What is a typical value for the bypass ratio of the most modern engines?

Answer 1

The bypass ratio of modern engines varies depending on the type of engine and its intended application. However, for many modern commercial jet engines, a typical value for the bypass ratio is around 8:1 to 10:1. This means that for every 1 unit of air that passes through the engine core and generates thrust, approximately 8 to 10 units of air bypass the core and contribute to the overall propulsion of the aircraft. It's important to note that these values can differ significantly between different aircraft models and engine designs.