OK, so I have received my motors as well. One is below:
I figured out that I have a nasty habit: no pictures of actual thing, only internals...
What I can say so far:
Bad:
1. Liquid oil is only "for smell", as there is only like half of teaspoon of it in entire motor.
2. Gears are lubricated with thick grease (a bit silly to do that in the same bath as liquid oil)
3. Sun shafts are lubricated with third kind of grease (green). Also in same batch with liquid oil.
4. Quality of metal is as always. Shit.
5. All bearings are of "rubber sealed" type, even though they are in liquid oil bath and have additional glands on shaft. All these greases will wash out and make a mess eventually.
6. Both ends of motor shafts are not connected one to another, so possibly will break under heavier loads (drops, potholes, etc.)
7. Even though motor was sealed with silicone, some oil has leaked. Possibly during delivery via air, when atmospheric pressure dropped. That raises some questions about sealing the thing for various operating temperatures.
Good:
1. Suns use needle bearings - wow.
2. Ran from first try on Kelly KBS controller, all wire colors are correct. Was quite slow at 30V. No-load current ~1.2A (not sure if this is correct).
3. Gear runs quietly, almost no gear noise at no load. However there was some rattling. Possibly will go away with load.
4. Due to shaft dimensions, thicker phase wires are not possible. Probably will have to machine new, thicker shafts, to fit 4x thicker phase wires.
5. Even number of stator poles allows KV increase of 2x or 4x. Probably will make it 4x. Pictures above show this in process.
crossbreak said:
around 420rpm loaded @48V, so you'd need 90V xD I'll really measure KV tomorrow when i have my CA alternative connected
OK, so at 42V (loaded 12S LiPO) it will be 22km/h with 12.5" wheel...
So I have a dilemma now. I can increase KV by 2x or 4x. 44km/h is a bit too slooow... So... 88km/h? Probably that is too crazy for 12" wheels, right?