Guess you have missed something Basil - even the briefest Google search brings up multiple references about water-injection being used on some early 747s. For instance, a NASA paper on water-injection on Commercial Aircraft refers to it
"being used on Boeings first jet aircraft (the 707), and later on the largest commercial aircraft, (747-100 and 747-200 series fitted with JT9D-3AW and JT9D-7AW)"
Maybe "just in from the pub" is not the best time to post��
(You beat me to it CurtainTwitcher)
Last edited by farsouth; 23rd Sep 2016 at 09:41.