Complete Rigid: ~$120
4x VESC: ~$350
4x HummieHubs: $350
2x 12s 5Ah Batteries + Charger: ~$100-150
Wired Nunchuck (for Reliability): ~$5
So really, you need a lot more money to do this. Safety gear too. Plus renting out a tarmac.
If the community sets a bounty for setting a new record by 5-10mph, I’ll consider it if I would break even.
Where do you get those prices for VESC?
If you are willing o wait a few months, Enertion sells them with discounts (the more you buy). Pairs sell for $180, so two would be $350 more or less (shipping not included).
I wouldn’t build this till VESC 5.0 or if you feel capable of switching the current shunts with ones for 10-12s voltage at 30-60Amps. FOC doesn’t like going higher than 10s 20Amp with my current unsensored motor.
We need a drag slick for ESK8.
I’d love to see some sick burn outs on a skateboard. RAD!!
Urethane is for pussies. JK
The seizmic speedvents hit nearly 81mph in a downhill run which is the absolute fastest recorded speed on a longboard to date.
I’m surprised he did that on quebec roads! They’re absolute shit!
And it’s the same guy that hold the electric skateboard record posted above!
What’s the theoretical max speed using 4 of your 200 kv motors, 4 vescs, on a 12s set up. I have pretty intense leathers.
I got 96kmh using the electric skateboard speed calculator with 200kv, 12S, and 70% efficiency. 1:1 gearing.
Don’t think that the @Hummie hubz are 200kv, think they are 80kv or 90kv.
Wheel size is around 83mm, so that would give you around 55km/h unweighted, weighted around 39km/h
@photorph, go for it!
btw, in order to reach 100km/h unweighted, wheels must be 150mm for these motors
@Hummie said in post 15 of this thread (http://www.electric-skateboard.builders/t/world-record-for-electronic-skateboard-speed/1620/15) that he has a special version with 200kv for someone crazy enough to try this.
maybe i am the pussy here but was this not the guy who lost the rubber in his front hubs?
so maybe try it with some normal outrunners via belt, i mean for the speed record in normal situation i have not heard of anyone losing his urethane.
I’m not sure and maybe the math below is accurate. Haven’t lost any rubber that was the epic ngv video. I do have 4 200kv
did you check what happens with your urethane shell at 8500ish rpms? shouldnt it just stretch and fly off eventually by centrifugal force?
Probably. Never tried. I could add a core and should. Paint a harder duro rubber on the inside before pouring or add some fiberglass right at the center. The rubber needs improving. I’ve been good at half that speed though
@Hummie You could try putting a steel ring or belt into the urethane when you mold it. Like car tires.
Little car tires with a little tread would be awesome. Not going to happen likely. Looked into how they make those. There’s no DIY method I fear. Composites with a mix of rubbers and whatever else they can find. Still natural rubber is in there a bit. Can’t be beat
@Photorph wanted the speed calculated with 4 200kv motors. Look above my last post.
I’d be really interested to see someone try breaking this with our improved systems.