Cooperative spacecraft deployment / Gen3 Fluxrelay

Let the spacecraft carry the reaction.

A passive magnetic and copper interface on the payload. Powered windings on the launcher. A design study asking whether that trade can remove the moving sled, its brake and its return stroke.

Inspect the machine ↓Read the evidence ↗
COMPUTATIONAL DESIGN STUDY
Nothing built, measured, qualified or flown.
Controlled nominal Gen3 Fluxrelay assembly render
01 / Controlled nominal assembly. The later detailed twelve-turn winding has a separate CAD gate.
11.8 m/s4 kg reference payload · model target
0.90 mpowered travel · at most 8 g nominal
0.371 kgmodelled passive interface increment
12 turnsselected electrical partition · 126.667 A
01 / Follow the boundary

The mass does not disappear.
It changes sides.

VOLLEY aims to leave the payload unmodified. BOLLEY tests the neighbouring premise: accept a passive spacecraft interface and count what the launcher can remove.

SPACECRAFT

The passive cage

A 318.6 mm, five-lane magnetic/copper interface. No payload power or command electronics. Attachment, remanence, tolerance and compatibility remain engineering obligations.

LAUNCHER

The stationary primary

Four face channels, 27 cells per face, 45.3 mm pitch. The 1.2231 m primary contains 15.908 kg of modelled material before structure, cooling, wiring or electronics.

SYSTEM

The installed burden

The selected power modules alone add 2.5488 kg. Removing a sled does not establish a lighter complete system. A packaged allocation and payload-side mass accounting are still required.

02 / Decisions changed by evidence

The rejected designs are part of the result.

A passing calculation can support rejecting a machine. The repository preserves the failed geometry and the requirement that changed.

Generated review of winding and electrical screens
The run ledger distinguishes screen pass, design rejection and nominal CAD.
01 · REQUIREMENT

12 m/s did not fit 8 g in 0.90 m.

A10 exposed the contradiction. The reference target became 11.8 m/s; the earlier requirement and failed result remain recorded.

02 · ELECTRICAL PARTITION

More turns, less current.

A9f selected twelve turns at fixed 1,520 A-turn MMF. That preserves an ideal field screen, while resistance and inductance rise and the actual conductors still need field reclosure.

03 · NOMINAL GEOMETRY

The first twelve-turn fit failed.

A5f missed copper volume. A5g corrected the path; A5h passed ten nominal conductor-envelope bands. Manufacturing and terminal geometry remain open.

04 · LATEST / A9g

Only 10.28 J remains for omitted losses.

The selected handoff envelope reproduces turn scaling. Just six of sixteen assumed conduction/additional-loss corners stay below the reference-shot energy cap.

03 / Explore the remaining energy margin

Small losses can decide the design.

Start at the selected A9f reference point: 870.815987 J of non-inverter machine energy plus 18.903094 J of bridge conduction under its 25 °C assumption.

Change the assumed conduction resistance and add other losses. The 900 J cap stays fixed. This is the A9g accounting sensitivity, not a temperature curve or a switching simulation.

Inspect all sixteen cases ↗
889.72 Jreference source energy
10.28 Jremaining below 900 J

WITHIN THE ASSUMED ENERGY CAP

No credit for an unselected cooling system, switching strategy or recovered energy.

04 / Review the engineering record

Every claim needs somewhere to go.

01 / Requirements and duty ↗02 / Generated run review ↗03 / Selected drive and loss budget ↗04 / Detailed winding CAD criteria ↗05 / Unresolved problems ↗06 / Provenance and model limits ↗
05 / What must still be earned

A prototype needs more than nominal fit.

Close the powered path

Actual winding/lead field, RMS and peak current definitions, hot conduction, switching, protection, bus sag and thermal recovery in one configuration.

Close the mechanical path

Lane tolerance, cage attachment, independent retention, failed-channel loads, six-degree-of-freedom departure and tip-off.

Make the experiment buildable

One complete installed budget, drawings, BOM, instrumentation, assembly/inspection process and frozen acceptance criteria.