Aerospace Projects Review Blog – Page 87 – Unbuilt aircraft and Spacecraft Projects

US Bomber Projects #09 and 10 Now Available

bomber, Dyna Soar, hypersonic, launch vehicles, nukes, rockets, spacecraft, spaceplane, US Bomber Projects, VTOL No Responses »

Sep 042014

Issues 09 and 10 of US Bomber Projects is now available (see HERE for the entire series). Issue #09 includes:

Boeing Model 464-33-0: A turboprop B-52 predecessor
Consolidated Army Bombardment Flying Wing: A ground attacker with an extreme mode of attack
GE Supersonic System 6X: A Mach 3 nuclear-powered bomber
Convair B/J-58: A supercuising version of the Hustler
Boeing model 484-2-2: AB-58 competitor
Northrop 464L: A blended wing/body spaceplane
Martin Model 223-9: a 1944 step on the road to the XB-48
Boeing Model 800-15A: A Mach 3.5 hydrogen fueled design of incredible range

USBP#09 can be downloaded as a PDF file for only $4.25:

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Issue #10 includes:

Boeing Model 464-34-3: A turboprop B-52 predecessor
Martin Model 192-5: A medium-sized flying wing
Republic Mach 7: a relatively small high-speed design
Convair WS-125A: A large nuclear powered supersonic design
Boeing model 484-415: A jet-powered supersonic flying boat
Boeing 464L: Boeings first Dyna Soar
Martin Model 223-10: a 1944 step on the road to the XB-48
Lockheed CL-1301-1: A very small VTOL ground attacker

USBP#10 can be downloaded as a PDF file for only $4.25:

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US Launch vehicles: Nova art

launch vehicles, rockets, spacecraft No Responses »

Sep 012014

A piece of NASA art (a photo from eBay, with an attempt at correcting parallax error), likely from 1962-63, depicting current and forthcoming space launch vehicles. Of note, rather obviously, is the “Nova” launcher at far right. But also noteworthy are the “Thor Agena B” and the “Atlas Agena B,” both of which are depicted with the Agena upper stage & payloads blacked out. This could be due to security concerns over the Agena configuration… or perhaps the Agena was not yet well defined, and by blacking them out, the artist would not have to depict them (and yet they could be given an air of mystery). It would not surprise me if there is another version of this artwork with the Agenas shown clearly.

Voice Controlled Propulsion Backpack

hi-rez, spacecraft No Responses »

Aug 302014

An RCA concept from some time in the 1960’s for an astronaut maneuvering unit that was to use voice controls. This would negate the need for hand controls, but it seems unlikely that 1960’s technology was quite up to the task. Image from HERE. Note that while the backpack is depicted in some detail, the Apollo spacecraft in the background is quite inaccurate and minimally detailed.

PDF Review: “Advanced Atlas Launch Vehicle Digest”

launch vehicles, Patreon, PDF Review, rockets, spacecraft No Responses »

Aug 282014

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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Liquid Hydrogen fueled Lockheed L-1011

jetliner, transports No Responses »

Aug 252014

As the OPEC oil embargo of the 1970’s ground down the American economy and jacked up the cost of transportation, many studies were made of alternative propulsion systems. For cars and buses and the like, electrical systems were at least theoretically feasible, though even today fully electric ground transport remains problematic. But electric aircraft were out of the question. Similarly, jetliners could not be retrofitted to burn coal or wood, or run off solar power. So that limited the options. One available option was liquid hydrogen. Long since proven on rockets, liquid hydrogen had been used to power jet engines in an experimental capacity. In theory it makes great jet fuel… lots of energy, and produced with no need of oil whatsoever (a nuclear reactor and an electrolysis system can do it, though there are more efficient means). But there were two major down sides: it’s a serious cryogen, requiring vacuum dewars for storage, and the density is pathetically low. Thus a jetliner would need fairly gigantic fuel tanks.

Lockheed of course studied the idea, using their last commercial airliner, the L-1011, as the basis. One concept called for giant fuel tanks to be carried on the wings, making the plane look almost like three aircraft flying in close formation; another idea was to stretch the fuselage and insert propellant tanks in front of and behind the passenger compartment. This would of course separate the passengers from the pilots. Also studied was the same idea but for an L-1011 freighter, artwork for which is shown below.

The idea would have almost certainly worked. But it would have been a logistical headache of the worst kind. None of the existing airport refueling infrastructure would have been usable, and the crews would have to be especially trained. Jet fuel can be stored in simple tanks; liquid hydrogen needs much more careful management to minimize boiloff.

Hypersonic Art

hypersonic, jetliner No Responses »

Aug 192014

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.

One-Man Lunar Rocket

rockets, spacecraft No Responses »

Aug 182014

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.

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

Patreon, PDF Review, research No Responses »

Aug 162014

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.

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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.

CONCLUDING REMARKS
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.

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

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.

Drooped wingtips studied.

Different wing planforms & tips examined.

Apollo, 1963

rockets, spacecraft No Responses »

Aug 152014

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.

Extended Lunar Operations

rockets, spacecraft No Responses »

Aug 132014

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.

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