Answer by Urquiola for What are the advantages and disadvantages of ducted...
R W Hovey indicates Ducted Fans are more efficient below 100-110 mph, with 80 % propulsion efficiency (percent of delivered mechanical power that is converted to thrust), above this, a free propeller...
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An answer to your question can be found here.Advantages of ducted fans would be:reduced noiseBetter containment of broken bladesprotection of ground personnel when the engine is runningSmaller size...
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What are the advantages and disadvantages of ducted fans in designs such as...
I have read that it increases thrust and reduces noise. Is there a downside to this?(Image source: Wikipedia)
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