Swinging fixed weight trebuchet

The first five data points on the graph look like the beginnings of a bell curve, but the velocities do not remain constant in the second half of the graph. There will also come a point where increasing the weight of the counterweight will do no good other than putting extra strain on the trebuchet. When laying siege to a wall or castle stone or lead balls of the same caliber weight and size were used. There have been many trebuchet designs that used ratios closer to 4: Bibliography Up Carreiro, Paul.

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Designing a Trebuchet – Optimizing Weight and Length

One can change this release angle by adjusting the angle of the holding pin at the end of the lever arm. There's not much instruction here, it was just nice to see how the project was progressing. These long lengths of the base are 3 2x6's wide aka, essentially invincible. Remember to keep the release angle so that it releases at 45 degrees from the ground for maximum range. Their theories are then applied to human-scale projects to bring people new technologies, like computers, lasers, and fusion energy. The mechanics and action of a trebuchet appear to be simple; but they are actually quite complex and involved.

Trebuchet lab report final by Lunamoon - issuu

The first attempt to launch one of them resulted in the trebuchet's counterweight tearing loose from the throwing arm. You will see later that this caused a clearance issue between the counterweight and the base of the frame. International Orders Click Here. This board will allow the sling and projectile to smoothly move over the frame. The mains parts are, frame, couterweight, beam, sling and guide chute. Mechanical Properties of Wood. They were powered by men pulling on ropes that were connected to the end of a swinging arm.
So, if you are in the business of designing trebuchets for medieval kings, you should pay attention to this design parameter. One end of the sling is permanently fixed near the long end of the lever, and the other end has a loop or metal ring which is simply slipped over the pin. Increasing the ratio increases the launch velocity of the projectile, but it also means the counterweight must be much larger to provide the necessary force. It consists of two primary support beams, attached to the base, and ancillary support structures for added strength and durability. The projectile undergoes a swinging motion and is released at some suitable position along its trajectory. Home Videos Podcasts Resources. A free or hinged counterweight provides a swinging bucket that allows the weight to fall more vertically and thus is more efficient in converting that vertical motion into the rotational motion of the throw see photo.

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