Originally Posted by
RaceMechaniX
Lehners should spin freely with no cogging or detent feeling. If they feel like they have rough spots or lumps than a winding is bad.
I am sure Chris is asking about a Neu 1530, since a LMT 1530 is pretty small.
Chris, it depends on the vintage of motor. Most early Neu motor had a pretty strong detent, however Neu changed the magnetic design on some motors and they felt very weak compared to the old motors, but were just a different magnetic design.
In short, yes if this is a late model motor you can probably easily turn it over by hand. It should have some detent feeling though. Only way to know for sure is to check the magnets with a Gauss meter and check the winding resistance and installation.
TG
If memory serves me correctly (don't bet on it) Neu started "skewing" or "twisting" stators several years ago to lessen the cogging effect - may have been to better allow helis to freewheel (autorotate).
I had two 1521's - 0ne early, one late (Ray I sold you one) that felt different when hand-twirled.
Not to worry
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