The propulsion system's 16 monopropellant rocket engine thrusters, which control momentum and station-keeping on orbit, were upgraded to accept higher heat loading from the sunshield.
The relief column marches on towards the fort but heat, lack of water and a sand castle building competition gone wrong decimates the force to a handful.
Alternatively, a chemically inert reaction mass can be heated using a high-energy power source via a heat exchanger, and then no combustion chamber is used.
When electricity is generated, the heat that is produced as a by-product can be captured and used for process steam, heating or other industrial purposes.
