The airlines have come up with a new answer to an old question: How many passengers can be squeezed into economy class? A lot more, it turns out, especially if an idea still in the early stage should catch on: standing-room-only ‘seats.’ Airbus has been quietly pitching the standing-room-only option to Asian carriers, though none have agreed to it yet. Passengers in the standing section would be propped against a padded backboard, held in place with a harness, according to experts who have seen a proposal. But even short of that option, carriers have been slipping another row or two of seats into coach by exploiting stronger, lighter materials developed by seat manufacturers that allow for slimmer seatbacks. The thinner seats theoretically could be used to give passengers more legroom but, in practice, the airlines have been keeping the amount of space between rows the same, to accommodate additional rows. The result is an additional 6 seats on a typical Boeing 737, for a total of 156, and as many as 12 new seats on a Boeing 757, for a total of 200. That such things are even being considered is a result of several […]