The document describes the design of a trebuchet made of PVC pipes. It has a 0.4m x 0.4m base with vertical and diagonal pipes connecting to form a triangular frame. A horizontal bar connects the top of the vertical pipes, and diagonal pipes form a 45 degree angle. A swinging launching arm and sling are attached, with the sling being 0.3m long. A 2.5kg weight is included.

2. Our Design
We used PVC pipes with a diameter of ¾ inches.
We started out by designing a base – .4 meters by .4
meters
.4 meters

3. Then, we built up – adding two .4 meter pipes upwards
from the two front corners, and two small pieces of PVC
pipe on the back to corners to support the diagonal .4
meter pipes.
.4 meters
.4 meters

4. We then added a horizontal bar to connect the two tall
pipes that was also .4 meters, and two diagonal .4 meter
pipes to connect the top of the tall vertical pipes with
the shorter vertical pipes. This diagonal piece created a
45 degree angle with the horizontal.
.4 meters
.4 meters

5. We then attached the launching arm, which swings from
a 1-inch PVC pipe connector attached to the top
horizontal piece of our trebuchet. We used 1-inch pipe
for the launching arm. The short arm is .2 m and the
long arm is .36 m.
.4 meters

6. Then we attached a sling for the projectile, the
weight, and a device to hold our trebuchet in a cocked
position.
The length of our sling was .3 meters.
Our weight was 2.5 kg
.3 meters
Sling
Device
Weight
(2.5 kg)
.4 meters

7. We also put sand in the base of our trebuchet so the PVC
pipe wouldn’t be so light and would not be thrown up
by the power of the release of the weight.