Manual
1
105 Webster St. Hanover Massachusetts 02339 Tel. 781 878 1512 Fax 781 878 6708 www.gearseds.com
Copyright GEARS Educational Systems 2005
Totally Trebuchet Construction Guide
An Illustrated Assembly Manual
Organize the Tools and Materials
The trebuchet can be assembled with minimal frustration by taking the time to read through the
directions. Prepare the necessary tools and materials before beginning the assembly.
Required Tools
Safety Glasses
#2 Phillips Head Screwdriver
5/16” Combination Wrench
3/8” Combination Wrench
Needle nose pliers
5/64, 5/32, 1/8 Allen Wrenches or Hex Keys
Dial Calipers (Optional)
25’ – 100’ Tape Measures
12” Rule
1/16” drill bit and drill
Materials
Refer to the end of this text for an illustrated parts catalog.
Structural Metal Components
Qty.
1 6x9 Flat Plate
4 13 Hole Angles
2 7 Hole Angles
2 11 Hole Flat Bars
2 7 Hole Flat Bars
2 Sine Triangles
4 90 Degree Fish Plates
1 180 Degree Fish Plate
Machined Parts
Qty.
1 3” Hex Wheel
1 4” x 3/16 Axle
1 1-1/2” x 3/16 Axle
1 7/16” x 3/16” bore Hex Adapter
1 ½” Shaft Collar
8 3/16” Shaft Collars
1 Mast Holder
Hardware
Qty.
22 #10-24 x 3/8” PH Machine Screws
3 #10-24 x ½” PH Machine Screws
2 #10-24 x ¾ PH Machine Screws
4 #10-24x ¾” Coupling nuts (standoffs)
16 #10-24 Hex Nuts
25 #10 Flat Washers
25 #10 Split Ring Lock Washers
4 #10 Fender Washers
4 #10-24 x 5/16” PH Screws (Mast Holder)
Miscellaneous Supplies and Materials
Qty.
1 9.8 Ounce Steel Ball
2 Wood Balls, 1” Diameter
1 Wood Balls 1-1/4” Diameter
1 Wood Balls 1-1/2” Diameter
10’ Fishing Line
1’ 1/16” Welding Rod
2 18”x 5/16” Dowels
2 Zip Ties