This is the ingot’s moment of sacrifice. The upper stage performs a “ballast jettison” burn. Explosive bolts fire. Pneumatic pushers shove the ingot away from the stack at 1.5 meters per second.
Cape Canaveral, FL – When a rocket screams off the launch pad, the world watches the fire. We track the fairing separation, the stage cutoff, and the beautiful ballet of satellite deployment. launch ingot
“One month you are flying three microsats totaling 400 kilos. The next month, you are flying twelve cubesats and a space tug weighing 1,200 kilos,” explains Maria Chen, a launch vehicle integrator for a major smallsat launch provider. “You can’t redesign the rocket’s dynamic envelope for every flight. You need a variable counterweight.” This is the ingot’s moment of sacrifice
Until then, the next time you watch a launch webcast and hear the commentator say, “Payload deployment confirmed,” spare a thought for the last object to separate. Pneumatic pushers shove the ingot away from the stack at 1
For now, it is indispensable. Without ballast masses, the economics of rideshare collapse. You cannot fly a variable menu of small satellites without a fixed counterweight.
The ingot is mounted to the top of the kick stage or the center of the rideshare stack. Engineers perform a “mass moment of inertia” (MMI) test, spinning the stack to ensure the simulated weight matches the flight software.
Environmentalists are beginning to push back. “Each ingot has the kinetic energy of a freight train at orbital velocity,” says Dr. Liam O’Rourke, an orbital debris researcher at MIT. “We are intentionally placing dense, un-trackable bricks in high-traffic lanes. One collision with a Starlink satellite and the shrapnel cloud takes out a hundred more.”