Stielz
100 W
I figured it’s about time I shared my electric longboard project here. I finished this 2 years ago lol.
First of all, this thing is incredibly fast with massive acceleration. I have to really lean forward during acceleration to stop it throwing me off the back. I have been using a data logging device which has recorded power levels of over 4kW during acceleration and been up to 60km/hr on flat road – still haven’t maxed out the speed, that’s as fast as I am game enough to go with my limited protective gear.
Quick specs
Speed: >60 km/h
Power: >4000W
Range: 30km easily
Battery: 6S, 20Ah
Controller: dual Hobbyking 150A Sensored car ESC
Motor: dual Turnigy SK 6374 145kv modified as rear wheel hub motors with Hall & temp sensors
Longboard: Loaded Dervish bamboo deck, Paris trucks, Abec11 92mm Flywheels
Cost to build: $1,200 NZD
Time to build: 4 months
Here’s some photos I took during the build. Unfortunately I don’t have any photos on file of the finished board with the hub motors in place, I really need to take more at some stage.
Hall sensors for the motor. Had to use SMD package to fit in the stator slots.
Extra bus caps for the ESCs, Low ESR, High ripple current.
The fibreglass electronics enclosure was designed to flex with the board. The Loaded Dervish bamboo deck I really like the way it rides and so didn’t want to interfere with that so I built the enclosure to bend with the deck.
Inside the enclosure I have 8 x 3S,5000mAh lipos, configured in 6S 4P so 22.2V nominal, 20Ah. Heaps of battery for a skateboard, I ride it for about an hour on a single charge.
Also the ESCs. Ive been using Hobbyking 150A sensored car ESC (I added halls to the motors so it gets really good startup torque from a dead stop). These ESCs have worked pretty well, until they don’t which leads me to the issue.
I’ve gone through 5 of these ESCs. Most of the time they just die for no apparent reason – brain board dies but power board still ok. I had the longboard working all good for the last year until recently one of the ESCs started pouring out huge amounts of smoke – after I had stopped! Very strange because I hadn’t been pushing them hard. In fact it was just after a downhill run. It happened moments after I stopped recording this video.
[youtube]6cU8Hk9fzdA[/youtube]
So now I’m assessing my options for some better ESCs. Recommendations please!
Already spent $1,200 on this so hopefully not too much more..
First of all, this thing is incredibly fast with massive acceleration. I have to really lean forward during acceleration to stop it throwing me off the back. I have been using a data logging device which has recorded power levels of over 4kW during acceleration and been up to 60km/hr on flat road – still haven’t maxed out the speed, that’s as fast as I am game enough to go with my limited protective gear.
Quick specs
Speed: >60 km/h
Power: >4000W
Range: 30km easily
Battery: 6S, 20Ah
Controller: dual Hobbyking 150A Sensored car ESC
Motor: dual Turnigy SK 6374 145kv modified as rear wheel hub motors with Hall & temp sensors
Longboard: Loaded Dervish bamboo deck, Paris trucks, Abec11 92mm Flywheels
Cost to build: $1,200 NZD
Time to build: 4 months
Here’s some photos I took during the build. Unfortunately I don’t have any photos on file of the finished board with the hub motors in place, I really need to take more at some stage.
Hall sensors for the motor. Had to use SMD package to fit in the stator slots.
Extra bus caps for the ESCs, Low ESR, High ripple current.
The fibreglass electronics enclosure was designed to flex with the board. The Loaded Dervish bamboo deck I really like the way it rides and so didn’t want to interfere with that so I built the enclosure to bend with the deck.
Inside the enclosure I have 8 x 3S,5000mAh lipos, configured in 6S 4P so 22.2V nominal, 20Ah. Heaps of battery for a skateboard, I ride it for about an hour on a single charge.
Also the ESCs. Ive been using Hobbyking 150A sensored car ESC (I added halls to the motors so it gets really good startup torque from a dead stop). These ESCs have worked pretty well, until they don’t which leads me to the issue.
I’ve gone through 5 of these ESCs. Most of the time they just die for no apparent reason – brain board dies but power board still ok. I had the longboard working all good for the last year until recently one of the ESCs started pouring out huge amounts of smoke – after I had stopped! Very strange because I hadn’t been pushing them hard. In fact it was just after a downhill run. It happened moments after I stopped recording this video.
[youtube]6cU8Hk9fzdA[/youtube]
So now I’m assessing my options for some better ESCs. Recommendations please!
Already spent $1,200 on this so hopefully not too much more..