The drumbeat for a new Boeing midsize jetliner is growing louder. But beyond the idea of a new aircraft, things get complicated. The 797’s twin-aisle configuration is the big issue.

For the Lockheed/Korea Aerospace Industries team, the advantage is in not having to bury any serious development costs in the bid price.

Airbus and Boeing guidance, until recently, indicated that they expect a 17-year supercycle, but the end came after 12 as the world economy slows.