Two videos that demonstrate working capacity and tractive efficiency
The 3 chisels plow at 10cm depth. This is deeper than needed for weeding, but good in order to estimate machine capacity.
The model is powered by 2 solar panels of 130 Watt nominal output each.
It is March, and it is partially cloudy, so expect no more than 200 Watt of total power.
The cogwheel travels 220 cm along the chain.
Of that, 10 to 20 cm are lost when placing the anchors, so a little more than 200 cm is tilled for each alternating motion.
An alternating motion takes about 20 seconds, so the overall speed is 3 meters per minute, 180 meters per hour.
Of the 20 seconds, about 1 second is spent on reversing the motor directon and 1.5 second on placing the anchors. While placing the anchors, the anchors move backwards up to 5 cm, while the opposite chisels move forward some 10 cm. We conclude that these 5 cm of backward motion indicate that tractive efficiency is better than 97%. Compare this to the tractive efficiency of a wheeled tractor, which is 70% .
If this machine is used for seedbed preparation, without crop, and with the three chisels placed 15cm apart, field capacity would be 0.8 hectars (2 acres) per hour.
