It’s a bird, it’s a plane, it’s Super Sub! U-Boat Worx’s just-launched, ruby-red flagship may have more in common with the original 1950s Superman than the color of his cape. The Dutch ...

In short: 2 rotating spading machines in 1, including a subsoiler. – Photos: Bob Karsten Driving faster with a spading machine is possible, but increasing the rotor speed is not the right solution, ...