In the past I've cruised across the Pond at M.88 indicated, but such things are no longer permitted. Cruising for optimum payload availability is the holy grail nowadays - and Mno is .866 indicated.
I'm authorised to take the old ladies briefly up to over .9 IMN on air tests, but I recover long before Mne of .94 IMN is reached - and they certainly won't do that in level flight! As for M1.2....err, no. Not possible!
Last edited by BEagle; 1st Apr 2002 at 19:18.