Issues with WR-21 and IFEP on T45

All About The British Royal Navy: Past, Present And Future
Joined: March 1st, 2005, 3:53 pm

May 5th, 2018, 1:56 am #171

Naval gas turbines have always been a "major repair by replacement" item at the ship level, with only minor repairs being conducted with the GT installed in the ship.

This has always required a number of "spares" to be in inventory to provide those replacements, and to cover extended maintenance times if parts are slow to arrive or the repair is more-involved than originally assessed to be.

All that comment means is that Defender's GTs were replaced with ones from the "spares" stock, probably by ones with "fixes" applied.


An example of the procedure:
http://www.navy-marine.forces.gc.ca/en/ ... f/hr0e3ova

The first pic is of HMCS Toronto's General Electric LM2500 that was replaced in-port in the Persian Gulf at the end of 2013.
 The second is one of the Speys of HMS Westminster being removed in late 2012.
HMCS Toronto gas turbine replacement in the persian gulf Dec 2013.jpg
changing the Spey on a T23.jpg
There it is... the District of Columbia! You will never find a more wretched hive of scum and villainy. We must be cautious.
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Joined: June 22nd, 2008, 8:08 pm

May 5th, 2018, 2:42 pm #172

Cheers bager, that all makes sense.  The issue I have though is that I'm pretty sure I read somewhere that the RN only ever acquired 12 WR21s.  Does sound a bit counter-intuitive so maybe it's simply not the case.
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Joined: July 16th, 2015, 9:17 pm

May 5th, 2018, 3:31 pm #173

Bager doesn't know any more than you about Defender's GT's. He's just speculating.
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Joined: October 7th, 2009, 4:39 am

May 5th, 2018, 10:39 pm #174

While he may be speculating about what was actually done on this case, he is correct about the way in which GT engines are managed.

I don’t know how many engines the RN bought, or what the details of the support contracts may be, but if you are going to use GTs you must have access to spares as they will, at some point, break unexpectedly due to FOD or some other cause, never mind the need for routine oprating hour based replacement and, having been using them for more than 50 years, the RN knows this well.
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Joined: March 16th, 2017, 8:22 pm

May 16th, 2018, 7:11 pm #175

Has anyone put out a definitive list of the changes in the Defender refit?
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