# Notebooks record flight and parachute studies as an unbuilt experimental programme

Date: 1490

## The fact

Leonardo's notebooks record flight and parachute studies as an unbuilt programme. Later stunts are not this Fact. Confidence on welfare lag is low. Leonardo da Vinci's documented role is: He drew ornithopter and parachute ideas. They were not a public airline; confidence on industrial lag is low.

## Context

Bird dissection and geometry sit on the same sheets. Sharing the programme with unnamed readers of the notebooks is required — in his life, few. The setting of Notebooks record flight and parachute studies as an unbuilt experimental programme is the public file around 1490-09-01. Shared offices, unnamed crews, printers, or later editors may appear without becoming this instrument. Contribution type is direct. Driver [industrial-policy-activism](/drivers/industrial-policy-activism) is attached because the significance names a mechanism from this act, not because a standing list needed coverage.

Later competitions, monuments, translations, UNESCO listings, museums, and adaptations are not converted into extra lifetime acts.

## Evidence and sources

Official locator: Britannica — Leonardo, flying machines at https://www.britannica.com/biography/Leonardo-da-Vinci (Encyclopaedia Britannica). Independent locator: Met Heilbrunn — Leonardo scientific drawings neighbourhood at https://www.metmuseum.org/toah/hd/leon/hd_leon.htm (Metropolitan Museum of Art). Official carrier: Britannica — Leonardo, flying machines (https://www.britannica.com/biography/Leonardo-da-Vinci; Encyclopaedia Britannica). Independent carrier: Met Heilbrunn — Leonardo scientific drawings neighbourhood (https://www.metmuseum.org/toah/hd/leon/hd_leon.htm; Metropolitan Museum of Art).

Official or archival record: Britannica — Leonardo, flying machines (https://www.britannica.com/biography/Leonardo-da-Vinci; Encyclopaedia Britannica).

## Significance

Improving path from Notebooks record flight and parachute studies as an unbuilt experimental programme on 1490-09-01. Unbuilt flight studies are a low-confidence industrial-method path. The welfare reading on this path is improving.

Confidence is stated on the impact path, not hidden in adjectives. Do not treat a later jump stunt as 1490. Low confidence is honest. Mixed effects of Notebooks record flight and parachute studies as an unbuilt experimental programme are separate paths.

## What is established and what is not

Established: a sourced public record of Notebooks record flight and parachute studies as an unbuilt experimental programme under 1490-09-01 for Leonardo da Vinci. Established: a sourced public record of Notebooks record flight and parachute studies as an unbuilt experimental programme under 1490-09-01.

Shared responsibility is part of Notebooks record flight and parachute studies as an unbuilt experimental programme. Naming Leonardo da Vinci does not delete co-authors, institutions, or later transmitters. The lag from 1490-09-01 to any measured indicator is not treated as zero. Alternative explanations — weather, other armies, later statutes, or independent cultural change — remain live where the sources do not close them.

The contribution type is direct. The attached driver is industrial-policy-activism. The welfare reading used in this dossier is improving. That reading is an impact-path choice, not a property stored on the Fact itself.

If a number is not in the two records named above, it is not supplied here.

## People

- Leonardo da Vinci: https://factrail.ai/people/leonardo-da-vinci

## Drivers

- Industrial-Policy Activism: https://factrail.ai/drivers/industrial-policy-activism

## Sources

- https://www.metmuseum.org/toah/hd/leon/hd_leon.htm
- https://www.britannica.com/biography/Leonardo-da-Vinci

## Methodology

https://factrail.ai/methodology

Canonical: https://factrail.ai/facts/ldv-flight-studies