It's not so much "needed" as it is a physical consequence. The empty weight is the weight of the aircraft itself - without fuel, crew, passengers, cargo or weapons.
That depends on the weight and design of the aircraft.
The wings already support the entire weight of the aircraft and anything it is carrying. There are maximum limits to how much an aircraft can carry. The aircraft is designed to support this weight. No pilot would normally try and fly an overburdened aircraft.
15 gallons
18.4 gallons or 69.6515768 liters.
well i am a Prof and let me tell you i get this question ALOT an aircraft can fly at 5501 g if it has ALOT of DRAG 11253 percent
The weight of an aircraft counteracts the lift produced by an aircraft. The heavier an aircraft weighs the greater the lift needed to get off the ground.
1 cubic centimeter of neutron star stuff would weigh as much as 1000 aircraft carriers
This depends on various factors, including the type of aircraft being flown and its Maximum Takeoff Weight (MTOW), the aircraft's configuration, density of the air (more weight can be taken during the winter season versus summer due to the surface cold air being more dense), runway length versus needed roll to obtain lift on departure, runway length at landing point (Heavier the aircraft on landing, the greater the stopping distance needed), and how the weight is distributed throughout the aircraft.
This varies due to payload (how much weight is on the aircraft) and weather, V1 is normally around 152 KIAS and 164 when the aircraft begins to take off.
The lift force is the force acting against the aircraft's weight. For straight and level flight, lift acts in the upward vertical direction and the weight of the aircraft acts in the downward vertical direction. For level flight, lift = weight.
Gross weight (Empty weight) of the F-14 is 43,735 lb.