I made a new board. This time i gave focus more on practicality, aesthetics and range.
It has two FOCBoxes, 10S5P of INR-18650-35E cells, FET-antisparkswitch, and LEDs on front and back. And chinese 90mm hubs, 70KV 550W per hub.
Now on very hot days, about 8C, i have measured and estimated that the range will be about 30km. More on summer i presume.
The board is as thin as i could make it from veneers, 28mm. I slimmed it from the edges, so it looks thinner. It weights 9,7kg
For those who understand finnish, i made the same article on local hackerspace: http://pori.hacklab.fi/wordpress/?p=694
Here’s the completed board.:
First i pressed the board into shape and made the holes for electronics. And sinking bolts (hammering bolts?) for the lid.
Glued the top. Then i made the tracks for all the wires.
FOCBoxes are in place.
Balance charge connector.
Motor connector with hall-sensors. (These winter-patterns on wheels have been stripped off already. Going to make TPU tires someday)
Gluing the bottom for the lid.
960A for spot welding. Makes good welds.
The tiger is in place. Printed on waterslide decal paper.
Also the pattern for the top side.
I used polyester resin for the bottom side.
Close view of the LED-switch and charging connector.
Close view of power switch.
And so far i have been riding about 30km. Problems has been so far that one lid bolt got off during ride, because it was loosely tightened. Other one is that the light switch got broken with sparks. Luckily easy to fix.