[Andy A.]

A standard servo, like the one allowed to us in the rule book, is rated as 42 ounce inches of torque.

Honestly, I don't know how they measure it. I am assuming that it is a stall torque at a nominal 5 volts on the output shaft. Adding linkage can increase this, however as Al said, these guys are all plastic (either nylon or delrin). You can also gang two or more servos together on the same task. As some have stated, it can and is being done, but requires a little bit of thought. Easier methods, like using a full size motor or pneumatics come with a weight and complexity penalty, but this is one of those instances where overkill is good for a FIRST robot.

Just a caution- Servos are run off the backup battery. Not only will a low battery inhibit proper camera function, it will weaken servos to. I've found the effect to be pretty profound on R/C cars. When your voltage drops below a certain level, servos become just about worthless. If you depend on servos and the camera, consider opting for a larger backup battery. There is a weight penalty, but it will likely be worth the extra capacity to you.

-Andy A.