The team must design their own water rocket (minimum 2) and launch pads with safety. Commercial water rocket kits and launch pads won’t be allowed. Following specifications and rules address many well-known safety issues of water rockets, but are not expected to cover all design possibilities.
Rocket Material:
- The weight of empty rocket with empty fuel tank must not exceed 0.5 kg (11 Pounds)
- The maximum allowed total height of the rocket is 76.0 cm.
- The rocket shall be made of low-density materials such as paper, plastic, duct tape, and glue. Use of Metal, ceramics, and other high-density materials are prohibited.
Rocket Nose Shape
While a sharper nose improves aerodynamics and accuracy, for safety the nose must be somewhat rounded and made of a soft, flexible material. The nose must definitely not form a sharp, hard point. It should not break a windshield or injure anyone
Fuel Tank
- The water-fuel tank must be a plastic soda-bottle, not a water bottle, with a maximum size of 2.5 liters. A soda bottle makes an ideal fuel tank for a water rocket; the bottle should be strong, light-weight, and designed to be pressurized.
- The rocket fuel must be water, driven by pressurized air to produce thrust. Water and air are non-toxic and non-combustible, and readily available. Air pressure must not exceed 70 psi, roughly 1/2 of the burst pressure of soda-bottles.
Launch Pad
The Launch pad must be of sufficiently sturdy construction to ensure a repeatable, predictable launch direction. The pad may optionally include a blast shield that disperses the rocket exhaust, a high velocity column of water, into a harmless spray, to protect participants and spectators and to prevent mud splatter from the dirt surface of the infield.