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February 22, 2021 Archives
Monday, February 22, 2021
CONTEXT: United Airlines Flight 328 Update: Boeing 777-200 Fan Blade Failure
Posted at
22:23
THE HAPPENING WORLD: Perseverance Rover’s Descent and Touchdown on Mars
Here is the complete NASA/JPL news conference presenting this video, discussing how it was acquired, and what it reveals about the performance of the landing system. The video captured during the descent and landing phase was captured by commercial video cameras and processed on-board the rover with a Linux-based computer running the ffmpeg open source video encoder software.
Posted at
21:49
CONTINUITY: Molecular Sieves—A Vacuum Pump with No Moving Parts
Here is more information on molecular sieves.
Posted at
16:12
TRACKING WITH CLOSEUPS: How Do Nuclear Submarines Make Oxygen?
I'd never heard that submarines use “oxygen candles” as a backup to electrolysis to generate oxygen. Combustion that liberates free oxygen in a submerged submarine—what could possibly go wrong?
It is also interesting that monoethanolamine scrubbing allow removal of carbon dioxide without a consumable such as lithium hydroxide.
Posted at
13:27