E-Props propellers have been around for a while now, but has recently hit high levels of popularity due to it's automatic constant speed effect. But ask 3 pilots how it works, and you get 4 different explanations. While the exact workings is proprietary information, I share what I have found after months of research. Follow me on Instagram: ----Image attribution----- E-PROPS DURANDAL 80 S-author Anubis2202 ( ) cropped + zoomed, overlaid text & arrows Dowty R391 Advanced Propeller System-author Sanjay Acharya ( ) croped + zoomed Propeller diagram-author nydano ( ) no changes Cessna T182T Cockpit-author Stahlkocher ( ) cropped + arrow overlaid G-DEEZ Denney Kitfox ( ) cropped propeller from plane, arrows overlaid ----Video attribution----- Crazy STOL Action at EAA Oshkosh 2022 by RRiner ( ), license CC-BY Chapters: 0:00 What is an E-Props Propeller? 0:34 Disclaimer 1:00 Prop Angle of Attack Basics (Don't Skip) 4:59 Extended Speed Range (ESR) 6:58 Alternative Way to Achieve ESR 13:26 Further Extending Speed Range