Considering how short the battery lifespan (or gas tank) of these RC devices are when in use, I don't think the battery consumption of the iPhone is going to ca

Considering how short the battery lifespan (or gas tank) of these RC devices are when in use, I don't think the battery consumption of the iPhone is going to cause any problems. The only issue I'm seeing is control. I'm pretty sure it's harder to be accurate with an iPhone than with a radio control, especially for such things as helicopters.