Trebuchet Competition

Rules for Trebuchet Competition 

(Large and Small Class)


The trebuchet competition shall be comprised of siege engines from the trebuchet class only. The competition shall have two classes, large and small, as described below.

General Regulations

  1. All trebuchets shall be constructed of period materials.
  2. Trebuchets constructed out of PVC, HDPE, steel, gluelam, or other materials shall be excluded from competition.
  3. All trebuchets shall be free standing.
  4. All trebuchets shall have a firing mechanism that will allow for remote firing. Firing mechanisms may include eye bolts and a pin, lobster claw shackle, or similar devices.  Large Class shall be fired from a minimum distance of 4 feet and Small Class from a distance of 2 feet. 
  5. All trebuchets shall generally conform to historical counter-weight trebuchets.
  6. Store bought kits shall be excluded from competition.


 

Counter-weight Trebuchet from The Romance of Alexander (circa 1330.)

Figure 1. Counter-weight Trebuchet from The Romance of Alexander (circa 1330.) 

Large Class Dimensions and Projectile

  1. The overall length of the large class trebuchet shall not exceed 4 feet.
  2. The overall height of the large class trebuchet shall not exceed 4 feet.
  3. The overall width of the large class trebuchet shall not exceed 4 feet.
  4. The arm of the trebuchet shall not protrude more than 1 foot from the base of the trebuchet when in the cocked position.
  5. The sling shall be capable of launching a sphere having a weight of approximately 5 ounces and a diameter of 3 inches.
  6. The counter-weight shall be adjustable.

Small Class Dimensions and Projectile

  1. The overall length of the small class trebuchet shall not exceed 2 feet.
  2. The overall height of the small class trebuchet shall not exceed 2 feet.
  3. The overall width of the small class trebuchet shall not exceed 2 feet.
  4. The arm of the trebuchet shall not protrude more than 6 inches from the base of the trebuchet when in the cocked position.
  5. The sling shall be capable of launching a sphere having a weight of approximately 1.62 ounces and a diameter of 1.68 inches.
  6. The counter-weight shall be adjustable.

Competition Rules

Contestants shall compete in two age groups: Youth (ages 15 and younger) and Adult (ages 16 and older).  The Youth age group shall be accompanied by an adult, however construction and firing shall be performed by the youth contestants. The competition shall be as follows:


  1. The trebuchet shall be inspected for safety prior to competing. If the trebuchet is found to be unsafe, the contestant shall be given ½ hour to make their trebuchet safe.
  2. The contestant shall place their trebuchet at the siege line (a predetermined location on the field.) The contestant may not move their trebuchet from the siege line for the duration of the competition for fear of being killed if it were moved forward into the range of the defending castle, or being called craven if it retreated.
  3. The contestant shall have ½ hour and be given 5 attempts to range their trebuchet at the besieged castle (a predetermined target between)
    1. 20 and 30 yards away for Large Class
    2. 10 and 20 yards away for Small Class
  4. After ranging, the contestants shall be given 3 attempts to breach the castle (hit the predetermined target.) The distance of the 3 projectiles, from the castle to the initial impact, shall be averaged and used as the contestant’s score.

Scoring

Contestants shall be scored as follows:


Documentation and Design

1-10 points

Accuracy

1-10 points

Originality of firing crew

1-10 points


For a maximum of 30 points.




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Markesa Manuel de Carvalhal,
Jun 11, 2012, 7:10 PM