I’ve scanned (at 300 dpi, full color) a brochure from the Aerion Corporation describing their supersonic business jet. It’s several years old… somewhere around 2005-07, I’d guess. I’ve posted the scan in PDF format over at yon Patreon, available to any and all patrons of Aerospace Projects Review.
This is the fourth of four “PDF Reviews” I plan to have in October, to make up for the lack of any in September. The idea is to present interesting online resources for those interested in the sort of aerospace oddities that you can find in the pages of Aerospace Projects Review. This little project is supported through my Patreon campaign; at current levels, I’ll post two such reviews per month. If you’d like to see more, or just want to contribute to help me along, please consider becoming a patron.
A work of no small importance in the history of spaceflight is “A Method of Reaching Extreme Altitudes” by Robert Goddard. Published in 1919 while his early rocketry work was being funded by the Smithsonian, “Method” is one of the major works of rocket engineering of the 20th century. At this time of writing, Goddard had experimented only with solid rockets; liquid rockets still being in the future. But in “Method” Goddard began to show what rockets could be capable of. In his last section he discussed what would be needed to launch a rocket not just to high altitude, but to escape velocity and beyond, with some discussion of how much flash powder would be needed to be detected impacting (and flashing) on the darkened surface of the moon.
It was that last bit that caused all the trouble.
Goddard was not by nature a publicity hound. And the press of the time, once they got hold of the report, savaged him for what they – incorrectly – saw as a sensational proposal to actually build a moon rocket, coupled with a flawed understanding of physics on the part of some reporters and editorial writers. The resulting firestorm in the press served to popularize Goddards work and inspire rocketeers around the world… but it also inspired Goddard to be even more of a recluse. Had this not been published, or had it escaped the notice of the press, it’s interesting to speculate how history might have been different. Many German rocket scientists might not have been as inspired, while Goddard might have been less reclusive and thus more open to accepting assistance. The result *might* have been that WWII would have ended not with German rocketeers being sought all over the world, but American rockeeters in the same position… but victorious. The result of *that* would have been to potentially move the march to space forward by five to ten years, while denying to the Soviets much of the expertise of the Germans.
The Internet Archive has a scan of a Smithsonian copy of the report. Their copy has a number of hand-written corrections and notations, and appears to be a proof copy rather than one of the final published versions.
Link to the abstract page:
https://archive.org/details/methodreachinge00Godd
And directly to the PDF:
https://archive.org/download/methodreachinge00Godd/methodreachinge00Godd.pdf
This is the third of four “PDF Reviews” I plan to have in October, to make up for the lack of any in September. The idea is to present interesting online resources for those interested in the sort of aerospace oddities that you can find in the pages of Aerospace Projects Review. This little project is supported through my Patreon campaign; at current levels, I’ll post two such reviews per month. If you’d like to see more, or just want to contribute to help me along, please consider becoming a patron.
One of the odder American aircraft in the immediate post-war period was the McDonnell XP-85 “Goblin.” This was essentially the smallest jet fighter possible to build with the technology of the time… small so that it could be carried within the bomb bay of the Convair B-36. The B-36 could reach far, far beyond the range of any conceivable escort fighter, leaving it at the mercy of defending Soviet fighters; if it could carry a fighter jet with it, it might stand a chance. of course the idea was fairly ridiculous; the Goblin was the biggest plane that could be carried internally, yet would almost certainly stand little chance against a conventional fighter.
Dropping the fighter from the bomb bay would be fairly easy and straightforward. But getting it back was understood to be a challenge. The Goblin would rendezvous with a “trapeze” projected well below the bomb bay, outside of the turbulent airflow around the bombers fuselage. Once docked to the trapeze, it would be mechanically stabilized, the wings would fold up and the trapeze would retract, safely drawing the fighter into the bomb bay. That, at least, was the plan; actual testing with a B-29 showed that the docking rendezvous was far more difficult than envisioned.
This difficulty was not wholly unforeseen. In 1947, the Langley Aeronautical Lab ran a series of wind tunnel tests of a 1/10 scale model of the Goblin and the forward fuselage of a B-36. Tests were conducted with both “power off” and “power on” models; the power off models were well behaved when docked to the trapeze, but the power on models quickly underwent violent flailing. The tests were filmed, with small still images included in the test report; the power-on model response is dramatic, to say the least.
Stability and Control Characteristics of a 1/10-Scale Model of the McDonnell XP-85 Airplane While Attached to the Trapeze
Here’s the link to the NASA-NTRS abstract of the report.
And here’s the DIRECT LINK TO THE PDF.
The wooden model of the FP-85 used. Note the hinged wings and the rudimentary landing gear, used to protect the model if it falls free.
Diagram of the XP-85 model.
Many years back I was given a photocopy of a Soviet journal article describing a Soviet version of the WWII-era “Silverbird.” The Silverbird was the brainchild of Austrian rocket engineer Eugen Sanger and was a concept for a hypersonic rocket powered “spaceplane” capable of dropping bombs halfway around the world. In the years immediately after the war, the report Sanger wrote proved to be influential on policymakers and engineers, especially in the USSR.
This article describes a Silverbird modified with sizable ramjet engines mounted to the wingtips. Sadly, I can’t read a single word of Russian, so I can’t make heads or tails of it apart from the illustrations. One notation indicates that this may date from 1947. The vehicle described would seem to be the “Keldysh Bomber.”
I have scanned the article and posted it as a PDF on my Patreon for patrons at the $1.50 level (c’mon… that’s $1.50 a month! Mere pennies a day!).
This is the second of four “PDF Reviews” I plan to have in October, to make up for the lack of any in September. The idea is to present interesting online resources for those interested in the sort of aerospace oddities that you can find in the pages of Aerospace Projects Review. This little project is supported through my Patreon campaign; at current levels, I’ll post two such reviews per month. If you’d like to see more, or just want to contribute to help me along, please consider becoming a patron.
This one is a bit different from usual. Instead of a report full of art and diagrams and charts and, well, sentences, this one has none of those. Instead, what it does have is 5,271 pages of data. Data, specifically, on the X-Y-Z positions of every single vertex of every single tile on the Shuttle. Of what value is that? Well, someone with a whole lot of patience could, I presume, feed this data into a 3D modeling program and produce a *really* accurate model of at least part of the Space Shuttle. So… knock yourself out.
The direct download link for the PDF file is HERE.
Not long ago, I was alerted to a pair of eBay auctions for vintage blueprints of “Supersonic Escape Capsules.” The blueprints, produced by the US Army Air Forces, depict models of the capsules made from plexiglas and plywood. This would be generally interesting to me, but one of the diagrams seemed to indicate that the diagrams might not be what they said they were. Instead, it looked a *lot* like an aerodynamically improved “Fat Man” atom bomb. I suspected that what was for sale were actually test or display models of early atom bomb casings, intentionally mis-described for security reasons. I managed to score both blueprints with surprisingly minimal fuss.
Upon receipt of the blueprints, my suspicion that at least one of them depicts an evolved Fat Man seems to have been misplaced. Fat Man was about 60 inches in diameter; the model is 38.5 inches in diameter, which would make for an odd scale. But the idea of a supersonic escape capsule being studied in 1946 is also odd, since the USAAF was years from having supersonic aircraft. And the configurations don’t really seem to work as escape capsules; typically such things are the entire cockpit which can break away from the aircraft, but these would make for very unfortunate cockpits for supersonic aircraft. So at the current time I can’t quite figure this one out. I’ll continue to see if I can run down info on this, but leads are few.
I have not scanned in these blueprints yet. They’ve been folded up longer than most of the people reading this have been alive, so it’ll take a good long time to flatten them out and make them safe for scanning. But I’ve taken some photos, which I’ve made available in full rez in a ZIP archive for all of my APR Patreon patrons. The APR Patreon page is HERE. If you want to help preserve and make available obscure aerospace history items such as these, please consider contributing to the APR Patreon. For as little as $0.75/month, you can help out, plus gain access to a bunch of aerospace “rewards” like these. You can also help out by helping to spread the word.
The first “escape capsule” on a quite good vintage blueprint. The resemblance to “Fat Man” is obvious… but likely dubious. It’s a close match to the Davy Crockett warhead from a decade later.
The second “escape capsule,” on a larger and more badly faded blueprint.
One of the problems with photographing large format blueprints is the almost inevitable groupies. Cats like paper. Cats *love* crinkly paper. And 70-year-old vellum blueprints are the crinkliest of crinkly paper. Fortunately, no damage done.
The October rewards for the APR patrons have been released. They include:
PDF document: “A Recoverable Air Breathing Booster,” A Chrysler study from 1964 for a strap-on booster system for the Saturn Ib incorporating additional H-1 rocket engines and jet engines for recovery.
PDF Document: “XF-103 Descriptive Data,”a Lockheed collection of information on the then-current XF-103. This is from a Lockheed collection of information on competitors designs.
Large format diagram scan: the Boeing Advanced Theater Transport. A later version of the tilt-wing “Super Frog.”
And for the higher-end patrons, a CAD diagram of an early NACA-Langley design for what would become the X-15.
If you would like to access these items and support the cause of acquiring and sharing these pieces of aerospace history, please visit my Patreon page and consider contributing.
NOTE: this is the latest official “PDF Review.” (Two were supposed to be released in September, but events prevented that. So this is the first of four to be released on October.) The idea is to present interesting online resources for those interested in the sort of aerospace oddities that you can find in the pages of Aerospace Projects Review. This little project is supported through my Patreon campaign; at current levels, I’ll post two such reviews per month. If you’d like to see more, or just want to contribute to help me along, please consider becoming a patron.
The Boeing 2707 supersonic transport was cancelled in 1971. The cost of developing the aircraft, coupled with the increased fuel costs due to the oil embargoes of the early 70’s, doomed the effort. However, NASA continued to spend money on studies of supersonic transports throughout the 1970s and into the 1980’s, focusing their interest on SSTs with advanced aerodynamics and propulsion systems in order to reduce fuel burn and thus operating costs.
One such study was performed by Ling Temco Vought for NASA-Langley in 1973. The study described a four-engine SST design to serve as a baseline for further study and refinement. Basic characteristics of the design:
The initial design was based on a previous Boeing design from 1968, the Model 733-336C. While broadly similar to the earlier design, the LTV design deleted the Boeing’s deployable canard, used larger non-afterburning engines, moved the main wing forward, increased the size of the tail and cranked the wing sweep slightly. Additionally, the four-abreast seating of the Boeing was changed to five-abreast in the LTV design, with an increase from 234 to 292 passengers. This was made possible by a slight enlarging of the fuselage.
The very latest in computer graphics, 1973 style.
Note: the following two illustrations were stitched together from separate pages in the PDF. The full resolution versions are available to all APR Patreon patrons HERE.
The NTRS abstract page:
Advanced supersonic technology concept study reference characteristics
The direct link to the PDF file on the NTRS:
Advanced supersonic technology concept study reference characteristics
After a bit of a delay, the September rewards have been released. These include a large-format inboard profile of the North American Aviation F-108 Rapier Mach 3+ interceptor:
And “Notes on Space Technology,” a compilation of notes by the Flight Research Division of the NACA Langley Research Center based on a space technology course given in the early part of 1958. A hefty 670+pages in length, this covered just about every aspect of space travel as understood in 1958. While I haven’t read the whole thing, it appears to be not only of historical interest, but also useful to get a pretty good general grasp of space travel science, principles and technologies.
Also included for the higher level patrons are three CAD diagrams:
Boeing Bird of Prey stealth, manufacturing and materials testing prototype aircraft from the 1990’s
Zenith Star experimental space based laser anti-missile system, 1988
Hypersonic Test Vehicle 2, a maneuverable hypersonic glider for missile-launched warheads
The September rewards are about a week and a half late in being released. Since I hope to get the October rewards out a little earlier than normal, that means that the September releases will probably be available for a short time.
If you would like to access these items and support the cause of acquiring and sharing these pieces of aerospace history, please visit my Patreon page and consider contributing.
NOTE: this is the third official “PDF Review.” The idea is to present interesting online resources for those interested in the sort of aerospace oddities that you can find in the pages of Aerospace Projects Review. This little project is supported through my Patreon campaign; at current levels, I’ll post two such reviews per month. If you’d like to see more, or just want to contribute to help me along, please consider becoming a patron. This PDF was originally on the NASA Technical Report Server. But it seems to no longer be there… probably a victim of the needless security panic, NTRS shutdown and subsequent database lobotomy. So, I’m hosting the 17 megabyte PDF file HERE: Advanced Atlas Launch Vehicle Digest
In the mid-1960’s, Convair produced an unknown number of issues of a a magazine-like publication about the Atlas, this being issue #2 from April, 1967. This described the state of the Atlas space launch vehicle at the time… recent successes and configurations available or soon to be available.
Described and illustrated are the various strap-on solid rocket boosters, upper stages and payload fairings available. This is done with quite a number of reasonably high quality engineering diagrams and paintings, trajectory diagrams, data tables and graphs showing payload and velocity ranges. This “digest” would be useful for preliminary payload planning, for missions from 100 n.mi. circular orbits, to geosynchronous transfers, lunar impact missions and planetary flyby missions as far as Pluto.
The illustrations are, as might be expected from a 1967-vintage publication, all non-computer generated.
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