o00scorpion00o wrote:I still think geared hubs are better for slower riding up hills
20mph with no pedaling up an 8-10% grade for 15 minutes suits me just fine. I averaged 16-20mph in previous summers with DD motors and it felt right, but I was still "assisting" from time to time with even my 24" Clyte 504 cause it could and did bog sometimes if I had to slow down for whatever reason (like elk or turkey crossing the road
). Anything over about 30mph on a mtn bike on these mountain roads just feels sketch to me. I want enough speed to justify the commute compared to driving, but not so much speed that I'm gonna kill myself if I wreck, which I've done before and will do again I've no doubt.
20 mph is a reasonable speed, but any motor bogging down is bad.
Direct drive motors don't have the same torque as geared motors of the same size though, the X5 motor isn't a fair comparison to a small geared hub. And what makes the geared hub more efficient is it's ability to keep spinning faster than a direct drive would at the same mph and power level!
Sure you can probably dump an extra 20 amps into the x5 but with the geared hub you wouldn't need to in my opinion.
the magic pie is a very high torque motor, and a slow wind and on the same hill the mac went up at 29-30 mph that the pie did at 21-22 mph, same power, controller ping battery on 48 volts. The mac did at 2000 watts what the pie would have needed closer to 3kw to do the same mph up the same hill.
Now the hill is nothing the pie can't handle, it just didn't have the voltage needed for to achieve the same speed, it has the torque and buckets of it.
But the temperature of the pie was just warm where the mac was hot. But I'm confident the mac could do that hill every day and not burn, this is why I want a temperature sensor to keep track of temps, just in case, But the 10-12T would do it much better, not as fast but would probably be much cooler.
A faster wind pie may have done it, but then again a faster wind means less torque and a faster wind heats up faster on hills as it gets bogged down.
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