Above is the unique & elaborate circuit designed by Gary Ensmenger for the Bigfoot Water Rocket Launcher System. Below is how it works, and why it is superior in performance, SAFER, and more versitile, than any other water rocket launcher.

To set up the launcher:
(1) "Abort Valve" must start in off position.
(2) "Water Rocket" is locked down over the "Launch Tube" with the Bigfoot Trigger Mechanism, sealing the "Launch Tube" and "Water Rocket" together.

Adding Water can be done as least TWO different ways, either through the launcher conduit or directly to rocket:
(3) Turn "Water Valve" into ON position. Water will flow through a garden hose source and through the conduit and into the rocket. When water level is at desired height inside rocket, turn "Water Valve" to OFF position . Another advantage to this method is that the water rocket will gain air pressure from the pressure in the water hose. If you will be using a manual air pump, this means that some of the manual work will already be done for you.
(4) the alternative method, in the absence of a garden hose, pour water directly inside Water Rocket, BEFORE (step #2 above), then proceed to step #2, and skip to step #6 below.
(5) another creative alternative method would be to have an external portable pressurized water tank connected to the "water input". The external tank could have a premeasured amount to water, which will be required by one water rocket. Or, an external tank could contain much more water for many launches.

Adding Air Pressure can be done as least TWO different ways, either through the launcher conduit or directly to rocket:
(6) Add air pressure through "Air Input", usually with either (1) manual tire air pump, or an (2) electric/gas air compressor. Watch "Pressure Gauge", fill any pressure up to maximum 100 p.s.i. Launch when ready.
(7) the alternative method, mostly because of the presence of Dry Ice Pellets, is to pour 1 or 2 ounces (about 3 inches long) of Dry Ice Pellets directly inside Water Rocket, BEFORE (step #2 above), then proceed to step #2, and step #3. Launch immediately when pressure reaches desired pressures up to maximum of 100 p.s.i. If you fail to launch in a timely manner, and the dry ice is still creating pressure, the Bigfoot Launcher will safely release pressure at 115 p.s.i. to prevent the water rocket from bursting.