Quote:
Originally Posted by redpoint5
Wouldn't the main prop in this design be more efficient if enclosed in a shroud? Why don't prop planes have shrouds?
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A venturi shroud can double the static thrust of a propeller, but the faster it travels the less the effect and the more drag from the shroud. Basically the advantage negates itself once it's moving fast enough through the air, but VTOL craft (like quadcopters) need lots of static thrust so shrouds can help.