What do they spray on planes so they don't freeze?
What do they spray on planes so they don't freeze? De-icing solution is a mixture of propylene glycol and water, heated to around 150 degrees, and sprayed under pressure to the wings of an aircraft. It's good for around 22 minutes so if there are delays in takeoff, another application might be needed.
Why do windows have to be open on takeoff?
If the airplane's interior is dark while its exterior is bright and sunny, passengers may struggle to quickly exit the airplane during an emergency. Therefore, airlines require passengers to open their window shades during takeoffs and landings to allow for eyesight adjustment.
Why are planes sprayed with water before takeoff?
It's not uncommon to see planes being sprayed before takeoff. The spray is a heated mixture of glycol and water. It has a lower freezing temperature than just water. This breaks off ice already formed and prevents more from building up.