Not all have a single level for passengers. Some of them have two passenger levels. Known as double-decker airplanes, they are bigger than traditional single-decker airplanes. Here are five facts about double-decker airplanes.
#1) Originated in the 1950s
Double-decker airplanes aren’t a new invention. They’ve been around for well over a half-century. The world’s first double-decker airplane, the Breguet Deux-Ponts, originated in 1953. Developed by Breguet Aviation, it features two separate levels for passengers. The bottom level supported 48 passengers, while the top level supported 59 passengers. The Breguet Deux-Ponts remained in service until March 31, 1971 when it was officially retired.
#2) The A380 and 747-8 Are the Most Popular
Among the most popular and well-known double-decker airplanes are the Airbus A380 and the Boeing 747-8. The A80 supports up to 853 passengers in an all-economy layout. As a result, it holds the title of being the world’s largest passenger airplane. The 747-8, on the other hand, supports up to 467 passengers in a standard three-class layout. Both types of aircraft are still in service and used by major commercial airplanes throughout the world.
#3) May Feature a Third Level for Cargo
Although their name may suggest otherwise, double-decker airplanes aren’t limited to two levels. Many of them feature three levels: two levels for passengers and a third level for cargo. The cargo level or “deck” may be below the passenger levels, or it may be above the passenger levels. Regardless of the location, this third level is typically used exclusively for cargo.
#4) Higher Operating Cost
Double-decker airplanes have a higher operating cost than their single-decker counterparts. With two levels for passengers, they weigh more than single-decker airplanes. At maximum takeoff weight (MTOW), for example, the A380 weighs over 1.2 million pounds. Therefore, it burns more fuel than smaller, lighter single-decker airplanes. And with two levels for passengers, double-decker airplanes are also more expensive to staff and maintain. They require larger crews and more challenging repairs and maintenance.
#5) Top Deck May Be Reserved for Premium Seating
In many double-decker airplanes, the top passenger deck is reserved for premium seating. Passengers with first-class or business-class tickets, for instance, will often sit in the top level, whereas passengers with economy-class tickets will often sit on the bottom level. This is because the lower deck is larger and holds more seats, whereas the top deck is usually smaller and holds fewer seats.
