From a new range of fans from WQ. Well made and nicely balanced.

Housing inner: 70mm, 2.72in

Housing outer: 74mm, 2.91in

Rotor Diameter: 68mm 5 Blade

Max Current: 90A

Normal use Current: 55A

ESC required : 80Amp ESC

Battery LiPo required : Above 11.1V 2200mAh

Max efficiency:1.8 g/w *

Fan Weight: 55g

Approximate Motor Weight: 165g

Approx Fan & Motor Weight Combined: 220g

Recommended Motor: 2846/4300KV

*Note: efficiency meaning Input power can be generated for each watt can output much thrust. Give an example, like input 500w can be generated for output 800g thrust. efficiency is 1.6g/w.

Warning : Do not use the hand to test EDF. This should be common sense and not need saying.