mounted on a stock. The crossbow was invented by Mr. Ch'in of Ch'ue Ch'in, in east Asia
during the (jo) Zhou dynasty, around the year 700 BCE. We made a more advanced version of
the crossbow that was used during the Qin Dynasty which lasted from 221 BCE-207 BCE. This
model includes a locking lever, a sear, and a trigger. The crossbow was invented to make the
marksman role easier, and making bowmen not need as much experience, strength, and skill.
It was the first simple, and cheap projectile launcher, that was still used when guns were
invented for its silent firing. The crossbow was an effective weapon that lasted a very long
period of time in history. We used a buzz saw to shape the stock of our crossbow, and laser
cut the firing mechanisms. For strength, we cut two planks of ply wood and connected them
with wood glue and screws. To make our crossbow "pretty" we used an electric sander,
dremle tool, and a planer. We attached two trigger mechanisms for more strength, using wood
glue. To create the housing for the firing mechanism, we used a drill and a dremle tool. We
created the bow using the same technique that we used to make the stock. We proceeded to
attach the bow to the stock at an 84* angle so that the string would not pass over the bolt.
Instead, the string would hit the bolt as intended. Our first model for the trigger mechanism
was called mechanism 1.0. Unlike mechanism 2.0, 1.0 didn't work, of course. The corner piece
on the sear was too sharp and did not turn properly. This caused problems when pulling the
locking lever down, in other words the string would not get released so it could not fire.
I'm going to tell you about the tools we used. We started with a buzz saw. We used it to cut
the large pieces of wood. A buzz saw is a handheld electric saw with a round blade that spins
at very high speeds. We then used a jigsaw. We used a jigsaw to cut the smaller more precise
cuts. A jigsaw is a small handheld saw that is slower but more precise tool that works by
having a small toothed blade moving up and down rapidly. In addition to saws we also used a large verity of tools such as a hand planer. We used a hand planer to thin the bow. Thinning the bow added flex to the wood. A hand planer is a small tool with a flat adjustable blade in it. A hand planer works by cutting a thin section of the wood off at a time. This was hard work because using a hand planer involved moving it against the wood repeatedly. The next tool we used was a dremle tool. A dremle tool is a small handheld drill-like device that can have multiple tips for different purposes. Two of the tips that we used were the circular etching tip (for thinning, etching, and smoothing), and a the saw-like cutting tip (which of course was used to cut). These are just some of the tools that we used to create our crossbow.