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Is 1:1 gear ratio with dual drive a bad idea?


#1

So I’m wondering if a 1:1 gear ratio is a bad idea (motors getting too hot ect), if I run a dual drive system. The motors are both 300 kV, and I’m running S6 Li-Po. My goal is obvious to get a decent top speed, but i clearly dont want to destroy my motors at the same time. I’ve read a few threads and watched some videoes, but can’t really seem to find anything about 1:1 gear ratios. Any help would be appreciated! :slight_smile:


#2

Do you have any idea how fast you would be going with 300kv 6s and 1:1 ratio?
I don’t think you have


#3

Well, I used an online calculator to roughly get an idea, but like most online calculators, theres far from theory and realism, so didn’t really think it would stick.


#4

What is your desired speed ?


#5

Your setup speed would be 100 km/hour but of course not enough torque to ever get there


#6

Hub motors are inherently 1:1, so it will work, but you might want to use lower Kv like 192 or 160. i don’t think 300kv at 1:1, even with 2 of them, will be any good from a stop or going up a hill.


#7

Yes, bad idea, those numbers are off.

Your Kv is a bit too high. Your gearing is too high. Much below 1:2.5 is generally not advised especially on lower voltage systems.

Your starting tq and hill (or small bump) climbing ability with that setup would be painful.

Use the esk8 calc, quite a few people have reported that it is fairly accurate.


#8


#9

Yea that is way too fast with nowhere near enough torque.


#10

Haha

10 Characters


#11

@Hillso please tell me what calculator that is.


#12

first result:
http://www.electric-skateboard.builders/search?q=calculator