Notes

• A GSE system should be capable of the following:
  • Control the flow or N2O into the oxidizer tank.
  • Provide the signal for engine ignition
  • Safe mode the vehicle by rapidly dumping N2O from the vehicle via the nozzle without ignition (purge system, accomplished with CO2)
• Receiver only needed on GSE, not on rocket (electrical quick disconnect)
  • Electrical quick disconnect routed along N2O line
  • Pressure from fluid quick disconnect forces electrical connector apart
• Ignition sequence:
  • Igniter first, then open engine valves
  • Manually timed (RC transceiver channels)
    
• Electrical system completely independent from rocket/avionics electrical power
  • 12V battery within GSE enclosure
  • Electrical quick disconnect leading to vehicle servos
  • Servos, transceiver run off of regulated 5VDC

Polaris GSE Components

• Nitrous feed system
  • Connects to N2O tank via CGA 326 connection
  • Pressure gauge to measure pressure
  • Check valve to prevent contamination
  • Servo actuated ball valve
• Purge system
  • Connects to CO2 tank via push-to-connect
  • Servo actuated ball valve
• Fill system connection
  • Connects the rocket to both Nitrous feed system and Purge system
• RC Transceiver
  • Allows for control of Servo actuated ball valves (in GSE and on rocket)
  • Accepts regulated 5V from power supply
  • CH1: Igniter relay
  • CH2: Nitrous fill valve
  • CH3: Vehicle nitrous valve
  • CH4: Vehicle ethanol valve
  • CH5: Purge valve
  • CH6: unused
• Power supply
  • 12V car battery, used for powering igniter on rocket
  • Regulated down to 5V for use with servos and RC Transceiver
• Relay
  • Controls 12V battery power via 5V signal sent by RC Transceiver
  • Connected to igniter on rocket to allow remote ignition
• Enclosure
  • Steel toolbox with holes drilled for fluid and electrical connection
• Electrical quick disconnect
  • Four wires: Power (+5V), Ground, Nitrous valve servo and Ethanol valve servo
  • Header pin connector placed on fluid quick disconnect
  • Fluid pressure from quick disconnect forces header pins apart on launch

Electrical Diagram

Model

Bill of Materials