Hi, my name is Adrien.
I just started learning longboard a few weeks ago and discovered the DIY eskate community at the same time. I start to really enjoy the sport/hobby and as I live in a really hilly area in Bristol in the UK I thought going electric could be a good step forward.
I’m however not yet willing to pay the price for a £1000+ board knowing the battery could die in a few years with me not being able to replace it. A DIY build is therefore a good solution for me I believe. I’m also an Engineer so I kind of enjoy that sort of design project.
Before pulling the trigger, I am willing to get some advice from experienced builder about the build I designed.
My requirements are:
- A skate that will be easy top ride – I am not an experienced rider
- Good torque to climb hills
- Good breaking power and regen
- Speed does not matter too much for me – Not planning on dying on a skateboard :), let’s say at least 15-20 mph
- Around 10 miles range from a charge
- Safe and convenient charge of the battery
- As water-resistant as possible to withstand the UK weather
- Cost less than £500
I did some initial calculation and created a little script in Matlab to start designing my build. I still need to make some assumptions on the motor curve to calculate how fast I could climb some hills in my area:
Those calculations and my research lead me to the following components for now:
Trucks – I think I’ll take the caliber II because of the profile with flat face which could be nice to secure the motor mount https://www.amazon.com/gp/product/B0719BXH7G/ref=oh_aui_detailpage_o00_s00?ie=UTF8&th=1&psc=1
Wheels – 83mm wheels, hesitating with 90mm https://fr.aliexpress.com/store/product/78A-Skateboard-Wheels-87-52mm-Long-Board-Cross-country-83-52mm-Wheels-6mm-Riserpad-35mm-Bolts/2943263_32829115461.html?spm=a2g0w.12010108.1000016.1.3c116253FVfTr1&isOrigTitle=true
Motor – Two options there:
6354 190KV 2450W cheaper but not waterproof https://www.banggood.com/HGLRC-Flipsky-6354-190KV-2450W-Brushless-Sensored-Motor-Shaft-8mm-for-Electric-Skateboard-Rc-Models-p-1323575.html?rmmds=search&cur_warehouse=CN
6365 190Kv 3550W (Water Resistant, Sealed and Sensored) more expensive, waterproof but maybe too powerful? (Might be a non issue if I can limit it with the VESC) https://eskating.eu/product/eskating-pro-motors-6365-190kv-water-resistant-sealed-and-sensored/
Motor mount – Cheap but apparently good quality and only requires some tweaking to fit calibre II https://hobbyking.com/en_us/motor-mount-5.html?wrh_pdp=3&___store=en_us
Gearing – Not found a suitable solution yet – hesitating between chain or belt and will tweak the gear ratio based on my calculation for torque required to climb some hills in my area at a decent speed.
VESC + remote kit – Maytech https://fr.aliexpress.com/store/product/Maytech-logboard-skateboard-remote-controller-with-receiver-and-VESC-ESC-50A-at-12lipos/1630416_32709724719.html?spm=a2g0w.12010108.1000016.1.519716c79AfuMJ&isOrigTitle=true
BMS – 12S 80A Bestech https://eskating.eu/product-category/bestech-bmss/
Power switch – Probably going for a cheap loop key
Charger – Depends if I go for BMS option or not. It will be 42V charger or balance charger if no BMS
Battery – Not sure about what brand to buy but I think about going with 3*4S 5000mAh 25C cells to get a 12S pack and keep the thickness below 35mm https://hobbyking.com/en_us/turnigy-battery-5000mah-4s-25c-lipo-pack-xt-90.html?___store=en_us https://hobbyking.com/en_us/zippy-compact-5000mah-4s-25c-lipo-pack.html
Electronics casing: Tupperware style solution to keep cost down and be as water resistant as possible
If I could get some feedback that would be awesome. The build as I created it should end up around £400-£500. Thanks.