Boeing engineers improved the Wi-Fi signal in the cabin of their aircraft with 9 tons of potatoes. Numerous bags of tubers replaced human volunteers in testing signal strength. Potatoes showed the ability to quite well imitate the physical interaction of the human body with electronic signals (not to mention the fact that potatoes are not insane if you keep them locked up in an aircraft for days).
Recently, Boeing experts conducted regular tests of the stability of the Wi-Fi signal inside the aircraft. Curiously, for the experiments did not need to rise into the air and seat people throughout the cabin. Employees "Boeing" took off the car and filled it ... with sacks of potatoes. As it turned out, the potato creates approximately the same pattern of interaction with radio waves as the plane filled with passengers.