Bradford ECAPS's 1N HPGP Thruster is designed for attitude and orbit control of small-sized satellites. With 46 1N HPGP thrusters having been demonstrated to date aboard the PRISMA spacecraft and the SkySat series, the 1N HPGP is our most heritage line of thrusters and most popular with small to medium sized spacecraft, up to 750 kg. The high performance and non-toxicity is highly prized by developers of agile and responsive spacecraft and particularly suited for the fast-paced NewSpace industry.

  • Non-toxic propellant makes for easier and less costly integration on secondary or ‘piggy-back’ missions.
  • Propellant loading is simple, fast and avoids the cost associated with loading hydrazine. Allows the operator to spend less time on ground operations and more time on space operations.
  • ‘Fuel at the factory’ – be ready for launch vehicle integration upon arrival at the launch pad.
  • Higher performance over hydrazine allows for more payload or longer mission durations.
  • Allows for more secondary or ‘piggy-back’ launch opportunities, especially missions where there is concern about the hazards of hydrazine and its risks to the primary payload.
  • Allows for more capable missions than spacecraft without propulsion.
  • Allows for more agile mission profiles than electric propulsion. Spacecraft take significantly less time to execute maneuvers and orbit changes.

The 1N HPGP thrusters can be provided individually or as an integrated system. For instance, each SkySat propulsion system consisted of four 1N HPGP thrusters along with tanks, flow regulators and other avionics. Get in contact today to talk to us about all our small sat solutions!

Specifications Table

Thruster Type HPGP
Propellant LMP-103S
Thrust Class 1 N
Primary Operational Mode RCS + Δ ∨
Inlet Pressure Range 4.5 - 22 Bar
Thrust Range .25 - 1 N
Nozzle Expansion Ratio 100:1
Steady State ISP (vacuum) Typical 2000 - 2270 Ns/Kg
(204 - 231 s)
Density Impulse (vacuum) 2480 - 2815 Ns/L
Minimum Impulse Bit ≤ 70 mNs
Overall Length 178 MM
Mass 0.38 KG
FCV Type Solenoid
- No of Seats Dual Seat
- Pull-in Voltage 28 ± 4 VDC
- Holding Voltage 10 ± 1 VCD
- Coil Resistance (each coil) 190 Ω
Nominal Reactor Pre-heating Voltage 28 VDC
Regulated Reactor Ore-heating Power 8 - 10 W
Target Life - Qual. Level  
Pulses 60,000
Propellant Throughput 24kg
Longest Continues Firing 45 minutes
Accumulated Firing Time 25 hours
Firing Sequences 1500
Demonstrated Life  
Pulses 60,000
Propellant Throughput 24 kg
Longest Continues Firing Time 1.5 hours
Accumulated Firing Time 25 hours
Firing Sequences 1500
Maturation Level TRL 9
Current Status  
  Space Qualified: 12 Systems and 46 Thrusters In-orbit