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The floating arm trebuchet uses a counterweight held on top of treubchet tall drop channel to transfer potential energy into kinetic energy. While this is happening, the wheel is moved backwards by the torque acting on the arm from the counterweight. 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.
Reducing the drop distance of the planw axle to the glide track would reduce damage, but also reduce the range of the trebuchet. Retrieved November 15, In larger designs, the trigger system is applied at the top of the drop channel. Large scale designs require special trigger mechanisms that can hold the weight of the throwing arm.
Floating arm trebuchet – Wikipedia
To reduce friction of the sling on the launch track, the track should have a smooth surface. This page was last edited on 5 Aprilat Retrieved November 13, This linear drop of the counterweight is more efficient in transferring potential energy to kinetic energy than the pendulum counterweight motion of floatiny traditional trebuchet.
In contrast, a floating arm trebuchet features an axle on the arm freely moving along a horizontal glide track. A floating arm trebuchet has three points of contact where friction can interfere with efficiency. Trebichet Floating Arm Trebuchet is a counterweight siege weapon floafing is a modern variation  of the medieval trebuchet.
A traditional trebuchet, which is simple to engineer, consists of an arm resting off-centre on an axle with a hinged counterweight at the short end of the arm. 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.
Floating arm trebuchet
To reset the device, the counterweight must be raised back to the original height and locked in with the trigger mechanism. Their defining feature is free movement of an axle on the throwing arm,  and a linear drop channel for the counterweight. 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.
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. However, a floating arm trebuchet is more efficient when built to a size of between one meter and five meters,  making it suitable for hobbyists and model builders. Kids Learn by Making Stuff. Upon releasing the trigger, the counterweight is allowed to drop through the channel.
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.
The most common of several trigger mechanisms is two eye bolts and a peg through both bolts. Five Machines That Changed the World.
The design and construction of such machines is a popular project assignment in post-secondary engineering classes. A regular trebuchet is a better realistic war machine.
Floating arm trebuchet by Freddy Moreno on Prezi