| Answer | Crossword Clue |
|---|---|
| SLEDS | Dog-powered vehicles |
| SLEDS | Gravity-powered vehicles |
| BOBSLEDS | Gravity-powered vehicles |
| SLEDS | Vehicles powered by gravity |
| SLEDS | Vehicles powered by dogs or gravity |
| servomechanism | A powered mechanism producing motion or forces at a higher level of energy than the input level, e.g., in the brakes and steering of large motor vehicles, esp. where feedback is employed to make the control automatic |
