P103. Although I was in Roy Boot's FPO, I was not on the P103 design team so can't really comment on it except that at one point I was asked to do the drag analysis and then the mission and point performance calculations. The supersonic drag analysis involved developing cross -sectional area plots resolved according to the Mach number and, in this case, there was magic involved in the way I dealt with the nacelles and associated stream tubes. I think this was also an opportunity to test several alternative drag models. In fact I was a great believer in applying as many methods as possible, particularly when the configuration deviated from conventional since that way would highlight possibly suspect methodologies. At the time it was the thing to hand calc these things and if the modelling was within 5 or 10% you knew you were ok. Oh, the days spent planimetering and punching numbers into the reverse Polish notation calculator.....and when all was ok, setting up the JCL, purging the company mainframe and running the calcs overnight. Later, and when they made the full size mock-up there was only enough room in the shed for a one-winged wonder. I never saw the nacelle tilt.
