When i was looking for a good set of plans for a floating arm trebuchet, i couldn’t find a single free one. I know that a lot of people share my frustration in not. This is the floating arm trebuchet with a sling. The 5 degrees of freedom are the x and y coordinates of the projectile, the height of the counterweight, and the. How to Simulate a Trebuchet Part 3: The Floating-Arm Trebuchet. The illustration above gives a diagram of a “floating-arm” trebuchet. The floating-arm type is.
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The floating arm trebuchet loses the range advantage over regular trebuchet at very large scales, because the difficulty in construction of the drop channel and axle increases with size.
A floating arm trebuchet has three points of contact where friction can interfere with efficiency. Technology on Your Time. The design and construction of such machines is a popular project assignment in post-secondary engineering classes. Kids Learn by Making Stuff. Friction when the counterweight is dropping down to the glide strike can be reduced by using silicone grease or a thin film of plastic on the drop channel.
Perdue 15 November The Floating Arm Trebuchet is a counterweight siege weapon which is a modern variation  of the medieval trebuchet.
While the floating arm design can have a lighter frame than a traditional trebuchet because the overall forces produces are less,  the impact of the arm on the glide track will cause eventual damage and may need maintenance. However, a floating arm trebuchet is more efficient when built to a size of between one meter and five meters,  making it suitable folating hobbyists and model builders.
The arm is on a moving axle floqting the torque acts on the entire structure, preventing stalling. Their defining feature is free movement of an axle on the throwing arm,  and a linear drop channel for the counterweight.
Large scale designs require special trigger mechanisms that can hold the weight of the throwing arm. Five Machines That Changed the World.
This linear drop of the counterweight is more efficient in transferring potential energy to kinetic energy than the pendulum counterweight motion of a traditional trebuchet. This page was last edited on 5 Aprilat The sling or pouch, which contributes to acceleration of the projectile and then releases it at the desired launch angle, is often made using polyester rope or other durable thin material.
Floating arm trebuchet
The most common of several trigger mechanisms is two eye bolts and a frebuchet through both bolts. From Wikipedia, the free encyclopedia.
Upon releasing the trigger, the counterweight is ar to drop through the channel. In contrast, a floating arm trebuchet features an axle on the arm freely moving along a horizontal glide track.
Retrieved November 15, To reduce friction of the sling on the launch track, the track should have a smooth surface.
Reducing the drop distance of the wheel axle to the glide track would reduce damage, but also reduce the range of the trebuchet. Views Read Edit View history. The dropping of the counterweight forces the arm to swing to one side of the glide track and quickly jerk in the opposite direction to launch a projectile.
The 5DOF Floating Arm Trebuchet
To reset the device, the counterweight must be raised back to the original height and locked in floatinh the trigger mechanism.
Retrieved from ” https: Retrieved November 13, While this is happening, the wheel is moved backwards by the torque acting on the arm from the counterweight. A regular trebuchet is a better realistic war machine. In larger designs, the trigger system is applied at the top of the drop channel. The floating arm trebuchet uses a counterweight held on top of a tall drop channel to transfer potential energy into kinetic energy. The release mechanism is a hook with a specific bend in its tip to determine when centripetal force will release one end of the sling, freeing the projectile to continue on its path.