Usually i’m very conservative about showing my builds but i thought this one was worth a post. The board has it’s origins back in the spring of 2019 but at this point i’ve changed everything except the vesc 6’s and my front truck so i’ll just call it a new build.
This is my flagship, my wallet marauder and my soon to be inevitable demise. Therefore i’ve given it the very Swenglish name “Mörder Börd”
It’s the usuall addiction behaviour that leads to shit like this, you build a killer board with 60km range and dual 6384 motors transferring power through Etoxx gear drives. Then you want to improve top speed without sacrifising torque, in comes 80100 motors which of course, drastically increases power consumption and leads to a deep desire for a bigger battery. Suddenly 200 Samsung 35E cells magically appeared at the front door by a very suspicious mailman.
In the dark corner of my basement those cells was forged into packs in the quest to exterminate range anxiety. To be specific 2x 12s8p 35E packs wired in parallel to achieve 12s16p and just under 2,4Kwh.
Both packs has individual BMS’s to make them truly seperate from one another, this means i can remove one pack if i’d like. After accepting the fact that those packs took up every lite square inch of the not so small Peli 1300 case i made the decission to do most of the wiring in a smaller box on top of the big one, boxes on boxes.
Both packs has their own charge and discharge port wired up into this smaller box, i can from here run them in parallel, or just use one pack at a time if they for example wouldnt have the same voltage. they also have seperate charge ports for individual charging. the parallel connection itself is done ourside of the box where 2 XT90’s meet a pair of AS150 connectors followed by 8 gauge cables to the Vescs.
For the deck i could go with my old HS11 but since i had a Kaly racing deck laying around (Generously donated for a savage cause by the main man Ernesto) i decided to use it. Some would call it a crime to put boxes and bindings on this beautiful craftmanship, if you feel offended by this i want to express my deepest apologies, it’s just the way i’m wired.
Finding a suitable VESC case is not the easiest task when running 80100 motors with etoxx drives, since the motors are very close to the deck and that are big as a damn beer can. Either the box is to small to host dual vesc 6’s or it’s to big and hits the motors while turning. Luckily the good gentleman @Lee_Wright has an excellent Vesc enclosure design up on Thingiverse (https://www.thingiverse.com/thing:3924745). Although Lee’s design does expose the Vesc heatsinks to open air i wanted to further improve the cooling propertys, I did this by cutting out my own lid from a 1mm aluminium sheet and then put big heatsinks on top of the lid. the vescs, lid and heatsinks are bolted togheter using the vesc’s mounting holes, between it all i put some cooling paste to improve the contact surface. It turned out that this did aswell hit my motors while turning though, but one does’nt so easily give up on a 30 hour print job. So i came up with a simple wedge to put between the enclosure and the deck, everything is bolted togheter using the inner spring position holes on the vertigo baseplate.
At this point the board was pretty much complete, final touch was to fix the wiring, add a frame with skirts on the Vesc enclosure and spray paint it in the copper/bronze color scheme. I also added 9" mudpluggers on the drive wheels which did an amazing inpact on it’s off-road capabillities.
Complete parts and specs
Front Truck: Trampa infinity, superstar hubs and 8" mudpluggers
Rear truck: Trampa Vertigo, megastar hubs and 9" mudpluggers
Deck: Prototype Kaly race deck
Motors: APS 80100, battle hardened and bearing upgraded.
Transmission: Etoxx APS 80mm specific gear drives 5:1 ratio
Bindings: Trampa ratchet bindings
ESC’s: dual VESC 6
Battery: 12s16p 35E, 55AH or 2384WH
Additional: Trampa barrels, Etoxx truck extensions
System theoretical peak effect: 12 000 watts
Calculated range: about 95km at 25wh/km (usual consumption 23-27wh/km)
Top speed: 60kph
If you stuck around this long for some reason, thank’s for reading and here you go, the final result (for now).