https://penon.tadorne.org/Recent content on PenonHugoen-GBMon, 01 Jan 0001 00:00:00 +0000https://penon.tadorne.org/about/Mon, 01 Jan 0001 00:00:00 +0000https://penon.tadorne.org/about/<p><strong>Tadorne</strong> designs marine instruments, to be made in small numbered series. Penon is the first.</p> <p>Everything published is signed with a single GPG key, anchored in the DNS of <code>tadorne.org</code>:</p>https://penon.tadorne.org/documentation/Mon, 01 Jan 0001 00:00:00 +0000https://penon.tadorne.org/documentation/<aside class="callout"> <p class="callout__title">Work in progress</p> <p>This page is a digest of the bench work, updated as measurements land. The instrument&rsquo;s specifications will only be frozen once it leaves the bench.</p>https://penon.tadorne.org/project/Mon, 01 Jan 0001 00:00:00 +0000https://penon.tadorne.org/project/<h2 id="the-problem">The problem</h2> <p>A masthead sensor with rotating parts wears, seizes and breaks — often far from any port.</p> <h2 id="the-approach">The approach</h2> <p>Wind is read in the way it disturbs an ultrasonic field between fixed transducers. The measurement is reciprocal: the medium cancels out, the wind remains. Nothing moves.</p>