anyway.
deleted 7y ago
[deleted]
frankharv 7y ago
I too have knowledge of these issues and they are devastating. On top of dissimilar metal issues there are also different aluminum grades involved in the construction. (meaning training+certs needed to work on these for most yards) So on top of zero survivability in a hostile env they are not going to last 15 years. Back when I was in, Ronnie wanted a 600 ship navy. Now we have <350 and that is counting these glorified ferrys.
filoeleven 7y ago
I really thought your comment was going to be a reference to this sketch. “The front fell off” is...not something one expects to be a realistic scenario. https://youtu.be/3m5qxZm_JqM https://youtu.be/3m5qxZm_JqM
- qtplatypus 7y ago
  The sketch is in reference to a real ship https://en.m.wikipedia.org/wiki/Kirki_(tanker) https://en.m.wikipedia.org/wiki/Kirki_(tanker) in which the bow split after it caught fire.
- liability 7y ago
  I padded it out with a bit more substance, but the first revision of my comment was just a reference to that sketch. Remembering the sketch reminded me of the LCS-2 hull issue.

vonmoltke 7y ago

I can't believe they went for an aluminum hull after the Royal Navy's disastrous experience with the Type 21 frigates.

Gibbon1 7y ago
Not to mention the USS Stark where the aluminum superstructure caught fire after being hit by a dud Exocet.
scottlocklin 7y ago
Better hope nobody drops a zinc penny in the bilge.
- qtplatypus 7y ago
  After a bit of research I was a little confused. According to my research you can use sink as a sacrificial anode for Al depending on the exact alloy you are using.
  - scottlocklin 7y ago
    Owners of aluminum boats make guests empty their pockets of loose change, because a penny in the bilge of an aluminum boat will punch a hole in the hull. I did make a mistake; has to be an old style copper penny for maximum galvanic corrosion. It's a fairly lousy material for boats, though people use it anyway.

deleted 7y ago

[deleted]

frankharv 7y ago

I too have knowledge of these issues and they are devastating. On top of dissimilar metal issues there are also different aluminum grades involved in the construction. (meaning training+certs needed to work on these for most yards) So on top of zero survivability in a hostile env they are not going to last 15 years. Back when I was in, Ronnie wanted a 600 ship navy. Now we have <350 and that is counting these glorified ferrys.

filoeleven 7y ago

I really thought your comment was going to be a reference to this sketch. “The front fell off” is...not something one expects to be a realistic scenario. https://youtu.be/3m5qxZm_JqM https://youtu.be/3m5qxZm_JqM

qtplatypus 7y ago
The sketch is in reference to a real ship https://en.m.wikipedia.org/wiki/Kirki_(tanker) https://en.m.wikipedia.org/wiki/Kirki_(tanker) in which the bow split after it caught fire.
liability 7y ago
I padded it out with a bit more substance, but the first revision of my comment was just a reference to that sketch. Remembering the sketch reminded me of the LCS-2 hull issue.