27:33

Building a DIY submarine

13:39

Building an Advanced Magnus Effect Plane

17:30

Worlds smallest micro RC Submarine!

15:35

Will this toy engine work at full size? (yes)

17:14

Building the FASTEST Slot Car

7:27

Building a Lego-powered Submarine 4.0 - automatic depth control

9:13

RC Car to Ground Effect Vehicle Conversion

13:01

Building a DIY Battleship