I sure hope you will stick with air cooling. This will give the rest of us time to surpass the performance of your monster motors!
Bigmoose, I was just following a link in the technical section. I have no experience with motorcycle alternators, do they use neo mags? Also, no the indexing doesn't indicate the warning is just for bonded magnets, since it's the final part of the article and has a typeface equal to both the scintered and bonded sections. If you tell me it applies only to bonded, then I'll take your word for it, and send a note to MCE to correct their article.
I'm still trying to find a good reason to give oil a go rather than simply follow the crowd, since if I did that I'd have a mountain of burned up motors. I do need rain, mud, and beach bikes, so oil is attractive for that over a sealed motor.
The heat still needs to get transferred to air, and if it's done at the covers you're probably looking at well under 1kw in max heat rejection according to my calculated estimations. If you want to pass what my motors are doing using oil, then you'll need a radiator and a pump. The main motors I've used are barely more than the H35 in terms of stator size. It's the turn count and wheel size that makes them outperform what the vast majority use.
BTW, I only have one monster motor, and I just got it back on the road today with a controller that I hope will feed it, but Hubmonster has never been warm much less hot. That was when it was sealed, and now that it's ventilated it probably never will, at least not with a controller I can afford.
The new high efficiency motors I'm testing can't be oil filled without modification to give up their series/parallel shifting capacity, but their smaller outside shell makes them a poor candidate anyway. Those little motors definitely aren't monsters, and though they outclass typical ebike hubbies by a pretty wide margin in terms of build quality, design, and performance, they're too different to directly compare. Once I get around to ventilating one, I'll call it the MiniMonster in your honor, and it will most assuredly laugh at the oil drippers.
If you want to talk about design changes to include proper oil cooling that will result in a sub 20lb hubmotor that is economical and more powerful than can be accomplished with air cooling then I'm all ears. Until then let's see an oil filled hubbie running continuous at greater than 200wh/mile performance levels, because we're already hitting that and still haven't found the limit with an air cooled motor that could be called an HS40 if Xlyte made it.
Don't forget Zombiess bike ran at 88wh/mile to win for the ebikes last week.