Originally Posted by A and C
after all things like B707 fuel planning are hardly appropriate for flying a Pa28 or TB20!
This is a continuing myth. Although there is plenty of irrelevant stuff in the IR writtens, the flight planning exams for the IR alone only refer to the "SEP1" and "MEP1" aircraft types. You haven't had to do any flight planning questions related to the MRJT (Medium Range Jet Transport) generic aircraft for a number of years now.