Bab 164: Chapter 161 Guruluuuluu (Request for Monthly Pass)

"The Bow Drill Method requires several pieces of wood, a drill shaft, a fireboard, a bearing block, a hand-held stick, a length of string, and most importantly, some tinder to catch the flames, and then you use a knife or other sharp tool to process these raw materials."

Bi Fang, draped in a spare brown robe, searched through the bushes, picking up a tree branch he tested its hardness with his fingernail, only to find it unsuitable.

"The principle of the Bow Drill Method is the same as the Hand Drill Method, with a slightly more complex structure, because it replaces some of the manual effort with a device, converting elastic potential energy into kinetic energy, thereby achieving higher efficiency."

"So, when it comes to material selection, the bow drill is like the hand drill, I won't go into detail here."

The bushes were lush, and Bi Fang quickly found a suitable drill shaft from a tree five or six meters tall, with bunches of little red fruits hanging from its branches.