Trying to figure out where this was. Book by a well-know aviation writer, showing the evolution of a "fast bomber" in slightly humorous form. Each picture shows the speed of the bomber. First pic is the perfectly clean bomber. Next, tail (and top?) turrets added, only knocks off about 10mph. Third pic has guns everywhere, speed still lower. Fourth pic adds EW antenna all over, another 10mph. The final speed it ~50mph slower than the original aircraft.
The point was that each modification could be justified by the very marginal speed loss, but the cumulative effect would have been rejected.
Anyone know where this appeared?