Can an aircraft take off with frost, ice, or snow on critical surfaces?

Taking off with frost, ice, or snow on critical surfaces of an aircraft is not safe. Critical surfaces include areas such as wings and control surfaces where aerodynamic performance is vital for safe flight. The presence of frost, ice, or snow can significantly degrade an aircraft's ability to generate lift and control, leading to potential hazards such as reduced performance during takeoff, increased stall speed, and impaired control surface effectiveness.

In aviation, safety is paramount, and the risks associated with takeoff in these conditions heavily outweigh any potential benefits. Standard operating procedures and regulations are in place to ensure that airplanes are free of frost, ice, and snow prior to takeoff to maintain safe operational standards. This approach helps prevent accidents and ensures that the aircraft can perform as expected in critical phases of flight.

Thus, performing a takeoff with any contamination from frost, ice, or snow is strictly against safety protocols, making the notion of it being safe false.