The design has the lithium batteries and thrusters at the rear so the pilot and passengers can enjoy the view. U-Boat Worx The three-person submersible has a “droplet-shaped hull,” according ...

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, ...