A row has flared up between leading planemakers over the width of tourist-class seats on long-distance flights, setting the tone for a bitter confrontation at this month's Dubai Airshow. The dispute focuses on the width of seats provided on long-haul flights for economy passengers - not always the ones most courted by airlines, but whose allocated space holds the key to efficiency claims for the latest jets offered by Airbus and Boeing.
Airbus this week called for an industry standard that would provide for a seat at least 18 inches (46 cm) wide in economy cabins, but its US arch-rival Boeing says it should be for airlines to decide.
The dispute comes as planemakers vie to sell ever-larger versions of their twin-engined long-distance aircraft, with potentially record orders expected at the November 17-21 event.
How the back of the plane is laid out - particularly whether seating is 9 or 10 abreast - is central to the economic performance claims being made for new 'mini-jumbo' jet designs.
Boeing says its revamped "777X" will hold 406 people based on economy seats over 17 inches wide and set out 10 in each row.
Airbus says the competing version of its A350 will carry 350 people in 18-inch-wide economy seat laid out 9 abreast.
Plane giants often trade blows on technical matters through advertising in the trade press. Now, Airbus is appealing directly to the public ahead of the Dubai Airshow, where the 777X is expected to dominate with over 100 orders.
It recently previewed what may be the start of a new ad war by showing financiers a slide illustrating three people squashed together at a restaurant, titled "Would You Accept This?"