I wanted to experiment on the mechanism I sketched earlier; tube, elastic band and arrow.
I found myself a small notepad with hard covers and a big red spring.
This was the right equipment for the role of bow.
I then got myself an elastic band and tied on to each sides of the spring.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjUTAl1UlQ3eqaURC7edhHTPRiCm6UOphYSqhDTsjhCnV0QdyphzcKfC3DSZEXCn3QdJfPQh7A1FzskQBeLsIeXNTrcpPoK_NUq1mA9o-06KHMMadPXbVEAPp3zareklb7N6KvBPmtlyCw/s400/SDC11587.jpg)
I decided to use magnets to avoid arrows falling down from the bag.
Then I will stick a small metal piece on the end of the arrow.
▼ Just like the photograph below.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi3UpBCusNSHuYz-OspKdyQ5BYqGdzOOAy92_GazX87QKrSmZjW2QndbMPf6RD6obdLY46uWKbxp8JbIzlyBcUtHkUqK-5J8mKTUuXdzTu_45Cl79Fs3oTCuOWi0wL3wjqZ41T0ZN1ta9Y/s400/SDC11589.jpg)
I had a great help with making the tubes in the workshop.
Foundation students weren't allowed with some machines unless we had the metal induction.
However, a technitian taught me how to use it and I got a permission to use the machine by myself. It was really fun learning a new machine.