Hi,

I’m currently sourcing parts for my first build and am learning along the way. The biggest design constraint for me is climbing a fairly steep hill on my commute (10-15%), and my weight (~115kg)

I have decided to go with the Tacon Big Foot 160, and have built a small spreadsheet calculator to understand what kind of pack I want.

However I’m stumped when it comes to understanding the motor specs… I’m much more familiar with brushed DC motors where you are given some nice parameters to work with:

- Stall Torque (at given voltage)
- Free speed (at given voltage)

You can pick your gearing ratio to get close to peak power at ~50% stall torque, **and you can assume that both free speed and stall torque scale linearly with the voltage (ball park estimate).**

I feel like I’m missing a bunch of data for the Tacon:

- Sure, it’s 2600W… but at what torque and voltage?
- Does a BLDC motor have a stall torque?

Is there anyway to estimate these? Do BLDCs have entirely different characteristics that make the calculations vastly different?

How do I approach this?

Thanks