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Off the Shelf | Propulsion Units

Comet 8000

Overview

The Bradford Space Comet 8000 is a medium-thrust, medium-Isp thruster assembly optimized for orbital maintenance needs of satellites in the 50 to 150 kg range. It offers a simple way to add a strong propulsive capability to large Cubesats and microsats.

It integrates a pair of water tanks with a thruster assembly as well as all the needed control systems to yield a plug & play propulsion unit.

Using low-pressure water as its propellant allows it to be integrated, shipped, launched, and used safely and without onerous handling precautions.

Its impulsive thrust and low power needs means it can be used to maintain or change an orbit quickly, minimising disruptions to revenue-generating payload operations.

Comet was the first water thruster to fly back in 2018, and today has the largest number of units in space and years of accumulated use on-orbit.

Selected
Model Specification
ParameterComet 8000 Value
Operating Thrust
16 - 25 mN
Specific Impulse
> 165 s
Total Impulse
8348 Ns
Minimum Impulse Bit
< 50 mNs
Wet Mass
6675 g
Dimensions
44 x 30 x 18 cm
Preheating Time
10 minutes
Power Consumption
< 55 W
While thrusting
Input Voltages
8 - 34 V
Digital interface
RS485, RS422 or CAN
Choose on configuration
Command protocol
NSP v4
Operational temperature
-30 to +60 °C
Using built-in heaters to maintain tank temperature
Survival temperature
-15 to +60 °C
With extended temperature option
Key Advantages
  • Perfectly sized for spacecraft in the 25 to 250 kg range
  • Approved for use on all launch vehicles
  • More thrust with less power
  • Highly flexible interface
  • Integrated propellant management and control
  • In-flight programmable power consumption
  • Custom-located fill & drain ports...
  • ...or the unit can be supplied filled to avoid fuelling entirely
  • Built-in thermostatically regulated heaters
  • Electronics built to J-STD-001
  • All units acceptance tested according to GEVS standards

Used In

Umbra

Umbra

8/17/2024

Unknown Destination

Umbra 7 & 8

Umbra 7 & 8

11/11/2023

Low Earth Orbit

Black Sky

Black Sky

3/24/2023

Earth - LEO

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