Original technical writing · A matter of record

The Articles of

Delinio

Working papers on patent illustration, optics, mathematics, and the engineering behind the drawings. Everything here is published as a matter of record, and is researched, compiled and edited by our CEO, Etan Ayen.

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Cover: a slingback pump rendered as a design patent line drawing.
Patent illustration · 11 June 2026

On Patent Art: Quality IS Risk Management

Sixteen embodiments of one design patent figure, built from the ground up, showing how drawing quality functions as risk management. Illustrated by hand in CorelDRAW, without AI tools.

Super Heavy on ascent, illustrated for this article.
Aerospace optics · 27 July 2026

The Heavy Lift: An Agentic Exposé On Aerospace Optics and Telemetry

Five estimated camera zones on Super Heavy, video as engineering telemetry, hot-staging against Falcon 9, ullage-gas attitude control against the Shuttle RCS, and the ITAR wall that keeps the rest out of reach.

Super Heavy on ascent, cover art of The Heavy Lift series.
Aerospace optics · 29 July 2026

The Heavy Lift Part 2A: The Speculative

Two commercial cameras, a Panasonic VariCam Pure and a Nikon Z 9, held against the launch environment by the numbers: optics, shutter, sensor physics, data rate, thermal load and vibration, with a straight verdict on whether either would survive.

Super Heavy on ascent, cover art of The Heavy Lift series.
Aerospace optics · 29 July 2026

The Heavy Lift Part 2B: The Historical

The documented record of NASA flight cameras, Hasselblad 500 EL/M to the Nikon D2Xs: what flew, why weight decided it, and what space qualification actually required, from outgassing limits to tethers.

Super Heavy on ascent, cover art of The Heavy Lift series.
Aerospace optics · 29 July 2026

The Heavy Lift Part 2C: Gimbals & Glass

Gimbals as mathematics, the other ways to hold a camera still, what radiation does to an image sensor, and the Space Shuttle windshield report: a case study in engineering discipline from NASA CR-112234.

Cover art for VWAP: 3:1., One Name. Three Functions.
Financial mathematics · 26 August 2026

VWAP: 3:1.

The volume-weighted average price was built as an execution benchmark and is shipped as a trend indicator. Above the trading session the label stops denoting one quantity and starts denoting three, with different memories, different responsiveness, and different error; nothing on the chart says which one you have.

Cover art for 25,000 USD to Day Trade?, Why the Math Worked.
Financial mathematics · 26 August 2026

25,000 USD to Day Trade?

FINRA retired the pattern day trader threshold in June 2026. For twenty years the argument about it was conducted as a dispute over fairness; nobody worked out what the barrier actually bought. Three independent methods say the same thing, and it is not what either side claimed.