About ENKI
A conversational spacecraft-design environment. State the mission — orbit, payload, power, link — and ENKI sizes it in front of you, driving HawkLogic's engineering calculators in an agentic loop and recording every run in a live design state you can steer.
Twenty physics tools — power and mass budgets, link and data budgets, drag decay, propulsion and ADCS sizing, thermal balance, radiation and debris compliance, orbit propagation and ground-station passes — wired to the same code that runs HawkLogic's flight trades. The numbers are real; the reasoning is shown.
ENKI — the AI spacecraft-design studio
ENKI is an AI spacecraft-design tool for CubeSat and small-satellite missions. You describe the mission in plain language — orbit, payload, power draw, downlink needs — and ENKI does the first-order systems engineering in front of you: it sizes the solar array and battery, budgets mass and data, checks the link, estimates orbital lifetime, and screens the debris-compliance rules that now gate a LEO filing. Every number comes from a real calculator run, not from the language model's imagination.
That distinction is the whole design. Large language models are good at reasoning about trades and terrible at arithmetic; deterministic physics code is the opposite. ENKI splits the work: the model decides which calculation to run next and interprets what the result means for your mission, while the calculation itself runs in HawkLogic's unit-tested physics modules — the same code behind the twenty public calculators on this site.
How the agentic loop works
Each turn, ENKI reads your request against the current design state, picks the engineering tools that answer it, and runs them with concrete inputs — often several in sequence, feeding one tool's output into the next (eclipse fraction into the power budget, delta-v into propellant mass). Every run is recorded as an artifact in a live design state you can inspect and steer, and a constraints checker sweeps the whole design each turn, flagging violated margins and inconsistencies between subsystems. Where a picture says it better, ENKI answers with charts, diagrams, and worked math rather than a wall of prose.
A design session, annotated
You — “3U Earth-observation CubeSat, 550 km sun-synchronous. The imager draws 8 W when it's on. Does the power system close, and will it deorbit in time?”
// tool run: eclipse-beta-timeline — worst-case eclipse fraction ≈ 0.36
// tool run: spacecraft-power-budget — required array ≈ 28 W BOL vs ≈ 8 W body-mounted
// tool run: deorbit-compliance — natural lifetime ≈ 9 yr → fails the FCC 5-year rule
ENKI — “Not as described. At a 30% imaging duty cycle your orbit-average load needs roughly a 28 W array at beginning of life — body-mounted 3U panels give you about 8 W, so this bus needs deployable panels or a much leaner duty cycle. And at 550 km your natural decay runs to roughly nine years: plan a disposal burn or drag augmentation. Want me to size the deployables first, or the disposal delta-v?”
// excerpt of a real session shape — three tool runs, a design state updated with three artifacts, and a constraints check, in one turn.
The calculator library behind ENKI
ENKI's physics registry is built from the same modules that power HawkLogic's twenty public calculators — every one runs standalone in your browser, free, with cited constants and stated assumptions:
- Spacecraft Power Budget
- Power Budget by Operating Mode
- Spacecraft Mass Budget
- Onboard Data Budget
- Steady-State Thermal Balance
- ADCS Sizing
- Comms Link Budget (rain fade)
- EPFD Screening (NGSO vs. GSO)
- Microwave Power Link Budget (35 GHz)
- Electrodynamic Tether Power
- Delta-V Maneuver Budget
- Propulsion System Sizing
- Ground Track & Pass Predictor
- Eclipse & Beta-Angle Timeline
- LEO Drag & Decay Timeline
- Deorbit & Lifetime Compliance
- Reentry Casualty Risk
- Radiation Dose vs. Shielding
- Single-Event-Effect Rate
- Compliance Report Generator
Common questions
Is ENKI free to use?
Yes — every visitor gets a free allowance of design turns, and signing in with a free HawkLogic account raises it. No card, no sales call. The twenty public calculators are free without any allowance at all.
Do I need an account?
No. Anonymous sessions work, but they live only in your browser tab. Signed-in users' design threads persist server-side and are resumable from the history panel — close the tab on Tuesday, pick the same design up on Friday.
How accurate are ENKI's numbers?
As accurate as the calculators, because they are the calculators: deterministic, unit-tested physics with constants cited to SMAD, ESA, and NASA references. That makes ENKI a first-order systems-engineering tool — the right instrument for sizing, trades, and feasibility, not a substitute for flight certification or high-fidelity mission analysis.
What missions is ENKI best at?
LEO CubeSat and small-satellite missions are the sweet spot — the tool coverage spans the budgets, links, environments, and debris-compliance checks those missions live and die by. It will happily reason about MEO/GEO radiation environments and transfer burns too; the further you drift from a first-order LEO smallsat, the more ENKI acts as a fast sanity-checker rather than a full designer.
// enki — sumerian god of wisdom and craft. first-order systems engineering, not flight certification. the physics is the same physics our tools pages run.