Often the question of Sensor/Sensorless power comes up. I think the best way to answer is that "it's possible" for either type of motor to offer more power then the other.
If both were built to identical specs, meaning magnet size, coil type, stator size and all of that, they would be the same. That is not the case though. Most of the sensored motors are designed around one particular type of motor. Sensorless systems often times are not. This allows them different characteristics then other motors.
It's not so much that one is better or worse then the other, it is that they are different. And nothing that is different will be the same.... Oh jeez. That sounds corny.
I'm sure that some sensorless systems offer "on the fly" timing adjustment, or have some sort of software that tweaks that. Personally, I'm not aware of specifics on any of them. These things I'm sure have an effect on how the motor drives, but is probably done to help the "feel" or throttle curve if you will. At some stage I'm sure Sensored systems will offer the same type of adjustments. But in the end, I think linear power delivery will reign supreme.
Sintered Rotors are much stronger, and have a higher tollerance to heat.
Voltage and current go hand and hand. WIth out both, you loose on all fronts. You need current and voltage.
As far as "readings" on motors, it's simple, and we have a detail on our website of what type of meter to use.
An Inductance meter will measure the inductance of each coil essentionally telling how many turns it is. We are in the process of publishing the data on what each of our motors should be. From our testing we find our motors to all be within a few percent. The best way to measure, is with the motor out of the car, and just the rotor removed. This tells you what "just" the coil is. Hopefully we'll have the website updated with this information in more detail soon. There is no need to tear the motor down, just take out the rotor.
All our motors are hand wound here in Irvine CA.
Under no load, the Bonded rotors have more RPM. How much I don't recall. But under different loads this is not the case. The Sintered rotor always draws less current though. So its much more efficient, and will pull more gear at the same time. Its like magic.
Our stand alone Lipo safety's also have a "mountable" LED that blinks in case you don't notice the "burps" of the throttle. It comes on just after the noticable "drop" from the pack. We agree, that if you're sharp, and pay attention, a cutoff isn't needed, but often times in the "heat of the battle" not all of us pay attention.
I'd say that eventually future Novak products will incorporate Lipo safety profiles as standard.