Most buildings don’t fly – well, I suppose that somewhere there may be some that do – but for the most part our built environment tends to touch down in one place and stay there.  In contrast, airplanes carry large groups of people at high speed, hurtling through the air over great distances; and the design of a plane must overcome a host of messy, complicated issues relating to flight with which your house or office building will never contend. Modern airplanes, like modern buildings, are functional and getting the job done, but I think …