The Quanum series of carbon fiber propellers have been specially designed for multi-rotors and are manufactured to very exacting standards. They are extremely light and strong and you can expect an increase in performance due to their ultra thin and stiff carbon construction.
These propellers are specifically designed for multirotors with "pancake" style motors.The design of these blades is such that the lift produced by these blades is as evenly spread as possible from hub to tip.
These are also T style propellers which have dual mountings which means you can either use the standard 4mm center hole (which can be reamered for larger shafts) or you can use a tightening cover with 12mm centers and M3 bolts.
Length: 15 inch
Pitch: 5.5 inch
Shaft Diameter: 4mm
Cover Plate Hole Centers: 12mm
Hub Thickness: 3.5mm
Weight: 16g each
Rotation: Clockwise and counterclockwise
Unit Weight (g):
bought 10propelers 3 of them was perfectly balanced and really great, but 2 of them was with holes not in the middle, so it was impossible them to balance ;/ the rest was balancable, so after few hours works as it should :)) so buy 1-2 pairs more, than you need :) Also I bought 16" the same kind, and all of them was perfect! :) so it's lottery ;DI bought these props and received them 2 days later. (I live in Singapore, that's why, don't be jealous :) )
I haven't tried them yet, just put on my prop balancer. And, indeed, the balance is pretty good for all of them (8 pieces)
they are extraordinary light (and consequently ... Fragile) I expect a dramatically increase of my flight time. FYI : motor Turnigy 490KV 22 poles and Batteries 4S from 3300 to 6200 mAh.
I will update my review when I fly with these good looking propellers.