##  [Breguet Range Equation](/breguet-range-equation) 

  ##  [Breguet Range Equation](https://engineering.quantumdictionary.io/breguet-range-equation-0) 

  

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**Engineering & Applied Technologies Dictionary**

 







 

 

 

 



 

 

 

 

Definition

An analytical relation estimating cruise range R for a jet‑propelled aircraft under steady cruise by R = (V/c)·(L/D)·ln(Wi/Wf), where V is cruise speed, c is propulsion specific fuel consumption (fuel weight flow per unit thrust or power depending on formulation), L/D is lift‑to‑drag ratio, and Wi/Wf is initial-to‑final weight ratio.