Recent content by EvanJ

Yah i see what you mean. What is not being used is probably that way for a reason because i know I am probably not the first one to think of this idea. I may just make a small prototype and see what happens. It just frustrates me that if it has been tried and deemed unsuccessful, i wish i could...

I agree. centrifugal would not be a step in the right direction. But most ducted fans only have one blade. I'm trying to decide whether i could put in 4 blades (like in my sketch posted earlier) or if that would have to many problems, or i would not get power equal to one big propeller, and i...

Wow! those air straighteners work amazing! i will definitely consider that in my design. Also, I do realize that centrifugal fans produce more pressure, but they are bulky. Weight needs to be a minimum for a hang glider. I do not believe you can connect centrifugal fans in parallel and...

Ok. In this case there will be an engine, so power i do not believe will be a problem. but i do see the problem of turbulence. I found this website: old.greenheck.com/technical/files/engineering/04fall_eng.pdf which can help prove the general concept, but would adding 3 fans have triple the...

I have attached the reason to why I am asking all of these questions (ignore all the small labels). It is my concept for a powered hang glider harness. The design is still in its most primitive stages, but I do not want to continue with it if there are big issues to start with.

I have not gotten that far in my design unfortunately. That is also one other thing I am going to need to figure out. I'm trying to figure out whether multi-blade compressor type propellors, or 2,3, or 4 blade rc airplane propellers, or even fully custom propellers would work best. Its going to...

ok. so would there be a way to mathematically figure out the thrust of additional fans? basically what i am trying to accomplish, is how many small fans (propellers) connected in series in a tube (vaneaxial like), would create the same thrust as one bigger propeller. taken that each are moving...

Ok, I have a question I have been wondering about. If you have a tube and insert one fan into it. The fan turns to create a certain air displacement. If you put 2, or 3 etc. fans into the tube spinning at the same speed, would it displace more air? or would each fan simply move the air...