Módszerek összehasonlítása

	Lapátelem-impulzus-elmélet	Súly és egyensúly
Tudományterület	Repülés- és űrtechnika	Repülés- és űrtechnika
Módszercsalád	Process / pipeline	Process / pipeline
Keletkezés éve	1889	1940s
Megalkotó	William Froude, Heinrich Glauert	Aviation engineering
Típus	Analysis method	Analysis method
Alapmű	Froude, W. (1889). On the elementary relation between pitch, slip, and propulsive efficiency. Transactions of the Institution of Naval Architects, 30, 94–103.	Federal Aviation Administration (2017). Airplane Weight and Balance Control. Advisory Circular AC 23-8B-1C.
Alternatív nevek	BEM theory, rotor performance prediction, actuator disk method	W&B, center of gravity, CG analysis
Kapcsolódó	3	3
Összefoglaló	Blade element momentum theory (BEM) is a fundamental method for analyzing rotor performance by combining blade element aerodynamics with momentum conservation. Developed initially by Froude and refined by Glauert and Leishman, BEM decomposes a rotor into radial blade elements, computes local aerodynamic forces, and sums contributions to predict total thrust, torque, power, and efficiency. BEM is standard for helicopter, wind turbine, and propeller design.	Weight and balance analysis is the process of determining the total weight of an aircraft and the location of its center of gravity (CG) throughout its operational envelope. Essential for aircraft safety and performance, weight and balance ensures that the CG remains within allowable limits (forward and aft) to maintain stable flight and controllability. Regulatory certification requires comprehensive weight and balance documentation for every aircraft configuration.