- I found a most official source for the proper name: http://100.rolls-royce.com/products/view.jsp?id=450.
This page needs to be moved
Although the engine was developed by Northrop & R-R it is now solely an R-R product.
It should be moved, but I can't see a move button.
It Was The NG Intercooler NOT the WR-21
- "Engine, Turbine, and Power Transmission Equipment Manufacturing, Marine Engines & Turbines". Janes Navy International. August 2000. Retrieved 28 April 2016.
- "Putting the Type 45 propulsion problems in perspective". STRN. 3 February 2016. Retrieved 29 April 2016.