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can ducted propeller produce twice lift compared to opened propeller ? Answered

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 ?

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user
rickharris (author)2017-05-15

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

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user
iceng (author)2017-05-13

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...

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user
iceng (author)iceng2017-05-13

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

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