How is the biggest passenger airplane Boeing 777X tested. Part 2

Inside Flight Test 1 are many instruments and special equipment necessary for tests. One of the most important are reservoirs with water located in the front and tail parts of the airplane.

According to the words of engineer Edwin Navarro tanks help to move center of gravity of 777X that in necessary to analyze airplane stability. It is required for testing the airplane in certain conditions.

Behind the tanks are located few rows of the seats – approximately like in economy class. They are intended for Boeing personnel transportation between test flights. These seats give idea about how will the cabin of production 777X look like. The airplane is designed for ten seats in a row in economy class that allows to accommodate up to 426 passengers in two-class configuration – by 30 more than in 777-300ER.

High-density seating is common for current 777 but in 777X there is more place that is why passengers will fill more comfortable.

Configuration of the economy class is the same as in competing Airbus A350. For historical reasons engineers of the airplanes have installed per 9 seats in a row – rare airline companies placed orders for cabins with 10 seats in a row.

Nevertheless, Airbus works over denser cabin configuration that would allow to accommodate 10 passengers in economy class “without loss of the seat’s width”.

Boeing installed in 777X new windows. Boeing assures that they are located higher than in Airbus A350 and they are 29% bigger that makes airplane visually more spacious and of course gives better visibility to passengers. But for convenience of comparison one window is taken from Airbus A350.