Thanks, OLd Smokey
I had bad feelings about this from the start for the question originates in the ATPL QB. Stripped of ambiguites it asked how SFC would vary if you adjusted power to maintain 300KTAS at different heights. I thought I could figure out all but the thrust/RPM factor so that was what I asked for.
I think the examiner had in mind a basic set of circumstances that avoided Mcrit and Vmd, sticking to the middle troposphere. Otherwise I dont see how an answer could have been derived without considering specific aircraft and engines.
Anyway, I have enough to chew over now, and thanks again
Dick
Last edited by Dick Whittingham; 27th Nov 2009 at 16:02.