Jul 252023
 

Color me not just skeptical, but damn near dismissive:

Reviving The PBY Catalina For Modern Warfare Is This Company’s Goal

I fully support the manufacture of newly designed, modernized PBY “Catalina” flying boats. Damned things were awesome 80 years ago; had I buckets of money, I’d fund the program myself. But *this* program does not inspire a great deal of (i.e “any”) confidence. All they show are a few *very* low re and simplistic CG renders of a modernized PBY… lacking the  braces that kept the parasol wing from snapping off during maneuvers. I know materials have advanced a lot since the 1930’s, but come *on,* that design just don’t look right without those braces.

Recall that just over a year ago an Australian company said they were going to remanufacture the Grumman Albatross flying boat. The last “news” update to their website was December of 2022.

 Posted by at 10:38 pm
Jun 292023
 

A NASA article on the status of the X-57 “Maxwell” says that they’re wrapping up work on it, with no mention of it actually flying:

X-57 Project Creates Paths Toward Electric Aviation

The X-57 is a modification of an existing conventional aircraft to be all-electric. Lots of new technologies were integrated and apparently some useful advances were made, but the real issue remains batteries. Until the energy density of batteries gets a *lot* better, electric-powered aircraft are going to remain pretty niche. Flying the X-57 would be nice, but with the existing batteries it’s kind of dead in the water.

What would be great is if NASA kept working on the X-57 at a low level. The technologies onboard would be occasionally upgraded, and when meaningfully better batteries – or perhaps some sort of modular fuel cell system, perhaps, or indeed a small nuclear reactor (a man can dream) – become available, integrate them into the vehicle and at last fly it.

 Posted by at 7:57 pm
Jun 062023
 

I put one copy of each of my current books on ebay. They’re all in brand-new condition, and will be signed/dated when sold. They also come with bonus 18X24-inch prints… the “SR-71” book has two prints of the SR-71, the “B-47/B-52” book has one B-47 diagram and two B-52 diagrams; “US Supersonic Bomber Projects Vol. 1” has two B-70 Valkyrie diagrams. Take a look…

 

Lockheed SR-71 Blackbird (Origins and Evolution): Signed, with bonus prints

Boeing B-47 Stratojet and B-52 Stratofortress: Signed, with bonus prints

US Supersonic Bomber Projects Volume 1:  Signed, with bonus prints

 

 Posted by at 10:37 pm
May 132023
 

Stratolaunch Successfully Completes Separation Test of Talon-A Vehicle

Stratolaunch LLC announces it has successfully completed a separation release test of the Talon-A separation test vehicle, TA-0. The flight was the eleventh for the company’s launch platform Roc and the second time the team has conducted flight operations in Vandenberg Space Force Base’s Western Range off California’s central coast.

 

 Posted by at 7:23 pm
May 052023
 

In 1983 “Science Digest” ran an article that 13-year-old me lost his tiny little mind over. Illustrated by Rick Sternbach, designer of, among other Star Trek vehicles and artifacts, the USS Voyager, it described a series of possible means of interstellar travel. While the physics and engineering of some of them have proven dodgy in the years since (the Bussard ramjet has serious problems with the proposed magnetic fiend, the Enzmann starship has turned out to not be as well thought out as many had assumed, etc.), it remains a tantalizing glimpse of what might be. The article has been scanned in full color and made available to APR Patrons/subscribers at the above-$10 level.

 

If you would like to help fund the acquisition and preservation of such things, along with getting high quality scans for yourself, please consider signing on either for the APR Patreon or the APR Monthly Historical Documents Program. Back issues are available for purchase by patrons and subscribers.




 

 

 

 

 

 Posted by at 9:29 pm
Mar 062023
 

An interesting CGI video depicting three sizes of folding rotor tiltrotor High Speed VTOL from Bell. The concept is not new; actually building and flying one, though, would be. The designs shown are also not new; Bell has been floating them for a few years at least since late 2021.

https://view.ceros.com/bell-helicopter/hsvtol/p/1

 

 Posted by at 5:44 pm
Nov 102022
 

Atlas launch to test inflatable heat shield

 

A United Launch Alliance Atlas 5 is scheduled to lift off from Vandenberg Space Force Base in California at 4:25 a.m. Eastern Nov. 10. The primary payload of the rocket is the Joint Polar Satellite System (JPSS) 2 weather satellite …

A secondary payload on the launch of JPSS-2 is Low-Earth Orbit Flight Test of an Inflatable Decelerator (LOFTID), a NASA technology demonstration. While JPSS-2 will be deployed nearly a half-hour after liftoff, LOFTID will remain attached to the Centaur until 75 minutes after liftoff, following a deorbit burn of the Centaur.

Shortly before deployment, LOFTID will inflate a reentry shield six meters in diameter. That heat shield will slow down the vehicle from orbital velocity to Mach 0.7 as instruments on board collect data on the performance of the shield. LOFTID will then deploy parachutes to slow it down for the rest of its descent, splashing down in the Pacific east of Hawaii to be recovered by a ship.

Inflatable heat shields have been studied since before humans flew into space. Normal heat shields need to withstand insanely high temperatures, requiring materials that are either insanely expensive and complex, or that involve complex, fragile and heavy active cooling systems (such as water cooling through transpiration), or which are ablative. The latter variety is technologically fairly simple, but ablatives tend to be heavy and they are labor intensive to apply and make reusability difficult.

With temperatures reaching several thousand degrees, inflatable materials would seem inappropriate for heat shields. But those high temperatures are not a mandatory feature of re-entry. To a first hand-wave approximation, the maximum temperature is proportional to the mass-per-surface-area of the re-entry vehicle. A one-ton vehicle is going to have to shed all of its orbital velocity, converting all that kinetic energy into thermal, regardless of the size or shape or cross-sectional area. The way that is done is by compressing the air the vehicle slams into; the heating isn’t due to friction, but to the compression of the gas. If you can spread that heating energy out wider… the gas doesn’t heat up as much per unit surface area. Heating can be reduced from the sort of thing that will melt tungsten to the sort of thing that can be survived by advanced polymer fibers. As a bonus, the inflatable shield, being far larger than the solid shield on the vehicle, provides drag all the way down. In principle it would be possible to dispense with parachutes, wings, retro-rockets, and simply drift down using the shield as an inverted parachute. This was the case for the Douglas “PARACONE” concept from the mid-1960s, designed for, among other uses, as an emergency “life boat” for astronauts in space. It would provide for a safe entry, deceleration and touchdown on either land or water.

 Posted by at 5:15 pm
Oct 042022
 

My third book, “US Supersonic Bomber Projects Vol 1” is, as I understand it, somewhere between “being printed” and “being shipped.” I am thus hard at work on Volume 2. I had hoped to also do a Volume 3, but that is unlikely: Volume 3 would be “Space Bombers.” However, apparently the market for “space” is nothing like what it is for “aviation,” so the idea has been nixed. There is official interest in several other works I’ve planned, so properly published books seem likely to continue for some time.

That said: while the market for “space” is less than the market for “aviation,” my own interest in the two is about equal. And I would be happy to sell works at a number substantially lower than a professional, proper publisher would. A publisher would have books on bookstore or grocery store shelves, while I would only sell from my little website.  And if I’m not incredibly stupid about it (no guarantee of that, of course), a self-published book would, theoretically, bring in more on a per-book basis than one done through a publisher. So I’m contemplating something like a Kickstarter for “Space Bombers.”

As currently laid out, this book would be almost overwhelmingly “The Book Of Dyna Soar,” as the bulk of (available) American space-based bombardment studies revolved around that program. However, it would extend well beyond Dyna Soar, including Orion and other strategic orbital weapons systems studied back in the sixties, on up through much more recent studies including aerospaceplanes and bombers based on the X-33/Venturestar/RLV studies. Being self published I would not be locked into a set page count and, perhaps, could include foldouts and perhaps more color art (depending on funding). This could be released as both an Ebook and a softcover… and, depending on length, a hardback. Other “extras” could include 18X24 or 24X36 prints of diagrams, perhaps on something like mylar.

I am *far* from setting up a Kickstarter for this. I’ve seen a lot of people get *really* mad about funding this or that project and then watching it slip far behind schedule, so I wouldn’t even start a crowdfunding campaign until it was substantially complete. There are a number of topic areas that I really want to delve into more deeply via FOIA and whatnot, a process that has become far more troublesome in recent years. At this point it’s in the “this is an idea to think about” stage. But I am interested in any input on the subject… thoughts on crowdfunding, ideas about subjects to add and, as always, input of documentation on the topic that you might have that you think I may not.

 Posted by at 9:05 pm
Sep 052022
 

Back in 2016 I released seven PDFs of CAD diagrams formatted for printing at 24X36 inches (those are shown after the break). This was another product line that didn’t exactly blow up the market, and no further diagrams were released. But now that I have two books of CAD diagrams released, and two more coming (and potentially more after that), I’m considering trying again. The Lockheed CL-400 Suntan, A-11, A-12, SR-71, YF-12, along with several B-47 and B-52 related designs are possible, as well as designs that aren’t from those books (X-20 Dyna Soar, several Orion vehicles, etc.). If this sounds interesting, let me know; if there is something specific you might be interested in, let me know.

 

 

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 Posted by at 10:14 pm