The 1-11 518 srs. for Court Line had a fixed droop to the leading edge which was developed to allow max weight ops from Luton. Most others after this had the same. Not sure if earlier A/C were modified though.
There were also plans to re-engine the 1-11 with Tays and JT8s but, with the exception of the Dee Howard aircraft, came to nothing.
More wing improvements were trialed on "YD" as the 670 srs.
Last edited by dixi188; 19th Feb 2017 at 07:02.
Reason: more