My physics lessons being a bit far, could someone give the relation between:
- available torque on an engine in Nm
- weight of a load mounted on wheels in kg (neglecting the friction forces)
- acceleration generated in m / s
?
the information I found on a conventional drill / driver:
Speed: from 0 to 1250 rpm.
Torque: 45 Nm
The torque of a small car oscillates between 80 and 150 Nm So I would see 4 independent driving wheels each "equipped with a drill" and independent, all controlled by a single module for acceleration, etc ... It would a torque of 180 Nm in total with 4 drills.
With 30cm diameter wheels, and at 1250rpm it gives a theoretical speed of 70km / h, which is enough
The data on each motor: 20A under 12V.
Or 80A maximum simultaneously on the 4 wheels. By taking a 12v / 80Ah battery, it gives a theoretical autonomy of 70Km (80 A for one hour ==> 70km / hour) at maximum speed.
In practice, we can count on a good 50km
In addition, nothing prohibits the use of a small 4-stroke engine that runs on gas and runs a car alternator to provide current / recharge the battery.