So I got $2200 to blow, or $1500 and $700 to buy a new phone.
I’d build everything, including battery.
First build. Beginner skateboarder.
I want torque more than speed. I’m fine at around 25mph max I think.
I’m currently entertaining these options using 12s6p 42a molicell and unity or Ubox.
1) 2wd 72:15 belt drive 6" AT pneumatics 170kv 6396 65-80a 4550w maytech motors
Using 3dvisas calc I get: 48.7nm torque at the drive train, 17ml range, 24mph avg. speed.
I can get a 60t wheel pulley aswell and get 29mph and 40nm torque, if I need more speed.
2) 2wd 60:15 belt drive 6" AT pneumatics 140kv 6374 flipsky motors
Using 3dvisas calc I get: 38nm torque at the drive train, 17ml range, 24mph avg. speed.
I can get a 46t wheel pulley aswell and get 31mph and 29nm torque, if I need more speed.
3) 4wd 60:15 belt drive 6" AT pneumatics 140kv 6354 flipsky motors 2450W 65A max
Using 3dvisas calc I get: 53nm torque at the drive train, 8.5ml range, 24mph avg. speed.
Dropping the gear ratio I can get more speed again.
The range is halfed, but will it really be halfed? I would think 4 motors taking the load, would result in less amp draw per motor, so the range would be aprox the same.
and 4) 2wd 135:15 belt drive 8" AT pneumatics 230kv 56123 inrunner SSR motors 95A 9000-15000W max but would run at max 5400W, I would use 16s6p in this specific case with the Ubox.
Using 3dvisas calc I get: 63nm torque at the drive train, 18.8ml range, 29.9mph avg. speed.
Which setup is best in your opinion and why?
Here are my thoughts on each setup:
1st setup: I like the idea of 6396 maytech motors. I have read the motors are the best. Or the TB motors, they go hand in hand. It checks all the boxes in terms of torque and speed configuration it seems.
2nd setup: Cheaper that 1st to make. I am not so comfortable with flipsky stuff from what I’ve read. However on paper, it seems great. Just a little less power than 1st setup, but also could up the torque with a 72t. But I feel like I will be limited to no more than 6" wheels as more than that I feel could be lack of power.
3rd setup would be kind of expensive, more components, more things that could go wrong. But it would have 4 wheel traction which could be fun. Get more torque than 1st and 2nd setup, but with lower apparent range. (still not sure the range would go down this much?) 4 motors just looks cool too.
The 4th setup,I could at some point, build an electric surfboard using the motors. However, it may not happen for a few years so there may be better options then. Also, the gear ratio is a bit tough. It’s my first build, not sure I can handle making it. I was thinking I can 3d print the 135t for the 8" wheels, and it could work.
Oh yeah the battery pack would be modular 4 packs of 4s6p. That way I can make 12s6p or 16s6p.
If there are better options besides the ones I mentioned let me know. I’d love to hear some fresh ideas I am not aware of.