Nov 242021
 

A few weeks ago SpinLaunch managed to spin up their demonstrator and lob a projectile into the sky. I did not give it a whole lot of thought; it just doesn’t impress me a whole lot. There are easier ways to accelerate a projectile to the speed of sound.

However, Thunderf00t *did* give the concept a lot of thought, and he’s anti-impressed. One detail that I’d noticed was that the projectile emerges from the “muzzle” of the launch tube crooked. One thing I *didn’t* do was closely examine the faint and blurry in-flight footage of the projectile. And I should have, because the projectile is *tumbling.* In retrospect this makes sense: while attached to the rotating arm, the projectile is rotating at about three revolutions per second. Once released, it will retain that angular momentum; since it’s not touching anything – it’s not riding rails, or sliding down a barrel, nor at its fins reacting against air since it’s in a vacuum – there is nothing to arrest that rotation. So it leaves the “barrel” tumbling. This would be *disastrous.* Even if the fins could stabilize the projectile in flight, a massive amount of launch energy would be wasted in the process, the trajectory would be virtually randomized, accelerations would be massive and all over the place.

In short, this thing seems to be a whole lot of nothing as far as being practical.

 Posted by at 10:49 pm
Nov 242021
 

Where we watch a guy react to “Moonraker” for the first time:

By many metrics, “Moonraker” is a bad movie. By any metric it is the goofiest, most ludicrous Bond movie. And yet it’s my favorite Bond movie; I have watched it *many* times. First on HBO back in the day, then on laserdisk, then VHS, then DVD, then Blu Ray, then streaming and one of these days on 4K if it’s ever released on that format. It’s bonkers, it’s dumb, the physics is just *awful.* And yet it has some of the awesomest bits of Bond ever: Hugo Drax is far and away the best Bond villain ever; Jaws returns and steals every scene. And Jaws’ love interest Dolly? The two make the best couple in all of the Bond movies with a love story for the ages.

And the Space Marines? Stupid, but I love it.

I have a 1/72 “4D Vision” cutaway model of the Space Shuttle (purchased long, long ago when they were affordable) set aside for the specific purpose of turning it into Moonraker 5, complete with laser and ark cargo. Some day…

 

 Posted by at 4:44 pm
Nov 222021
 

Took them a while and a few failed attempts to do so… but that “a while” was a historically short period. Five years and change from the founding of the company to the first orbital flight is about two years quicker than any other private rocket company.

Astra becomes the fastest rocket company to reach orbit

They were able to achieve this by disdaining NASA-style analysis paralysis and just designing a good-enough launch vehicle, followed by iterative testing, failure, fixing, testing again. This worked well for SpaceX; it worked well for Astra. Compare with SLS…

 Posted by at 12:11 pm
Nov 172021
 

And a space program!

A few weeks ago the United Nations put out a video where an indifferently rendered Utahraptor goes before the United Nations and argues that he knows a thing or two about extinction, that extinction is a bad thing, and that humans should not subsidize their own extinction. Rather, humans should work *against* extinction. These are all good points. And the logical conclusion to draw from this is that mankind should, at once and without delay, convert the money currently being wasted on social welfare programs into industrial-scale efforts to develop gigaton-yield thermonuclear devices, deep-space comet and asteroid detection and tracking systems, fast and efficient interplanetary transport system. The nukes would be used to divert potential threats; the improved propulsion and power systems would have the secondary benefit of opening the entire solar system and its resources to exploitation and colonization. heavy industry and its pollution could be moved off-world; Earth could be converted into a garden. By doing so, mankind – and every species we choose to bring with us – would be rendered *almost* immune from extinction. Nothing else mankind could possibly do would have a hope in hell of being even a minuscule fraction as impactful.

 Posted by at 10:12 am
Nov 132021
 

Some programs fade away; some die sudden deaths. The Saturn V, and the Apollo program in general, seemed to just sort of fade away; the public perception *seems* to be that as public interest in Apollo post Apollo 12 or so rapidly faded, interest in continuing Apollo faded, and thus the program was just allowed to die, finally killed off by Nixon.

Small problem with that narrative: the actual date of the death of the Saturn v can be precisely determined. in the NASA History office archive some years ago I found a memo by NASA Administrator James Webb, dated July 31, 1968, where the production of new Saturn V vehicles was cancelled. This limited the future of Apollo moon missions to only those Saturns already then under construction. Note that this is almost a *year* prior to Apollo 11 landing on the moon, and about four months prior to the election of Richard Nixon. Nixon could, perhaps, maybe, have restarted Saturn v production, but that’s not clear: when programs like this are cancelled, the staff vital for them *scatter.* Tribal knowledge evaporates. Equipment is sold for scrap, left to rust. Restarting production likely would have been fabulously expensive.

In mid 1968, the Apollo/Saturn program was obviously not facing post-success disappearing interest. The public was still thrilled. What NASA was facing was a slashed budget, with funds needed to further the progress of mankind being diverted to “Great Society” social programs. So instead of missions to the Moon and beyond, we got another fifty years of malaise, burdensome taxes and families being actively discouraged and dissolved. Thanks, LBJ. Thanks a lot.

 Posted by at 2:28 pm
Nov 132021
 

I stumbled across some paperwork that for no readily apparent reason I’ve kept for a quarter century. Shown below are two correspondence that might be of some amusement.  They deal with my very first “real” job after graduation, when I was hired to work on a The Next Big Thing project for Orbital Sciences Corporation.

First up (some personal data redacted):

Neato! I’m hired! So I packed up my stuff (including my baby archive, which fit in two boxes), drove from Illinois to Virginia right smack in the middle of the Blizzard Of The Century, spent a bucket of cash for an apartment, and started an exciting new adventure, sure to be filled with excitement, career fulfillment and fair and reasonable treatment from my employers. What could possibly go wrong?

Gee, that was fun.

It was a short, sharp shock that gave me a good solid look at the aerospace industry in the US. Unfeeling corporations, sociopathic bosses, incredibly blinkered, short-sighted management *and* self-serving unions, all beholden to quite possibly the *dumbest* politicians in human history.

I shoulda gone into art. I have no real talent for it… but then, I’ve seen “Star Trek: Discovery” and it’s clear that talent and skill are no longer important or even desirable in modern artistic endeavors.

 Posted by at 8:18 am
Nov 022021
 

The modelling is nearly complete. Unfortunately, the fully assembled version of the CAD model is so complex that none of my computers would even attempt to render or shade it; all I seem to be able to get are wireframe images. That’s what I get for being poor, I suppose. The shuttles are themselves each as complex as many of the CAD models I’ve made.

 

 Posted by at 7:25 am
Oct 312021
 

The rewards for October, 2021, have been sent out. Patrons should have received a notification message through Patreon linking to the rewards; subscribers should have received a notification from Dropbox linking to the rewards. If you did not, let me know.

Document: “C-131C Tactical Unit Support Airplane,” 1953 Consolidated Vultee briefing on cargo aircraft military capabilities

Document: “Aerodynamic Model test Report Titan IIIM Final Posttest Report 0.0535 scale Force and Pressure Model Phase II,” 1967 Martin Report Of Unusual Size (ROUS, 353 pages) describing with charts, data, model photos and diagrams, of the proposed Titan IIIM topped with a Manned Orbiting Laboratory.

Diagram: General Arrangement of the Douglas D-558 research aircraft (provenance unknown)

CAD Diagram (for $5-level and up): Medusa Spinnaker, second illustration of giant but lightweight nuclear pulse propelled spacecraft

 

If this sort of thing is of interest, sign up either for the APR Patreon or the APR Monthly Historical Documents Program. *ALL* back issues, one a month since 2014, are available for subscribers at low cost.




 Posted by at 6:46 pm
Oct 192021
 

I recently came across something on ebay that looked interesting; the buy-it-now price is a bit steep, so I googled it. Huzzah! It’s available online as a PDF. D’oh: my antivirus program freaked out that the connection to the university website is insecure. Huzzah! It has been archived on the Wayback machine.

https://web.archive.org/web/20210627145321/http://users.umiacs.umd.edu/~oard/apollo/LOR_News_Conference.pdf

This is a writeup, with photos and diagrams, of the July 11, 1962 news conference at NASA headquarters where the Lunar Orbit Rendezvous technique was described. prior to the the understanding was that the Apollo Command and Service Modules would land directly on the lunar surface; this sounds easy, but required a bigger booster than the Saturn V and would have put the astronauts far above the lunar surface (so far as I know, no determination of how exactly the astronauts were going to get some fifty or more feet down, and then fifty or more feet back up). LOR entailed the use of the Lunar Excursion Module,a  small, lightweight spacecraft that could zip on down the the surface from lunar orbit and then hop on back up. Far less mass needed to go to the lunar surface, meaning the planned Saturn C-5 (later Saturn V) could take care of the whole mission in one shot. No need to assemble spacecraft in Earth orbit using multiple launches of hardware and propellant tankers.

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 Posted by at 3:37 pm