Theory - Spudnik IV The Spudnik IV will operate on the same principles as an automotive turbocharger. The combustion chamber will be pressurized with a mix of fuel and oxygen, held by the closed electric sprinkler valve. When the trigger is pressed, the control module activates the sprinkler valve, which causes it to open quickly. After a very small delay, the control module activates the ignition source and the distributor. As the fuel/air mixture expands and combusts, the six ignition points ensure a complete and rapid combustion. The result is more power and distance than a traditional gun of the same size.