A 250-seat jet is being built with four aisles instead of one. The reason is the shape: when you blend wings directly into a body wide enough to hold a small apartment, a single corridor down the middle no longer makes any sense

As aircraft bodies grow wider and flatter, the traditional single-aisle layout becomes a relic—forcing designers to reimagine what the inside of a plane should actually look like. The post A 250-seat jet is being built with four aisles instead of one. The reason is the shape: when you blend wings directly into a body wide enough to hold a small apartment, a single corridor down the middle no…