What is zfil?

zfil stands for Zero Fuel Load (or Zero Fuel Lift), and it is both a flying technique and an engineering concept used in the aerospace industry. The concept of flying without fuel eliminates the need to carry and consume fuel during flight, which results in a significant weight reduction. This weight reduction can greatly impact the performance of an aircraft as well as its energy efficiency.

The crux of ZFIL involves eliminating, or minimizing, the need for fuel to perform aircraft operations or to achieve a desired altitude. This is typically done through a combination of aerodynamics, gliding principles, recouped energy from the exhaust stream, and in some cases, the burning of onboard hydrogen fuel cells. Many commercial airplanes employ version of ZFIL today, most notably those manufactured by Boeing, Airbus, and McDonnell Douglas.

In terms of its application for aircrafts, ZFIL involves limiting or eliminating the amount of drag on an aircraft by moving it through the air in such a way that eliminates wind resistance as much as possible. This can be done by increasing lift through altering air flow patterns generated by wings or spoilers. By doing so, less lift required by thrust is needed to keep an aircraft balanced during flight. Additionally, since these techniques reduce drag on an airplane they result in reduced energy consumption while still allowing an aircraft to fly at its desired speeds or altitudes.

One notable example of ZFIL being used was when the Solar Impulse 2 set off on its record-breaking journey around the world powered solely by solar energy back 2015-16; this included keeping the craft airborne with no fuel whatsoever throughout both day and night sectors! This would not have been possible without effectiveness of ZFIL principles employed along with innovative engineering solutions powering their lightweight aircraft with clean solar energy only while in flight mode.