And just one more thought...
Clive mentioned that the engine structural designers were probably the only ones calculating the component thrust and drag...you can be sure that is the very first thing they did...
In order to keep the engine together you have to know how much force is pulling in what direction...think about the burner and turbine interface...the burner is attached to the compressor...which is attached to the inlet duct...all of which are pulling forward with great force...and then you have the turbine making a drag force and pulling in the opposite direction...how strong do you make those bolts that hold things together...?...
So this stuff is more than just a curiosity...it is very real and that engine would have flown apart on the test stand if someone did not calculate all this in advance...
Regards,
Gordon.