Roller
This bot is my first experiment with flexible solar cells. Although not as efficient as the cells used in most BEAM bots, the flexibility of these cells allows for some novel bot configurations.
The bot is a simple solar roller, driven by a Miller solar engine. The arm is attached to the spindle of an efficient gear motor, and there’s a 0.047F storage capacitor inside. The flexible solar cell is wrapped around two toy wheels, one of which has its center removed for the motor. The goofy rubber tires fit over the ends. You can see the bot’s innards here.
In full sunlight, this bot fires every few seconds, which more often than I thought it would given that only a proportion of the cell is getting direct light. It can also clamber over low obstacles.