j3tch1u
10 kW
The goal of this project was to build a full-size folding mountain bike that I could bring onto the high-speed rail here in Taiwan and explore the mountainous terrain of this country. In addition to being light-weight and portable, it had to be reliable, fast enough to keep up with traffic (60kph) and able to climb very steep hills. I decided against building a custom frame (and kept a lot of components stock) in order to get rolling asap and be able to build a few more for friends quickly/economically.
Specs of the bike are as follows:
Frame/fork: Montague Paratrooper
Battery: 14s7p Panasonic NCR18650PD
Capacity: 20.3Ah
Front/rear motor: MAC 8T (courtesy of paul aka cell-man)
Controllers: 12FET 4110 Infineon (EM3EV)
BMS: 14s Li-on (EM3EV)
Throttle: Magura 5k
Torque Sensor: Thun X-CELL RT
Brakes: Magura MT-4
Battery Bag: Salsa El Mariachi
Controller Bag: Revelate Pika
No Load Speed: 69kph
Real Speed: 60kph on flat road
I have the throttle input going into the CA V3. The CA DP connects to only the rear controller but both throttle lines are tied together (this required i remove the throttle diodes inside each controller and replace with a 1k resistor). The controller arming wires are also tied together to one switch. I am not using the 3-speed switch or e-brake (I don't use them and they add more wires) however I am planning to use an auxilliary pot to adjust the pedal assist level.
First let me say that I am totally sold on dual motors. There is a hill near my house that bogs down the bike on a single motor at 2.5kw. With both motors I am able to zip up that hill. It feels like more than double. The motors stay luke-warm (sorry no quantitative data). With the original knobby tyres the front wheel would get a little squirrelly on WOT from a dead start. After I replaced the tyres with some Schwalbe City Jets, the squirreliness has subsided.
What I'd really like to know is how much the bike weighs. It feels light (29kg-ish). Unfortunately, a couple weeks ago my bi-polar, psycho ex disappeared with my scale, some of my personal belongings and my 5 beloved dogs. I was at my workshop all day working on my battery pack and came home to discover everything/everyone was gone. Didn't even get a chance to say goodbye to my kids (still don't know where she is). At the time I went into panic/shock/depression but i'm ok now (learned to see things from a different perspective). Life rolls on..
Specs of the bike are as follows:
Frame/fork: Montague Paratrooper
Battery: 14s7p Panasonic NCR18650PD
Capacity: 20.3Ah
Front/rear motor: MAC 8T (courtesy of paul aka cell-man)
Controllers: 12FET 4110 Infineon (EM3EV)
BMS: 14s Li-on (EM3EV)
Throttle: Magura 5k
Torque Sensor: Thun X-CELL RT
Brakes: Magura MT-4
Battery Bag: Salsa El Mariachi
Controller Bag: Revelate Pika
No Load Speed: 69kph
Real Speed: 60kph on flat road
I have the throttle input going into the CA V3. The CA DP connects to only the rear controller but both throttle lines are tied together (this required i remove the throttle diodes inside each controller and replace with a 1k resistor). The controller arming wires are also tied together to one switch. I am not using the 3-speed switch or e-brake (I don't use them and they add more wires) however I am planning to use an auxilliary pot to adjust the pedal assist level.
First let me say that I am totally sold on dual motors. There is a hill near my house that bogs down the bike on a single motor at 2.5kw. With both motors I am able to zip up that hill. It feels like more than double. The motors stay luke-warm (sorry no quantitative data). With the original knobby tyres the front wheel would get a little squirrelly on WOT from a dead start. After I replaced the tyres with some Schwalbe City Jets, the squirreliness has subsided.
What I'd really like to know is how much the bike weighs. It feels light (29kg-ish). Unfortunately, a couple weeks ago my bi-polar, psycho ex disappeared with my scale, some of my personal belongings and my 5 beloved dogs. I was at my workshop all day working on my battery pack and came home to discover everything/everyone was gone. Didn't even get a chance to say goodbye to my kids (still don't know where she is). At the time I went into panic/shock/depression but i'm ok now (learned to see things from a different perspective). Life rolls on..