Covid-19: Nobody Saw It Coming?
The frequent excuse for the lack of civil preparedness to the corona virus is, “Nobody saw it coming.” Well, a Texas grocery store chain with a Director of Emergency Preparedness did: Inside the Story...
View ArticleClik here to view.
Cessna 210 Wing Spar Failure
Cessna T210M Wing Spar Shear between top rivets and lower I-beam Flange Narrowing Point (and Lower Forging Lightening Spotface Indentation.) The white foam may have collected water, aiding corrosion....
View ArticleSoftware Fix Found For A220 Engine Acoustic Resonance Shutdowns
Very interesting: “Airbus has determined that acoustic resonance is behind the destruction of four engines on its new A220 airliners in the last couple of years. The company has come up with a software...
View ArticleVery Light Jet (VLJ) Market History to 2020
Like everybody connected to the aviation industry, I watched the Very Light Jet (VLJ) market hype (mostly around Paul Allen’s Eclipse 500,) in 2002 and wondered how the market would shake out. After...
View ArticleClik here to view.
Github Actions Demo Repo with Several Programming Languages
I created a Github repo to test using the Github Actions build workflow feature to lint several programming languages (Perl, Python, Ruby and Bash) in different directories simultaneously. Github...
View ArticleKiCad Features
– KiKit is a panelization utility that supports panel fiducials (alignment markers.) (EasyEDA and Altium have a built-in panelization UI.) The KiCad fiducials key is “F”. – Panelizing boards within...
View ArticleClik here to view.
EasyEDA PCB Software Review
I evaluated EasyEDA Designer (v6.4.20.6 July 6, 2021 on Mac OS 10.11) to design a simple but complete (SPICE simulation, parts, mounting holes, annotations) through-hole, one-sided PCB to illuminate an...
View ArticleClik here to view.
Intro to Designing and Making Your Own PCB Boards
Glossary: PCB = Printed Circuit Board EDA = Electronic Design Automation software hobbyist PCBs = single- or double-layer boards without high-frequency circuits Designing and making PCB boards is one...
View ArticleOpenAPI to GraphQL Gateways
A lot of companies are in the situation where they have a working, tested REST API server and they want to enable GraphQL queries as easily as possible. Both are data access methods that allow...
View ArticleTerraform Workspaces
Terraform workspaces allow you to use a different state file from the CLI, or the equivalent with Terraform Cloud. Workspaces are used to provide cooperative isolation. They can be thought of like...
View Article