So in the past I’ve been very bad about documenting any of my builds, so this time I thought I’d start with the documentation in the hopes that while I build it I won’t have any excuse not to put down the details here while it is in progress.
The board will be a dual motor mountain board. In my inexplicable tradition of giving all my boards Slavic names I’ve chosen horská doska, roughly translated from Slovak as Mountain Board.
The budget is about $100 per month, plus the occasional splurge. So it’ll likely take me until next summer to get all the pieces.
The design I’ve been using in the past, extruded rail drop decks, has worked really well and this one will be the same. I will spend some time rendering it in Solidworks so will post renderings here.
- batteries will be 10S6P of the new 4kAh Sanyo 20700’s. While these will give me epic range, they are only 15A batteries so the 6P will give me 90 Amps, which seems to be a pretty good budget for a dual motor (45A per motor) https://liionwholesale.com/pages/search-results-page?q=sanyoncr20700b I spent this month’s budget on the first 12 of these.
I thought about making a carbon fiber frame, but with such a ridiculously heavy pack and 2 motors there isn’t really any point in trying to shave weight.
Wheels will be 6" pneumatics. I’m currently thinking about converting Evolve’s conversion kit: https://evolveskateboardsusa.com/collections/gt-carbon-parts/products/gt-series-all-terrain-conversion-kit#tab3
Probably, since I want this to be a super-reliable board, I’ll steal the VESC6 out of the WidowMaker (which used to have a slavic name before it tried to kill me) and get another VESC6. Or B) if the dual FOCBox comes out in time I might get one of those.
This opens up the possibility of turning Widowmaker into a dual 5065 using 2 VESC4.12’s.
I really want to play with the flexboardz suspension, but I don’t have sufficiently detailed drawings or models to reproduce one, so that would be a big experiment. Failing that I’ll just go with mountainboard trucks.
I’ve been looking for another Tacon Bigfoot 160 to use in this build, but you can’t seem to get them anymore. So I’ll probably go with the 6355’s that I put on my first dual motor build. products/electric-skateboard-motor-6355-190kv These are sensored, which is probably better anyway.
I’m also going to try for direct drive. Years ago I made a gearcutter, so I guess I’ll have to dust it off and try to remember how it works.
There are some great projects for remotes going right now, so by spring I expect there to be some great new products (or DIY’s) available, so that’ll be the last thing on my list.
More to come!