| 1 | The wings are driven by a crankshaft that is connected to a gearbox. | |
| 2 | You might notice that the gear box looks like a little airplane. | |
| 3 | The RPG doesn' t require a separate generator, starter or gearbox. | |
| 4 | Doherty says: "There is no underwater generator, power electronics or gearbox underwater to go wrong. | |
| 5 | The two most important parts of this set are the gear box (shown above on the left) and the solar cell (shown on the right). |