Originally Posted by
Heathrow Harry
Ken,ken - most of those are towards the end of the alphabet - you'd seriously hope by the time they got to the "K" version they'd know what they were doing
"Most of those?" Interesting. I listed 30 different aircraft and you focused on the 5 that had a "K" suffix or higher.
And four of those are for F-15s which do NOT follow the usual alphabetical sequence, but denote the country that bought them. So yeah, the Saudi F-15s have an S suffix, but that does not mean they were the 19th derivative version.