How to Make a bow drill

There are various tools to be made and a number of items to be used during a disaster. One can utilize the wood logs for firewood. A bow drill can be made by just crafting the ends of a long wooden stick into necks so that plastic wires can be notched and it can be used made into a bow. Any stone with holes can be used as a notch. This notch holds the end of the bow drill. The wire of the bow drill can be wrapped in a stick and then vigorous forward and backward movement of the bow drill around the stick will create such temperature that the powder getting drilled out of the wood in the notch would start to burn. This powder when put with a mound of soft tender bark, and air is puffed into it, it catches fire. So bow drill can be used as a tool to make fire.