(17-Mar-2021, 07:21 AM)bLoWsMokE Wrote: miniquadtestbench dot com.

Go there. It has TONS of motors all tested and compared, graphs all that chizz....... you seem like the type of person who would really benefit from this website. I'm not sure it tells you the exact specs, like what type of metal etc, but it will give you a performance readout and ur able to compare and contrast to other motors.

Anyway just go check it out, I think you'll be pleased to see that this resource exists.

Yes I did a lot of research before even posting here and have been through that website. It's a great resource and I could learn a lot about testing and the general characteristics and qualities of different drone motor companies. However, unfortunately they have not tested a single motor under 2000KV on that website and my requirements are for a high torque, low KV (350-480 or so) motor which I will only be driving up to a max of about 6000-6500rpm.  Also just because a company has a good product in a mid to high KV range, ie above 2000KV, which are the only ones miniquad tested, does not necessarily mean their low KV motors, which seem to be a lot rarer, are good quality although it suggests they might be more often than not. 

I have bought my own testing equipment which will allow me to at least create efficiency curves.

There doesn't seem to be an answer here that will address your question satisfactorily. It seems you have accepted that fact as you have purchased your own testing equipment. I hope you will report your findings so others can benefit from your research. Also, as you move forward on your project bear in mind that external factors, aside from overall build quality, can impact the performance and life expectancy of a motor. The motor is only one link in the chain.

(17-Mar-2021, 02:59 PM)Sphere Wrote: There doesn't seem to be an answer here that will address your question satisfactorily. It seems you have accepted that fact as you have purchased your own testing equipment.  I hope you will report your findings so others can benefit from your research.  Also, as you move forward on your project bear in mind that external factors, aside from overall build quality, can impact the performance and life expectancy of a motor.  The motor is only one link in the chain.

Thanks. I agree. From the answers on here there appears to be no way to actually verify the materials used and many other aspects of the motor fabrication such as balancing, gap size, etc. You just have to trust what you are told is actually the case. If I was only building a drone for my own use I wouldn't be analyzing things to the degree of granularity that I am. However, when you are going to be shipping tens of thousands of products over the next few years you need to be fastidious and due your proper due diligence. 

The reason I bought my own testing equipment is not because of answers on here. It is because I just can't seem to get efficiency curves out of some of the suppliers so I need to create them myself and then I want to verify the efficiency curves of those who do supply them. While not getting all the data from some suppliers might be enough to disqualify them as an OEM supplier for some it is not for me. I am also going to be stress testing the motors, ie on/off/cool-down cycles 24x7 which will help to determine their longevity.