[brian_]

Motor is including brake system if I understand correctly. The mounting bracket for the calliper should be custom made.

The brake rotors are supplied, but calipers are not, so you would need both the brackets and the calipers that mount on them. The listing says "u could use original brake calipers", but calipers must fit the thickness and the diameter of the rotors, and does a Series III Land Rover even have calipers?

 

[brian_]

Questions unaswered:

• Weight baring capacity electric motors..

The listing has reasonably complete motor specs, but no information (beyond the dimensioned drawing) about the mechanical specifications. Hub and bearing load capacities are significant considerations, especially since these hub-motor units are intended for a very light car and the proposed project is heavier and has large tires (which increase bearing loads when the vehicle is cornering).

 

[brian_]

Questions unaswered:

• ...
• ...
• How much power do we need to have a car that can do 80km/h and have a decent acceleration? 20kw? 40kw?

To just maintain 80 km/h the vehicle will need at least 15 kW, but to accelerate to that speed in any reasonable time will need much more.

Another concern is power available at low speed. Power is the product of torque and speed, so less power is needed at lower speed for the rate of acceleration or grade climbing ability; for starting off from a standstill, you only need to consider torque to the wheels at zero motor speed.

A normal EV has gearing with a substantial speed reduction ratio between the motor and the wheels (for example, about 8:1 for a Nissan Leaf and 10:1 or more for a Tesla), and the speed reduction ratio is also the torque multiplication ratio. So the 320 N⋅m motor output of a Nissan Leaf is multiplied by 8 to be about 2500 N⋅m at the wheels. These hub-motors are specified at "about 350N⋅m" peak, so 700 N⋅m for two or 1400 N⋅m for four... and that's only briefly before the motor overheats and the controller must reduce current and torque. These motors look just adequate for a small car, and that's the suggested application, but a Land Rover is unlikely to be acceptable with them.

 

[remy_martian]

Brian's already listed a few major concerns, like weight capacity of the bearings and structure.

Those brakes are too tiny for a LR and would never pass an inspection/stopping_test at motorway speeds.

When the Chinese say "car", they refer to golf carts and NEVs. 10-20mph stuff for old people in resorts or for use inside factories.

That 8kW is peak motor power, and they usually round UP optimistically in my observation...I'm guessing you'd be lucky to see 2kW continuous from an air cooled hub motor like those, if even that much from them, and with their amateur-hour direct connection of brake rotors to the motor case, you might completely shut the motor down after one high speed stop on a full battery (no regen possible) due to motor overheat.

Use of these motors is epic fail in the making, imo, but if you do decide to proceed, please report the build and testing results here. I love being corrected or put in my place with facts...part of learning. Call me arrogant, but I seriously doubt this will get you on a motorway and your range will be limited by motor overheat to maybe getting around the block.