Propellers, propellers, propellers ...

[bluuu]

I think RCTimers carbon props quality is randomely ... I bought 11x5 carbon 4 CW and 4 CCW and my rank is: 3 good, rest bad

[teramax]

with the Graupners i think you mean the e-Props than they are 10x5 not 10x4.5
Some are Tiger shaped, some not, could you please ad a collum to the table which of them are which shape?

Good work, thanks for that and agreed, the good old RCT 15x5.5 are still the best. Little weak but hey, never broke on in the air

edit: sorry seen now, TM stands for Tiger shaped

[leopold1]

The flyduino props, are they from gemfan?

[LPR]

Angel

You have tested many props and I'm wondering what you think is the difference between a good prop and a bad prop of the same model. Is it something you can see and fix or is it just too complicated to understand.

Larry

[Max]

I've tossed props for several reasons. Most common is that they simply won't balance properly -- if I have half a blade covered with tape and it's still not balanced, it's definitely trash. Sometimes the holes are just way off. My ideal prop will take almost no weight to balance, maybe just a touch on the hub (I use thick CA and kicker). Another common problem is tracking being off -- both blades not in the same plane when under load. I also check how it behaves at the transition point where the blades start to bite and lift up... some props are much smoother than others. And of course defects in the material/construction also happen.

Angel's ratio of good/bad sounds about right with what I've experienced (I've tried a lot but nothing high end like Tiger or Xoar), and I also agree that CW props tend to be much worse overall.

-Max

[afernan]

@teramax
Yes they are Graupner e-prop 10x5, as you said

@Leopold:
the flyduoino are these ones (gemfan "style")
http://flyduino.net/10x45-Carbon-reinfo ... -2CW-2-CCW

@Larry
Static calibration you can fix easily (under a certain limits) using a balancing tool. If too much Scotch tape have to be put, then it´s bad also.
Dynamic calibration depends on the blade shape so, it´s almost imposible (imposible for me).
And not, you can´t see the good/bad by "eye" before testing it.

@Max:
fully agree in your comments, I´ve experienced also what you say.
For instance, when testing "dynamic" performance (checking vibrations yes/not) there are many times that a transition phase (low to mid rpm) induce vibrations, but then disapair al high speed. This is bad also, since our copters are changing a lot the rpm very often and quick.

Also you can have a bad shape under high speed, but yet equilibrated in vibrations : this is bad also. You will notice in the low performances of the propeller. This happens in most flexible probellers.

[leopold1]

Any one using the foxtech supreme CF props.
At first glance they seems to be good. But then again, If anyone has tested them, i would like to know your experience.

[LPR]

Leo

I have two Supreme CF 17 x 5.5 on order.
I will compare them to T-Motors props.
It would be nice to fined a reasonably priced alternative to T-Motor's props but I won't be holding my breath.

Larry

[leopold1]

Great,

Looking forward to your review
It would be great that these props are good at a nice price.

[bob.titus]

hello Afernan,

could you specify "with the exception of the very good´cheap: the old RCT15x 5.5", they make different kind of 15x5.5

Thanks,
Bob