01 / POWERED DEPLOYMENT

Spaceman Craft Electric Thruster

Powered tether deployment for small satellites.

Rendering of the Spaceman Craft tether deployer in low Earth orbit
Rendering of hardware in development, based on our CAD model

01 / Why tethers stalled

Space tethers are among the most capable technologies in orbit: a thin conductive line that can bring a satellite down, or keep it up, without propellant. They have been held back by one problem: deployment. Most small-satellite tethers are pushed out by a spring and left to coast, and mission after mission they have jammed, stopped short or never left the spacecraft. The main active alternative, pushing the end mass out with cold-gas thrusters, adds propellant to a system meant to need none.

Spring and coast

Stalls short

Powered deployment

Fully deployed

02 / Powered deployment

We have built a powered tether deployment. Our proprietary hardware drives the tether out under control and confirms its progress, instead of trusting a single spring push. It is designed for 99% deployment reliability, validated in Varsha.ai, and every test campaign is built to close the gap to certain deployment.

VinMail -D1 modelled altitude history: trajectories starting at 550 km and 45 degrees or 475 km and 37 degrees, descending through 450 km and 350 km with measurements at each altitude. Modelled re-entry at 13.3 months for option A and 7.3 months for option B. Orbit-average modelled force 9.3 micronewtons, minimum hold power 1.7 watts, solar-mean hold altitude 560 km.
Modelled scenarios, not flight results.

03 / What a deployed tether does

A conductive tether moving through Earth’s magnetic field interacts with it through the Lorentz force. That interaction lets the same module bring a dead satellite down without propellant, and, as the technology matures, keep a working one in its orbit. Our proprietary deployment hardware is what makes it dependable.

04 / Who it is for

Operators and builders of 1–70 kg satellites.

VALIDATED IN VARSHA.AI

Every programme is modelled in our proprietary physics engine before we build it.

About Varsha.ai