Catapult and Trebuchet Entries at the Last Fling Pumpkin Sling

All machines – catapults or trebechets – will need to be strictly mechanical – no engines, hydrolics, compressed air etc. Click here to download the rules.

Also, for teachers, check out this sample curriculum from Sean Mc Geough Engineering Academy Instructor, SkillsUSA Advisor, Warren County Technical High School. His class build a small one last year, and are in the process of building a much larger one currently.

 

Why Do We Sling Pumpkins?

Careers and subjects surrounding STEM (Science, Technology, Engineering, and Math) are in high necessity and it is important for the youth of today to be exposed to these subjects early to develop interest. The Pumpkin Sling contest allows participants to use STEM knowledge in a fun and competitive way. By building catapults to fling pumpkins, participants will be using a variety of physics and mathematics including: linear kinematics, projectile motion, trigonometry, and engineering physics. To reach maximum distance, participants will have to calculate the degree at which their catapult will fire.

Participants will encounter specific problems with their catapult. The pumpkin may reach maximum height without any distance or be fired into the ground. By troubleshooting and calculating, they will find the perfect median between range and height to make their pumpkin go the furthest distance. Along the way they will learn to construct their catapults to their own design involving the important quality of an engineer: designing and drafting. The Pumpkin Sling contest allows participants to use STEM in an interesting way in order to get people involved in the STEM subjects and careers.

 

Punkin Chunkin Sanctioned

We are a Punkin Chunkin Sanctioned Event.

 

Machines & Categories

Prizes will be awarded in each class for each category

The machine can be of any design as long as it is constructed of materials rated for the weights or stresses that will be put on them, and that Each entry will be inspected prior to the competition by a safety team, which will determine compliance with the guidelines. No internal combustion engines, compressed gas, steam, hydraulics or ignitable substances may be used in any way. All energy used to cock the machine must come from the team members or a battery, in the case of an electric winch. Mechanical winches, block and tackle, and other such devices are permitted to provide mechanical advantage if the machine is cocked by the team members.

Machines must be loaded and released by youths between the ages of 11 and 17, with adult supervision.

Youth Trebuchet – Short Arm

1. All energy used to launch the p energy stored in an elevated mass.

2. A mechanical device such as a block and ta machine. Electric winches are also permitted.

3. The throwing arm may have a maximum length of 6 feet. This length is measured from the center of arm’s rotational axis to the point where the fixed sling line attaches to the arm. In the case of a machine without a sling, arm length is measured from the rotational axis to the center of the projectile in the ready to launch position. In the case of a floating arm machine or other design variant, the rotational axis that yields the longest arm measurement will apply.

4. Machines must conform to all General and Safety rules.

Youth Trebuchet – Long Arm

Same as for Youth Trebuchet - Short Arm except that there is no restriction on arm length.

Youth Catapult – Short Arm

1. All or some of theballistae.

2. A mechanical device such as a block and ta machine. Electric winches are also permitted.

3. The throwing arm may from the center of arm’s rotational axis to the point where the fixed sling line attaches to the arm. In the case of a floating arm machine, the rotational axis that yields the longest arm measurement will apply. In the case of a machine without a sling, arm length is measured from the rotational axis to the center of the projectile in the ready to launch position.

4. Machines must conform to all General and Safety rules.

Youth Catapult – Long Arm

1. Same as for Youth Catapult - Short Arm, except that there is no restriction on arm length.

punkin chunkin sanctioned event

We are proud to be a Punkin Chunkin Sanctioned Event

 

 

If you are looking for some plans, here are a few links

www.realtrebuchetplans.com

www.learntobuildcatapults.com

http://www.shoshone.k12.id.us/medieval/blueprin.htm

diycatapults.com/catapult-plans-menu?page=shop.product_details&flypage=flypage.tpl&product_id=1&category_id=1

 

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