Not commenting on this thread specifically but just to Nigel Osborne and purely out of curiosity.
I called one of the manufacturers a few years ago because their new model had no fuel flow figures or graphs like the old one did and they pointed out to me that they are not required to put them in the manual so they don't anymore.
The engine manufacturers are the ones who give the fuel vs Atmospherics and power setting graphs in their documentation and I can't see that changing at all in this case. There will (in almost every case) be a drag penalty to pay resulting in increased power setting and increase fuel flow, but if the airframe manufacturer doesn't need to publish it how can it be illegal in that context anyway ?
I am talking about an aircraft manufactured and approved in the US.
Last edited by VeeAny; 28th July 2009 at 15:01.
Reason: Added context comment.