Hypersonic Art

A 1986 NASA artists impression of a hypersonic aircraft, showing heating along the leading edges. This *appears* to be a hypersonic transport (as opposed to a military or research vehicle). Likely part of the “Orient Express” concept for an HST derivative of X-30 NASP technologies.

C-1986-3888 HST


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One-Man Lunar Rocket

Found on ebay, an artists impression of a Hamilton Standard concept for a one-man rocket propulsion system for use by lunar explorers. Dating from 1964, this is a “rocket belt” similar to that built and flown by Bell. The lack of atmosphere would give the rocket nozzles better performance than in Earths atmosphere, and the lower lunar gravity would mean that lower thrust would be needed. Still, performance would likely have been rather disappointing… at best a few minutes of thrust.

ebay 2014-07-19 3 ebay 2014-07-19 2

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PDF Review: Swept-Wing X-1 “The Effect of Negative Dihedral”

NOTE: this is the second 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.


In 1948, the Langley Aeronautical Laboratory, Langley Field, VA, put oput a technical paper with the snappy title “The Effect of Negative Dihedral, Tip Droop, and Wing-tip Shape on the Low-speed Aerodynamic Characteristics of a Complete Model Having a 45 Degrees Sweptback Wing.” This described the results of wind tunnel testing of a  model of the Bel X-1 supersonic research aircraft with swept wings. At the time, supersonic aerodynamics was in its infancy, and while it was known by this point that swept wings had superior supersonic drag than unswept wings, the details were murky.

Numerous studies were made of re-winged X-1′s, including forward-swept wings. As it happened, no version of the X-1 was ever equipped with anything but unswept wings (though the later versions had substantially thinner wings). Such studies were performed by not only Bell Aircraft but also the NACA; the latter studies may have used the Bell X-1 wind tunnel  models, but may not have indicated an intention or desire to actually re-wing an X-1. Instead, the X-1 was a known commodity, and by modifying an existing wind tunnel model, changes in performance could be quickly and inexpensively determined without having to design and build entirely new models.

In this study, several different wingtips were evaluated, including squared-off tips, rounded tips and droops tips.

The results of low- speed tests made to determine the effects of negative geometric dihedral, tip droop, and tip shape on the aerodynamic characteristics of a complete model having a 45 degree sweptback wing are summarized as follows :

1. The use of -10 degree geometric dihedral resulted in a reduction in the average value of the effective-dihedral parameter C2V through the low and moderate lift- coefficient range that was about 65 percent as great as that usually obtained for unswept wings.

2 . Drooping the wing tips 45 degrees (maintaining the same ground clearance as that with -100 geometric dihedral) resulted in a decrease in the average value of C2V through the low and moderate lift-coefficient range equivalent to about -14 degrees geometric dihedral and also caused an increase in the maximum lift coefficient of 0.15.

3. Changes in the wing- tip plan form indicated that C2V was lowest for the parallel and circular tips and highest for the tips skewed either in or out .

4. By changing a square- cut tip to a faired tip of revolution, the maximum value of C2V for the model with parallel tips was reduced by an amount equivalent to about -4 degrees geometric dihedral.

5. Deflecting the wing tip (from zero) resulted in rolling and yawing moments about the same as that produced by a conventional aileron on a similar sweptback- wing model.

This file was originally added to the NASA Technical Report Server in the mid/late 1990s, and featured rather sad 2-bit (black and white) scanning… fine for text, adequate for line drawings, terrible for art & photos. When I re-accessed it for this review to make sure that it was still available, it had been re-scanned and re-uploaded in full color, provided vastly better image quality.

The abstract can be seen HERE. The PDF file can be downloaded directly HERE.

swept wing X-1 1

Three-view of the swept-wing X-1 showing levels of dihedral.

swept wing X-1 2

Photo of the wing tunnel model. Note the markings applied to the model. As wing tunnel models are very rarely painted except as needed by the science of the tests, this indicates that this may have been a conventional X-1 wing tunnel model that, after testing, had been painted to turn it into a display model… and then brought back into the shop and re-purposed as a wind tunnel model again.

swept wing X-1 3

Drooped wingtips studied.

swept wing X-1 4

Different wing planforms & tips examined.


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Apollo, 1963

North American Aviation artists impression of the Apollo CSM and LEM, circa 1963. There are quite a few details here that are substantially different from the vehicles actually built and flown.


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Extended Lunar Operations

Found on ebay, a bit of NASA promo art depicting a 1966 Apollo Applications Program concept for a LEM Shelter. This would have been a more or less stock descent module with an ascent module  without the ability to ascend. It would thus have been capable of transporting more cargo to the surface, including a habitat better capable of supporting a crew for a week or more. Transport back up to lunar orbit would have been accomplished via another LEM.

apollo app 1

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Garret Shuttle Ad

From 1973, a magazine ad for the Garrett Corporation (avionics manufacturer) showing Robert McCall paintings of the Space Shuttle system as then envisioned. At that point, the basics of the Space Transportation System were worked out, but the details were up in the air…

1973 garrett shuttle ad

As shown here – which appears to represent a Rockwell design – the Orbiter features a “ridge” down the centerline of the cargo bay doors. This was originally where the manipulator arm (or “arms” as shown here) was supposed to go. The cargo bay was a cylindrical volume, and when filled with a cylindrical payload there would obviously be no room for an arm. So the arm had to fit *outside* that cylindrical volume.

Additional details: it was originally thought that exposed RCS thrusters on the sides of the nose would get roasted on re-entry, so they were hidden behind doors in earlier designs. The proboscis at the front o the ET was a solid rocket motor, used to de-orbit the tank. As originally envisioned, the tank would make it to orbit, or nearly so; it would need to be propulsively de-orbited so that it would come down over the ocean and cause no damage. In the end, the role of the orbital maneuvering  system was bumped up so that staging off the ET was carried out just a bit below stable orbit; as a result the ET would naturally re-enter over the Indian Ocean without further effort.

And a lot of early art depicted the Shuttle with lots and lots of paint. Not only on the External Tank, but on the *underside* of the orbiter. I assume that this is just artistic license rather than anyone actually believing that white paint would survive re-entry.

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Patreon: August rewards released

The rewards for my Patreon patrons have now been released. This months selections include:

Diagram: a very large, very nice layout of the Avro Arrow. This was voted on by the top-level patrons.

Document: a report on the Vought Regulus II cruise missile which includes some very nice layout and inboard diagrams of both the operational and test missiles. This was voted for by the top-level patrons.

Document: “Introduction to Kistler Aerospace Corporation,” a full-color brochure from 1995 describing the K-0 sorta-SSTO launch vehicle (which would use an “launch platform”).

Additionally, for the higher-level patrons ($5 and up) there are three all-new CAD diagrams:

1) The Boeing “Big Onion” SSTO from the 1970s, meant to launch Solar Power Satellite components

2) The Space Shuttle Main Engine

3) The Northrop Tacit Blue stealth testbed. This is, so far as I’m aware, the first time that a clear and accurate three-view of this aircraft has been released publicly.

I’ve changed things a little bit from last month. At each patronage level, there are different levels of rewards. Each level has its own message under the “Creations” tab just above the APR logo at my Patreon page. And in the upper righthand corner of each message is a little gray rectangle with “Zip” in it. This is the link to the ZIP archive containing the files for that specific patronage level. If you are a higher-level patron, this may not include all the files you are entitled to. You should be able to download everything from the lower-level patron messages.


2014-06 regulus 2014-08 CAD 2014-08 arrow 2014-08 kistler



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One-stop lunar base

A 1963 Douglas concept for a simple lunar base: a small pressurized hab that carries with it a robotic “snowblower” that, under control from Earth, spews lunar dirt atop the hab. This is done to provide radiation/thermal/meteoroid shielding. If the hab is actually a “wet lab,” i.e. the actual upper stage, formerly filled with propellants, then this could be a reasonably cost effective approach. The robot is nuclear powered, but it appears that the reactor is not mounted permanently on the robot. instead, the first thing it would seem to do is haul the reactors some distance away, dig a hole, and then burying it (or at least place the reactor in the hole). Extensive power cabling would be needed.

lunar base 63

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Last chance for July Rewards

I’ve got the August rewards just about ready to go. When I make them available for the current Patreon supporters, the July rewards will be replaced. So if you are interested in the July items, time runs real, real short.

1) A large format diagram of the B/J-58, a Convair concept for a two-engine tactical B-58

2) A PDF document, “Manned Space Stations and Alternatives” which covers Gemini and Dyna Soar-based small MOL-like station concepts, and includes info on the Gemini satellite inspector/interceptor

3) Two CAD diagrams, one of the McDonnell-Douglas Model 192 ISINGLASS hypersonic rocket-powered recon platform, the other comparing the Titan IIIC with the Titan IIIC/Dyna Soar and the Titan IIIM/MOL.

If you’d be interested in helping me dig up and release this sort of obscure aerospace historical material, or if you want to get in on the rewards, please consider joining my Patreon.


2014-07 ad3 2014-07 ad2 2014-07 ad1

Posted in bomber, Dyna Soar, hi-rez, launch vehicles, Patreon, rockets, space shuttle, space station, spacecraft, spaceplane | Leave a comment


A 1963 General Dynamics film about the EMPIRE program (early manned interplanetary missions), starring Krafft Ehricke. Included are a lot of artists concepts that I haven’t seen before, or have only seen poorly reproduced before. Includes a color version of the Mars lander illustration I posted a few months back, numerous illustrations of manned interplanetary craft and several paintings of the NEXUS SSTO super-booster. It also includes Ehrickes trademark optimism about the schedule for manned space exploration… humans to Pluto by 1995, for instance.

embedded by Embedded Video

YouTube Direkt


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