For my Turbofan project I need to found a large fan, with smallest hub as possible.
Outside diam of 150 mm or more.
Small hub diam of 30-40 mm will be helpfull ( no motor backside )
Could be in carbon composite or 7075 aluminum, one part or assembled.
RPM 40.000 - 50.000
Someone can help me please?
Marco

Any luck Marco?

I doubt you will find a fan that size with a 30-40mm hub, its just too small to be strong enough for a rotor 5 inches or more. My Extreme Alloy 127mm fan is a 5" fan, rotor hub is around 57mm and that's about as small as you can go, also your RPM goal is way too high, my fan runs at 27,000rpm on 14 cells at 7.7Kw and pushes over 22lb thrust at this power level. Motor is 50mm diameter inrunner and is very efficient in the combination.

Marco, is this what you are looking for: http://www.hobbyking.com/hobbyking/s..._Fan_Unit.html

What you just posted Bill is a 90mm fan, he is looking for a 5 inch plus fan. What you posted is also a cheap knockoff and is quite dangerous at anything more than moderate power levels. The blades are a cheap carbon plastic and they explode if run too hard.

Extreme_RC, what is out there for large high quality fans? Where would you go to find one? I am interested myself for a similar reason. Thanks in advance.

My 127mm CNC alloy housing fan is one of the most powerful around, and cost when converted to USD is very affordable for what you get.
http://www.extremerc.com.au/estore/i...oducts_id=1218

Will run on 12-14s and has been run in the Jet Teng VIPERJET on 14s clocked at over 170mph, in the Jet Teng XXX sports jet on 12s at 170mph.