Ducted Fan blades
Ducted Fan blades
(OP)
We are currently working on a ducted fan design and had a quick question. So far we are setting our sites on a 36 inch four bladed fan inside of a 40-50 duct. Our current question is, would it be any benefit to set a second fan inside the duct behind the first one? Or is this just a waste?





RE: Ducted Fan blades
If one fan "does the job", why bother with the expense, weight, etc. of 2nd fan.
If 1st fan is running near stall, then you can unload it (move away from stall) by adding a 2nd stage. Usually, you would add a stator stage between the fans, to de-swirl the flow (or counter-rotate the 2nd fan).
RE: Ducted Fan blades
RE: Ducted Fan blades
~VTOLaeronautics