New answers tagged

2

A propeller is better. Just look at any pylon race model to see what they use. DKNguyen put it very nicely: A duct doesn't beat a larger prop, it only helps make up for a smaller one. You're right that "EDFs induce a greater delta V on the air they move" but EDF models generally use twice as much power as a similar aircraft with a prop. Moving ...


3

As a rule of thumb, use fully turbulent flow at the elevated speed of the propeller wake on all surfaces wetted by it. The speed increase will result in higher friction drag compared to the propeller-free case and results in a drag increase that looks about right. A very interesting paper on the efficiency of an installed propeller can be found here. By ...


Top 50 recent answers are included