(Forgive me for citing a reference everybody here probably already knows, and that someone who frequents this forum may have written!)
The Wikipedia article on the FL-9 confirms that the late FL-9 had an 1800 hp rating, and that whereas the first batch had 567C engines the late batch (as one would expect, given their 1960 build date) had 567D1.
The Wikipedia article on the FL-9 confirms that the late FL-9 had an 1800 hp rating, and that whereas the first batch had 567C engines the late batch (as one would expect, given their 1960 build date) had 567D1.
