can ducted propeller produce twice lift compared to opened propeller ?

can ducted propeller produce twice lift compared to opened propeller ? for example if there is an opened propeller with low rpm producing some amount of lift. If we ducted that opened propeller and provide same rpm and power as opened propeller to it will it produce twice lift compared to opened propeller with same rpm and power ?

rickharris3 months ago

This is your second question that sounds like homework, I feel you should give us some background behind what your trying to do.

rickharris3 months ago

Why should it?

iceng3 months ago

Not twice but there are no tip vortices to waste energy

https://en.wikipedia.org/wiki/Ducted_propeller

https://en.wikipedia.org/wiki/Ducted_fan

Ducting works on wing tip vortices as well as the compressor jet engines.

http://uv-4stem.blogspot.com/2016/01/advantages-an...

WingVortices.jpeg
iceng iceng3 months ago

These air craft pictures may be of interest to you..

HellicopteerGENH4.jpghellicopterka-56.jpgBoujaillesFrance.jpg100_2167.JPG100_2165.JPG100_2149.JPG