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Skylark-1 — Pocket CubeSat Kit for Schools

A flight-grade 1U CubeSat kit a high-school class can build in a semester and launch on a shared rideshare for under €30k. Open hardware, open ground-station, and a curriculum that walks teenagers through the same process used by ESA.

complexity: hardtolerance: ultra precision
Skylark-1 — Pocket CubeSat Kit for Schools

Snapshot

Feasibility at a glance

PT localization

7/10

High

Most steps can be localised in Portugal.

Per unit

€2,400–€3,800 per kit

at 25-unit volume

Starter batch

25units

minimum viable run

To first batch

20weeks

6 phases, design to ship

Budget

€60K–€133K

all-in estimate

Bottom line

5-axis CNC out of 7075 — the dimensional tolerances are hard but well-documented.
Read full insight

Picked based on the localization score (7/10) plus the dominant process (cnc machining). For an early build at this batch size, this gives you the best balance of cost, risk, and speed of iteration.

What it does

4 capabilities

Wakes up after deployment and waits ten minutes before powering on.

Charges itself from the sun whenever the panels see daylight.

Takes Earth photos and broadcasts them on a frequency students can decode.

Logs orbit health so the class can debug their own design after launch.

How it's made

4 stations · build route

  1. 1

    Mill the chassis

    5-axis CNC out of 7075 — the dimensional tolerances are hard but well-documented.

  2. 2

    Stuff the boards

    Reflow oven for the SMT layers, hand-solder the connectors that astronauts can fix.

  3. 3

    Vibe and bake

    Two weeks at a partner test lab — vibe table, then thermal-vacuum chamber.

  4. 4

    Integrate and seal

    Final torque, kapton tape, and then the cube doesn't open again until orbit.

Risks to watch

3 identified · 1 blocking

1 high
2 medium

High

Single-source ICs become unobtainable

Modern designs almost always include one IC with ≥30 week lead times when demand spikes.

Mitigation — Pin the BOM to two qualified part numbers per critical line and place rolling forecast orders.

Medium

Firmware ships before it's stable

Hardware looks done, software is still landing fixes — early customers feel it.

Mitigation — Hold the launch ship-date on a single firmware-stability KPI, not on hardware readiness alone.

Medium

CE / FCC test fail on first attempt

Most first-time radios fail EMC; budget a re-spin.

Mitigation — Pre-scan in a partner anechoic chamber before the official lab visit.

Production timeline

20 weeks to first batch

wk 1wk 7

CNC machining

wk 1–2

Anodising

wk 3

PCB fabrication

wk 4

SMT pick-and-place

wk 5

Soldering

wk 6

Functional QA & batch sign-off

wk 7

wk 1–2 is the longest stretch — CNC machining takes 2 weeks of the 7 weeks on this build.

What goes into it

6 materials · 7 processes

Materials

7075-T6 aluminum (chassis)Triple-junction GaAs solar cellsLithium-ion 18650 cellsFR-4 high-Tg PCBPolyimide thermal blanketIndium-tin-oxide window

Processes

cnc_machininganodizingpcb_fabricationsmt_assemblysolderingfinal_assemblytesting_inspection

Design philosophy and best practices

5 principles

A school CubeSat kit has to follow real CubeSat dimensions and safety rules while staying easy for students to build and test. Standard interfaces and good documentation matter as much as the hardware.

1

Follow the CubeSat Design Specification

Outer dimensions, rail finish and mass limits from the CubeSat Design Specification decide whether a kit could ever fly in a deployer.

2

Design for student assembly

Keyed connectors, numbered fasteners and one-way parts reduce build mistakes and broken boards.

3

Protect the battery carefully

18650 cells need protection circuits, inhibit switches and safe charging. Launch providers require these for flight units.

4

Plan thermal behaviour

Without air, heat moves only by conduction and radiation. Coatings, blankets and board layout set temperatures.

5

Make every subsystem testable alone

Separate test points and simple ground software let classes test power, radio and sensors one by one.

Common pitfalls

Avoid

Rail surfaces that do not meet the hard anodising and flatness requirements.

Avoid

Using cells or parts without traceability when a flight opportunity appears.

Avoid

Ignoring radio licensing; amateur bands need coordination through the IARU.

Avoid

Writing documentation last, which makes the kit hard to teach.

10-year evolution forecast (2026-2036)

4 phases

CubeSats have become common teaching tools. The points below are trends.

2026–2028

Classroom kits

Trend: more schools use ground-only kits with real flight-style interfaces.

2028–2031

Shared launch programmes

Trend: education launch programmes from space agencies give student satellites more chances to fly.

2031–2034

Software-defined payloads

Trend: reprogrammable payloads let one satellite serve many lessons.

2034–2036

Debris rules

Trend: stricter deorbit and debris rules shape even small education missions.

Outlook

Expect kits that follow flight standards closely to be most valued by schools aiming at a real launch.

Materials intelligence

6 materials

Aluminium alloy

Low supply risk

7075-T6 chassis and rails

Sourced from: Primary aluminium is led by China, with smelters in Norway, the EU and the Middle East; bar and plate are widely stocked in Europe.

Triple-junction GaAs solar cells

High supply risk

Solar panels

Sourced from: Produced by a few specialist makers in Europe, the US and China.

Fragile and expensive; schools often use silicon cells for ground kits.

Lithium-ion / lithium-polymer cells

High supply risk

18650 battery cells

Sourced from: Cell production is dominated by China, South Korea and Japan; EU cell capacity is growing but limited.

Shipping follows UN 38.3; EU battery rules add labelling and recycling duties.

High-Tg FR-4 laminate

Medium supply risk

Circuit boards that tolerate heat cycling

Sourced from: Most laminate is made in China and Taiwan; some in Europe.

Polyimide film

Medium supply risk

Thermal blanket

Sourced from: Made by a few chemical companies in the US, Japan and South Korea.

Indium tin oxide coated glass

Medium supply risk

Window or sensor cover

Sourced from: Indium is a by-product of zinc refining, mainly in China and South Korea.

Prototyping and rapid manufacturing in Portugal

5 companies from the atlas

Active Space Technologies

Taveiro

Space PCB fabrication and soldering

Power and radio boards built to space practice.

Adlanext, Unipessoal Lda

Celorico de Basto

CNC machining and anodising

7075 chassis and anodised rails.

3DWays

Oeiras

CNC machining and anodising

Small batches of chassis parts.

Exatronic

Aveiro

PCB fabrication and SMT assembly

Classroom board sets.

Proto-Electronics

Braga

PCB prototyping and assembly

Quick sensor board revisions.

586 Portuguese manufacturers matched

None cover the whole build — it splits across steps.