This is really bad but unfortunately not surprising
And we all know it’s not just SpaceX
Without a massive cultural shift in our field, aero will continue to suffer from a woeful lack of diversity that holds back the entire industry. We need to do better
I’ve got absolutely no clue how this type of culture could be allowed to exist at a company as successful and forward-thinking as SpaceX
The fact that I’m losing followers for this “take” also makes it clear that we have a serious problem
Glad I’m weeding out some creeps today
Cool cool cool, safe to say Elon isn’t abruptly prioritizing creating an inclusive culture where women and underrepresented groups will feel free to speak their mind
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Not my usual aero content but we often rely on cameras in wind tunnel testing. Camera f-number is calculated w a simple formula:
focal length / aperture diameter
As f-number ⬆️, image brightness ⬇️ & depth of field ⬇️
This is a good viz of the effect
Here’s a few other nice figures summarizing f-number
How do we get the common “f-stops” seen in the images (f/1, f/1.4, f/2, etc)?
These are powers of sqrt(2) so that light intensity changes by factors of 2 between f-stops (because intensity scales w area which goes as d^2)
Want the best of both worlds, or just have trouble deciding what you want?
Use a plenoptic lens, which relies on a “micro-lens array” to image the entire 4D light field. This enables refocusing, changing f-number, and slight tilt adjustments in post processing!
The semester is quickly winding down & I figured the @UTSA students in my undergraduate Measurements & Instrumentation class could use some extra credit, so I had them make memes about the class!
Main rules were to keep it clean, relevant to the class, & fun
Needless to say, as this class involves a lot of circuits & statistics, not all of our Mechanical Engineering students are starting from the same place...
Hey @TelegraphNews the correct answer to your poll is "none of the above" because hypersonic speed isn't defined by Mach number, it's about changes in flow chemistry, heating, thin shock/entropy layers, etc.
@TelegraphNews One of my favorite graphics summarizing what truly defines hypersonic flow, from J. Anderson's "Hypersonic and high-temperature gas dynamics"
Hypersonics is definitely having a moment as part of the zeitgeist (seems to happen once or twice a year), but for everyone reporting on this stuff I wish the opening chapter to the Anderson hypersonic text were required reading