What is the umbra and penumbra? Why doesn't a flying airplane have an umbra and a penumbra?
Why doesn't a flying airplane have an umbra and a penumbra?
Why do some airplanes have low wings, and others have high wings? Why does aeroplane fly? What is the difference between a propeller plane and a jet? Why do some planes still use propeller engines, not jets? Why don’t planes have parachutes? Why are there no flying animals with four legs? Why don't airplanes have airbags? How does the wings of a aeroplane works? Why do planes not have airbags? What is a plane? What is an airplane? Why do propellers in airplanes rotate in opposite directions? Why do some planes have an exhaust in the back of the fuselage? What keeps an airplane in air? Why don't planes use massive parachutes? Why can't passenger aircraft be amphibian so they can land in water in an emergency? Why does the ATR 42 aircraft have its engines embedded into the wings unlike jets such as the 787 which has its engines hanging below the wings? Why don't commercial aircrafts have parachutes? Why can’t an airplane just fly into space? What is that plane like flying object flying really high leaving behind a trail of smoke? Are they cargo plane, passenger plane or some other kind of planes? How does an airplane fly? Why did aircraft stop using variable-sweep wings, like those on an F-14? Why astronauts have a white and an orange-coloured space suit? Why do astronauts have a white and an orange coloured space suit? Why are the MiG-21s known as the "flying coffins"? Why don't US airlines use Tupolev aircrafts? Can a plane fly with no engines? Why do Air Force, Navy and Marine Corps aircrafts have the same roundel? Why are bats the only flying mammal? Can a plane fly with only one wing?