An Ex Rocket Man's Take On It

The ravings of a trained mind.

Tuesday, August 11, 2026

World’s Longest Stuff

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I found this image in someone’s post on LinkedIn.  It is too funny (and too true) not to post here!  Enjoy. -----   Search code:          ...
Sunday, August 2, 2026

What Nozzle Designs to Use Where, and Why

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I see proponents of aerospike (altitude-compensating) nozzles claiming that the improved efficiencies seen vs altitude down in the atmospher...
Sunday, July 26, 2026

Kudos to SpaceX for Flight 13

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After a last-second automatic abort on the 16 th ,  and a bad weather delay Thursday,  SpaceX was able to launch its Starship/Superheavy veh...
Saturday, July 4, 2026

Call to Action

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I received this image from HOTNIR,  which is the Heart of Texas Network for Immigrant Rights,  located in and around Waco,  Texas.  The imag...
Wednesday, July 1, 2026

Quick First-Cut at Orion Entries

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I cannot model skip trajectories or trajectories that change angle during entry.  I can only model straight-in entries at constant angle bel...
Tuesday, June 16, 2026

Recent Messages to Federal Reps

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Below is the text of my most recent messages sent to all three of my federal representation.  I rather doubt there can be any uncertainty in...
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About Me

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Gary Johnson
McGregor, Texas, United States
GW had a 20 year career in aerospace defense new product engineering, followed by a 20 year career in mostly teaching, with a little civil engineering and aviation work. He is now retired on a small farm in central Texas, occasionally building and selling cactus eradication tools, available for consulting, and offering a self-published book on ramjet propulsion. He has posted a lot of technical articles on this site, a catalog of which is in the post "Lists of Some Articles By Topic Area", dated 21 October 2021. For information about the ramjet book, see "GW's Ramjet Book Is Now Available!", posted 12 February 2024. Use the blog archive gadget as a navigation tool to find these quickly. He is also developing course materials for teaching or self-teaching in aerothermodynamics, and in the sizing of vehicles for space missions.
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