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.

 

 

Continue reading »

 Posted by at 10:14 pm
Jan 192022
 

Radian announces plans to build one of the holy grails of spaceflight

The “holy grail” in this case is an SSTO spaceplane. It is to *not* incorporate airbreathing or wacky unproven technologies; instead, it is to use fairly conventional liquid propellant rocket engines in the tail of a cranked-delta spaceplane. To lob it off the ground, it will use a powered sled for a horizontal runway launch.

Ehh.

Same basic concept as the Sanger Silverbird of 1944 vintage, or the Boeing “Windjammer” and RASV concepts from the 70’s. If they can get the mass ratio to work… sure, it’s possible. They’re claiming a 48-hour turnaround. Uh-huh. I’ll believe it when I see it. I wish them the best, but I’ve seen far too many such press releases since the 90’s to get all excited.

A few patent applications that might be of interest:

Earth to Orbit Transportation System

Rocket propulsion systems and associated methods

The not terribly enlightening website is here:

https://www.radianaerospace.com/

Curiously, one of the names attached to both patent applications that might be of interest to readers of this blog is Gary Hudson, of the Phoenix SSTO, Air Launch and Roton fame. But he doesn’t seem to be listed on the website.

 Posted by at 1:59 pm
Oct 142021
 

Here are some screenshots snagged from a not-quite-final version of the book, showing the sort of content you can expect from the final product.

As before it is available for pre-order from both the publisher and from Amazon:

 

 

 

 

 Posted by at 10:57 pm
Jun 012021
 

Hmmmmm…..

Department of Defense Fiscal Year (FY) 2022 Budget Estimates

Page 215

Title: Rocket Cargo

Description: The Department of the Air Force seeks to leverage the current multi-billion dollar commercial investment to developthe largest rockets ever, and with full reusability to develop and test the capability to leverage a commercial rocket to deliver AFcargo anywhere on the Earth in less than one hour, with a 100-ton capacity. The Air Force is not investing in the commercialrocket development, but rather investing in the Science & Technology needed to interface the capability with DoD logistics needs, and extend the commercial capability to DoD-unique missions. Provides a new, faster and cheaper solution to the existing TRANSCOM Strategic Airlift mission. Enables AFSOC to perform current Rapid-Response Missions at lower cost, and meet a one-hour response requirement. Rocket Cargo uses modeling, simulation, and analysis to conduct operational analysis, verify military utility, performance, and operational cost. S&T will include novel “loadmaster” designs to quickly load/unload a rocket,rapid launch capabilities from unusual sites, characterization of potential landing surfaces and approaches to rapidly improve those surfaces, adversary detectability, new novel trajectories, and an S&T investigation of the potential ability to air drop a payload after reentry. This is not a rocket engine or launch vehicle development program. It is an S&T effort to leverage the commercial development into a novel new DoD capability.FY 2021 Plans:Utilize modeling, simulation, and analysis to conduct operational analysis of Rocket Cargo concepts, trajectories, and design considerations and verify military utility, performance, and operational cost. Gather operational data from on-going commercial large-scale, instrumented, reusable launch events.FY 2022 Plans:Mature effort in leveraging commercial space launch to create military capability in Rocket-based Cargo delivery. Complete S&T testing leveraging the current commercial prototype testing. Perform site measurements needed to integrate the capability onto DoD missions including plume-surface physics and toxicity, loads, detectability, and acoustics. Also, complete initial AFRL wind tunnel testing to assess novel trajectories needed for air-drop capability, and high-speed separation physics. Under contract and CRADA, partner with Commercial to test and demonstrate an initial one-way transport capability to an austere site. Seek to perform an early end-to-end test to fully identify the technical challenges. In addition, complete Industry outreach for load master concepts including novel container designs, load/unload concepts, and testing the compatibility of AF cargo with rocket launch and space environments. Issue solicitation and award contracts.FY 2021 to FY 2022 Increase/Decrease Statement:FY 2022 increased compared to FY 2021 by $38.169 million. Funding increased due to planned program requirements and the development and maturation activities described above.

HMMMMM….

Sounds vaguely familiar. I wonder where I’ve seen ideas kinda like that before.

 Posted by at 7:31 pm
Apr 152021
 

… but manufacturing them will be a challenge. Modern computerized design processes can produce wings with rather organic internal structures that would be meaningfully lighter while being just as strong, but they could not be manufactured today. But one day it will likely become possible to 3D print large sections of wings directly out of, say, titanium or carbon fiber with the fibers built-in, oriented correctly. And then the structures aeronautical engineers have used for more than a century of ribs and spars will be replaced with something that looks like the interior of a birds bones.

 Posted by at 2:00 pm
Jan 282021
 

Sigh. It’s sad to think that in many ways the 1970’s were more forward thinking than today. Solar Power Satellites the size of Manhattan, space colonies the size of small states. Today… apart from SpaceX, about the most you can hope for is ever more social media. Until, of course, you get deplatformed.

Below is a piece of NASA-Ames art depicting the interior of an Island 3 colony. The full size version is downloadable HERE. This was intended to be a cylinder 5 miles or so in diameter by 20 long, rotating along the long axis to generate “gravity.” In this design, fully one third of the “land area” was given over to windows that would bring in sunlight via mirrors. Other notions included mounting strips of very powerful artificial light on the “ground” facing up to light the other side (this was the Babylon 5 approach), mounting strips of artificial light along the central axis pointing outwards, having external parabolic mirror beam sunlight through the central axis and reflected or diffused outwards. In order for an island 3 habitat like this to be dynamically stable, you’d need two of them, side by side, rigidly linked at the hubs. This would counter the torque and prevent the cylinders from converting rotation around the long axis into end-over-end tumbling, which is the natural response of something like this (experiment: try to spin a pencils around the long axis. You will inevitably end up with it tumbling)

The NASA art below shows an exterior view of a complete colony.The habitats would need to be pretty close to the same mass, but otherwise their interiors could be very different… one could replicate, say, farmland and meadows and such with small towns scattered about; the other could have forests and large cities. One could be in winter, the other in summer. The full-rez is downloadable HERE.

There is a ring of “cans” around the end of each habitat. These are the agricultural units for the habitat; each independently spin around their own axis, generating the level of artificial G appropriate to grow wheat or corn or weed or hay or whatever is needed. Being smaller in radius, Coriolis effects would be substantially more noticeable; but as plants don’t care, and the job of agriculture will probably be done by robots, it doesn’t matter much. Each farm would be pretty well closed off from the others, so if some sort of blight were to pop up, chances are good it could be contained.

 

A few years ago I had a notion for a book – half technical descriptions, half manifesto/screed – about megaprojects. A description of not only what mankind could do given time and energy, but what mankind *should* do in time. As with a lot of things, this books got squashed by the realization that its already been done (gosh, thanks Isaac Arthur), but I still kinda want to 3D CAD model one of these things. I’ve not thought about that book in some years… got a hundred pages into it, I think. Shrug.

 Posted by at 1:14 am
Jan 042021
 

Let me  get this out of the way: flying cars are a COOL IDEA that, when the rubber meets the road and the math hits the calculator, generally doesn’t make much sense. You end up with a car that isn’t that good married to an airplane that isn’t that good.  More expensive than either a car or a light airplane should be, with the performance of neither.

Nevertheless, it remains an evocative notion. And from the standpoint of an aerospace engineer, an interesting engineering exercise. And one of the more recent, more interesting flying car concepts is the “Firenze Lancaire.” This design says “to hell with making a flying car for the masses” and goes straight for the “hypercar” market. The end result is a carbon fiber bodied vehicle with Tesla motors and batteries for getting around on the roads, and two turbojets for getting around in the air. The car is quite large and would be difficult to park, but if you’re paying five million dollars for a car you’re probably not taking it to WalMart.

The website is filled with snazzy images. It just looks sci-fi-cool. But it also looks… kinda incomplete. There are no control surfaces; the wing structure is largely undefined. The wing folding mechanism is interesting and all, but the wings do not appear to have a good structural attachment to the car. They look like a modest G-load and they’ll snap right off.

Is this for real? Is it a serious engineering effort… or is it just someone’s demonstration of their ability to make spiffy CAD models? I don’t know, though I have suspicions. There are enough moving parts on this thing to get it legally qualified as an Autobot, and that worries me some.

 

 Posted by at 2:31 pm
Nov 232020
 

Stratolaunch starts building Talon hypersonic plane for Mach 6 flights

Construction is underway of an unmanned rocket-powered aircraft to be carried by the Stratolaunch “Roc” aircraft. The Talon-A is supposed to be something like the proposed X-24C… a lifting body hypersonic platform that can have various experimental units – including scramjets – attached to it. The Roc would be capable of carrying three Talon-A’s at a time, though it seems unlikely that there’s a really good reason to do so.

 

 Posted by at 2:52 pm
May 242020
 

There have been a lot of “personal air vehicles” designed over the last decade, most designed for VTOL operations and many with purely electric  propulsion systems. One such design – which I can’t vouch for on either technical or financial fronts – is the Delorean DR-7 from Delorean Aerospace, founded by the nephew of *that* Delorean.

Their website, lean on details:

http://www.deloreanaerospace.com/

An article from 2017:

A Flying Car From DeLorean Really Won’t Need Roads

And a patent (US9862486B2):

Vertical takeoff and landing aircraft

 Posted by at 9:07 pm