Designed to be Destroyed - Ep. 127

The equipment on the mast will be destroyed in a lightning strike, full stop. There is no avoiding this, and so the focus has to turn on making the masthead equipment into a sacrificial node. This video covers the design of a new masthead controller. This is designed specifically to remove most of the wires going up the mast, replacing them with remote control over a wireless network. The result is that only two wires cross the firewall between the mast's sacrificial node and the rest of the boat. Why is this important and how does it work? -=] Patreon:   / thedigitalmermaid   -=] Channels that have Helped Me; @ProjectBrupeg @OffGridGarageAustralia @AcornToArabella -=] References; Polyphaser IS-B50LN-C0 https://www.polyphaser.com/type-n-sur... Copperhill Pican-M https://copperhilltech.com/pican-m-nm... Fair-Rite Type 31 choke - 0431177081 https://www.digikey.ca/en/products/de... Microchip Tech APT100D60B2G FRED https://www.digikey.ca/en/products/de... Bourns 652-2026-60-C2LF GDT https://www.mouser.ca/en/ProductDetai... -=] Chapters; 0:00 - Designed to be Destroyed. Why? 1:14 - A change in plans 1:49 - Designing a Firewall for Lightning 2:59 - Lightning Theory; 30 kA in 1 usec... Huh? 5:08 - Lightning Shouldn't Exist, but it does... 7:02 - Taylor Cones and Hydrometeors 9:19 - The Physics of an Electron Avalanche 10:58 - A Race Between Charge Transfer and Heat 14:14 - Managing The Spicy Sausage Over Our Head 18:09 - Designing the Firewall. 19:13 - The Masthead Controller's NMEA2000 Processing 22:09 - Light Controls; ABYC vs Air Gapping 24:00 - The Physics of the Firewalls 30:02 - A Short Kitty Interlude -=] Image References; Cloud Charge Distribution © Encyclopædia Britannica, Inc. https://kids.britannica.com/students/... Graupel By Cincotta1 - Own work, CC0 https://commons.wikimedia.org/w/index... Ice Crystals By Maxim Bilovitskiy - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index... H2O with Charge By File:Water molecule 3D.svg: derivative work: MikeRun - This file was derived from: Water molecule 3D.svg:, Public Domain, https://commons.wikimedia.org/w/index... Water Droplet in Electric Field Universal scaling laws for the disintegration of electrified drops Robert T. Collins, Krishnaraj Sambath, Michael T. Harris, and Osman A. Basaran https://www.pnas.org/doi/10.1073/pnas... St. Elmo's Fire Airplane Ugo Méda https://commons.wikimedia.org/w/index... Taylor Cone By Robert Lamberts - The New Zealand Institute for Plant and Food Research Ltd, CC BY 3.0, https://commons.wikimedia.org/w/index... Townsend Discharge Fundamentals of solution plasma for advanced materials synthesis; C. Chokradjaroen, X. Wang, J. Niu, T. Fan, N. Saito https://www.sciencedirect.com/science... Stepped Leader Separate luminous structures leading positive leader steps; Shengxin Huang, Weijiang Chen, Zhong Fu, Yufei Fu, Nianwen Xiang, Xinjie Qiu, Weidong Shi, Dengfeng Cheng & Zhiyuan Zhang https://www.nature.com/articles/s4146... Lightning Stepped Leader Propagation Characteristics of lightning leader propagation and ground attachment; Rubin Jiang, Xiushu Qie, Zhichao Wang, Hongbo Zhang, Gaopeng Lu, Zhuling Sun, Mingyuan Liu, Xun Li https://doi.org/10.1002/2015JD023519