OK so I am going to go with the fire-fighting idea. I do not have an actual concept sketch yet so I am going to try and explain my idea. The basic job of the robot is to perform the dangerous parts of fire-fighting and to do the task more effeciently than humans would have. The robot will be able to safely navigate itself to the scene of the fire, connect to local water sources(fire hydrants, lakes, etc.), suppress the fire, and save anyone inside.My robot will be very large( about the width of the street and slightly longer than a normal firetruck). It will appear very much like a normal truck while driving with the exception of the hoses and large tanks mounted on the back of it (while keeping this concept as original as possible I am also trying to achieve some sense of practicallity as you would never see a 3 story humanoid style robot trying to fight a fire
lol). The bot will have 6 large tires enabling it to navigate both roads and difficult terrain. Upon reaching the scene of the fire the truck will transform to its fire-fighting mode. The truck will first stop, then all 6 wheels will turn 90 degrees so that they lie flat on the street/ground and give the robot enough traction to counter the force that will later be created from the water cannon. Then the large water cannon will raise out of the back/top of the truck. As this is happening, a small scout connected to a hose will disconnect from either side of the truck. These scouts will then navigate themselves to the nearest water source(most likely a fire hydrant) and connect, giving the robot more water. Then the large turbine mounted between the cannon and the two large pressurized tanks on the truck will start. This turbine will be what propels the water out of the cannon. The cannon will activate and water will fly from it and onto the burning building. When the cannon begins firing the front of the truck will actually seperate from the main truck body. This will form the rescue pod and will contain the human firefighters inside. This rescue pod will be equipped with its own small tank for clearing a pathway through the fire for it to navigate. It will also have two large robotic arms that are controlled by the firefighters from inside the pod. The arms will be able to safely clear a pathway. The firefighters will be able to use this pod to clear debris, rescue anyone inside, and put out nearby fire with much more safety.
I know that this is a very long and confusing explanation but it will make much more sense when I show concepts(which I plan to do soon!). I am really trying to let my imagination loose on this one so there are sure to be plenty of crazy gadgets on this thing. As long as I can keep it original and do my best I know I will be happy. Please give any C & C you can if you can decipher my description. Concepts coming soon!