Search Results : shuttle

Oct 312013
 

By the early 1980’s, NASA has semi-permanent manned lunar bases and is sending men beyond.  Numerous space stations and manned platforms circle the Earth and the moon. Commercial platforms are popping up, with companies buying rides on the Space Shuttle and sometimes “renting” the entire vehicle. People are starting to seriously pursue space tourism as a paying business; the first such tourists buy seats on Shuttle flights that have been rented by commercial satellite launch firms. And now due to competition with the Soviet Union, the US is quickly getting into the business of militarizing space.

This is a major change to the way NASA has worked. NASA has been in the business of science and exploration; it is not well suited to commercial enterprise, military endeavors or construction projects. Future commercial and military plans are rapidly outpacing NASA plans and NASA capacity. While the NASA budget has settled out at about a constant 2.5% of the US Federal budget, the total number of trained astronauts is far too low even for planned commercial efforts in Earth orbit, never mind all the other programs. Additionally, NASA has focused on training “elite” astronauts, when what’s becoming needed is a construction corps of builders and get-it-done-types.

Further: NASA’s efforts and funding have gone preferentially towards the “S” in NASA (“Space”), while the first “A” (“Aeronautics”) has been virtually ignored. As a result, the American SST program, which resulted in the Boeing 2707 (first flight 1976) has stagnated with only twelve aircraft flying. The Boeing 737 and 747 remain, by the early 1980’s, the primary means of American air travel; even with the massive drop in oil prices following the collapse of OPEC, supersonic travel remains terribly expensive and beyond the financial reach of most travelers.

So, in 1982, after much wrangling, wailing and gnashing of teeth, NASA is broken up. The old National Advisory Council on Aeronautics, which formed the original backbone of NASA, is re-incorporated, focusing on aeronautical technology… aerodynamics, jet engines, materials technologies, etc. Facilities, staff and funding are now separate from the space-oriented organization that had been strangling them.

The space side of NASA is reorganized into the US Astronautics Agency. The USAA is aimed not only at continuing the “elite” efforts of NASA, the pushing-the-envelope projects, but also at the less glamorous efforts of space launch and construction.  The USAA is modeled somewhat on the Works Progress Administration for the Great Depression era, but instead of hiring millions of low-skilled workers in order to prop up a faltering economy, the USAA  hires and trains thousands of skilled workers to be space workers.

In order to provide direction to the USAA, the anemic National Aeronautics and Space Council (done away with by Nixon on 1973 IRL, but here it has hung on) is reformed into the more focused National Council on Astronautics. The NCA and the USAA are closely linked, in that the NCA is the political link between the USAA and the President and Congress; staffed by career bureaucrats, the NCA works to both direct political will, and to carry out political will.

The USAA is tasked with physically building the future. The former NASA research facilities, such as  Marshall, Langley, Ames and so on, continue to develop advanced technologies and missions. New facilities are set up around the nation to train the vast numbers of astronauts and technicians and engineers and others that the new programs will need, as well as take advanced new technologies and turn them into standard practices. Boise, Denver, Seattle and Albuquerque, for example, see massive new facilities. New launch facilities are built offshore from Kennedy Space Center, in the Gulf of Mexico a few miles from Galveston, and south-east of the Big Island of Hawaii. Belize lobbies hard for a launch facility.

Where NASA had tried to hold itself somewhat apart from the military and seemed at best lukewarm to commercial enterprise, the USAA is formed to work hand-in-hand with both the military and private enterprise. The USAA has unique launch and space construction abilities, and is available for rent. While some in government take issue with this, calling the USAA a “mercenary perversion of NASA’s mission,” the fact remains that the income the USAA derives from both American and foreign paying customers offsets a large fraction of the total USAA budget.

The USAA is born in controversy, with many angry at the loss of NASA; but within the decade the controversy has faded in the face of unquestioned success. While Space Station II was an acknowledged failure, Space Station I was a roaring success and a half dozen clones of it have been built and put into service. Space Station III is a new concept in space station construction; plans are in place for even bigger stations and even permanent “towns” on the moon.

Of course, there are also plans to fill the heavens with weapons. By the time Reagan leaves office in 1985, the USAA is busy launching nuclear weapons platforms and directed energy systems into orbit. These remain against international treaty… but by this point, nobody really cares much. The Soviets got there first… but the Americans got there bigger. The fact that the “mass simulator” launched by the first Neptune booster was in fact a harmless mockup remains a tightly guarded secret… by simply claiming that it is, in fact, simply a mass simulator. The Soviets assume that the claim is a lie, and so continue to believe that the platform is a weapon. Ironically, over the course of the 80’s, the platform is slowly converted into an actual platform; the mass of inert aluminum structural beams that make up its bulk are removed for use in other orbital construction projects, and are replace a bit at a time with actual power systems, sensors and weapons. By the end of the 80’s the “mass simulator” is a true battle station, but by this point it’s merely one of many.

1985 sees not only a new President – Vice President Bob Dole easily defeats Mondale – but also new design competitons. The Shuttle has been flying operationally for half a dozen years… successfully, but expensively. It will need replacing by the 1990’s for passenger launch. Also, the Neptune has replaced the Saturn V, but it, too, will need supplementing by the early 1990s. Something bigger is needed…

To be continued

 Posted by at 8:52 am
Oct 302013
 

Reagans public talk of space weapons is, initially, just that: talk. In the latter half of the 1970’s, the USAF has no plans for space based weaponry, and is initially taken aback by Reagans public discussions. There are some ill-prepared DoD denials of such programs made by various officials; these denials only serve to convince the Soviets that the US is, in fact, developing space weaponry. So, Soviets being Soviets, they have to get there first. The CIA keeps a careful watch over these developments.

By 1980, the CIA can confidently report that the Soviets are in fact testing space-based weapons platforms, intended both to destroy space assets such as communications and recon satellites, and also to drop nuclear warheads onto ground targets. This is, of course, in violation of treaties banning nuclear weapons in space. But the Soviets are convinced that the US is ahead of them in this race. The failure by the US to publicly display their own space weapons confuses and dismays the Soviets; they read this as the Americans being confident due to a massive superiority over the Soviets. When, in fact, the US has almost nothing to show.

The Soviets launch their first Polyus space battlestation in summer, 1980. This terrifies the US public, much as Sputnik did, especially in light of the past several years of Communist advances around the world. After the early US withdrawal from Viet Nam, South Viet Nam was left vulnerable; within 8 months the armistice had broken down and the North Vietnamese Army had swept south, conquering the South. The US did nothing to stop this, being simply tired of the war and too busy with other matters. The Soviets and Chinese saw this as weakness, American unwillingness to really stand up to them. So Communism was aggressively pushed: several nations in Africa and all of Southeast Asia are under Marxist regimes by the election of 1980. The Philippines are in open civil war against a well-funded Communist insurrection; Australia and New Guinea are looking at a Communist Indonesia. Italy, Spain and France are teetering on the edge of becoming outright Communist states.

So, by the 1980 election, the world looks ready for a new global war, one likely to be fought in the heavens. The Polyus, an enlarged dual-module Salyut station armed with, supposedly, guns, rockets, lasers and nukes, is seen orbiting overhead by the US public. Reagans idle talk of space weapons now seem vitally important; his Democrat opponent, Walter Mondale, who had been publicly lampooning Reagans talk of space weapons, suddenly looks really bad. The election is a cakewalk for Reagan, and a mandate for space weaponization.

The Space Shuttle has been flying since 1978, carrying small payloads and, more importantly, crews to the various space laboratories and Space Station I. The Saturn rockets have been launching heavy payloads such as space labs, lunar missions, unmanned probes to the planets and commercial platforms. And now the Neptune comes on scene, with first launch in the spring of 1981. The first launch is officially to be merely a test launch; the initial plan was to simply carry about 800,000 pounds of water… modestly useful as an orbiting payload, but more important just as a proper mass simulator. But in the months before the launch, the water tank is replaced with… something else. What replaces the water is not clear to the public, and the President, NASA and the USAF aren’t talking. Organizations keeping an eye on events, from news media to the KGB, are only able to put together a few confusing details… whatever it is, it’s heavy, consuming the total 1,000,000 pound payload of the Neptune, while being relatively compact. Thus, it’s dense. Blurry photos taken through a hangar door show a USAF insignia on the side of a large metal cylinder. At the  same time, Aviation Week reporters start putting together a few disparate facts: several Minuteman ICBMs have been recently removed from their silos; the upper stage and their nuclear payloads have been removed. General Electric was working on a prototype of a new generation space nuclear reactor, capable of putting out in excess of one megawatt of electrical power; the prototype has disappeared from the Nevada test site. Other details come together to indicate that whatever the Neptune is launching, it is going to be impressive. Several clumsily and hurriedly planned espionage efforts are detected and  stopped. In April of 1981, with Reagan watching from the stands, the first Neptune launches, sending it’s payload into a 300 nautical mile orbit with a surprisingly high inclination for a Florida launch. Officially, the payload remains merely a “mass simulator,” but nobody believes that.

Ground based telescopes show a compact structure, bristling with sensors, antenna, solar panels, one nuclear reactor that seemingly has not yet been turned on, and doors. Lots of doors. This “mass simulator” looks like the most dangerous thing in the solar system, and it terrifies the Soviets. Any plans they may have had about using Polyus to take out American space assets are put on hold; the US space battlestation is a monster compared to the USSR’s relatively pitiful space platform. Especially since the Soviets know that the Polyus was hastily assembled, and most of the engineers who put it together are uncertain that half the systems will even work if called upon.

What the Soviets don’t know about the American “mass simulator:” That is, in fact, all it is. A mockup made from a million pounds of aluminum, with a few spare RTG’s to provide a little bit of power and neutron radiation, to make the lights blink and the phony sensor stalks to open up. The inside of the shell is merely a tightly-packed structure of spot-welded aluminum beams. Some off-the-shelf Apollo RCS systems give it the ability to orient itself, to make it look  like it’s doing something important.

The 1980’s begin with the Soviets and the Americans staring at each other across the oceans, each convinced that the other is further ahead in the race to weaponize space than it really is. But the race is now well and truly on: the “mass simulator” bought the US time to really get going; the Soviets are not willing to pull any stunts so long as that monster is overhead, but they, too, are plowing ahead at full speed to perfect weapons systems and platforms.

At the same time, NASA has plans for the Neptune booster: real lunar bases, manned missions to Mars, asteroids and Venus, and solar power satellites. But now it looks as if the American manned space program, so long a supposedly “civilian” program, is about to be overtaken by military needs. Will NASA be forced to share resources – launch vehicles, launch sites, personnel – with the USAF? Will the USAF  run the space program? Will the USAF fracture, forming a US Space Force, perhaps with a portion of the US Navy?

To be continued

 Posted by at 1:52 pm
Oct 302013
 

Sierra Nevada Corp’s “Dream Chaser,” a copy of the NASA-Langley HL-20 configuration, had its first test flight on October 26. Dropped from a helicopter, the glide to the Edwards Air Force Base runway apparently went smoothly… except that the left main landing gear failed to deploy. The vehicle skidded off the runway and suffered damage, but Sierra Nevada says that it can be repaired.

This particualr vehicle is not meant to be orbital, just an atmospheric test craft. I don’t know if it’s *almost* the final vehicle, kind of like a smaller version of the Space Shuttle Enterprise, or if it’s just an aerodynamically identical testbed with a few of the systems. The second airframe is meant to be orbital, to fly into space atop an Atlas V.

 

[youtube QgdFotAkUEU]

 Posted by at 2:24 am
Oct 292013
 

Nixons near-defeat via voter fraud in 1968 has made him more paranoid than he was IRL. A result of this is for him to provide greater support to the FBI; as a result of increased funding and powers of surveillance, the Soviet influence upon western anti-nuclear organizations is exposed much sooner and more completely. While this does not bring an end to organizations working to end American nuclear efforts, this tarnishes their image in the public, and the anti-nuclear protestors are less numerous, less loud, less well funded and far, far less successful. Instead, new generations of fission reactors, including breeder reactors, are put into service on a regular basis starting in the late 1970s.

Additionally, with the ongoing development of the Neptune booster, with its one-million-pound payload, solar power satellite studies that IRL led only to paper and dreams here lead to real plans. The OPEC oil embargo and subsequent energy crisis ends with a sputter, due not to American anger  but to a new sense of American defiance. The oil embargo hurts *now,* but everyone knows that, within a few years, electrical power will truly be too cheap to meter. And if OPEC doesn’t want to sell us oil… with the expected surplus in electrical energy made possible by the new reactors and SPS’s, American coal will be converted into  liquid fuel with which to run our cars and planes. By the time the 1980’s roll around, nobody much cares what the price of Middle Eastern oil is, because it’s no longer quite as important.

Still, the events of 1973 lead to an economic downturn in the US. The sense of malaise that had permeated the US since 1968 only worsens, with the revived space program providing the one real bright spot. By 1976, Nixon is a tired President, ready to leave office. Not many people want Gerald Ford for President in 1976 (Agnew having resigned in 1973, as IRL). However, a new political force comes to the fore in the form of the Governor of California, one Ronald Reagan. Reagan gains the Republican nomination, with Bob Dole as his running mate; they handily defeat the Carter/Mondale ticket.

While Reagan continues many of the policies of the Nixon administration, he brings with it a charisma that Nixon lacked. A subtle effect of this is to energize the American populace; with increased morale comes increased productivity, and thus the economy begins to improve. In effect, the 80’s come early.

One other effect of the Reagan administration: space weaponization. Reagan talks openly about arming the heavens with anti-missile systems, even though there are no real plans for that in the DoD. Now that the Saturn V (with F-1A and J-2S engines for increased performance, lighter structures and parachute splashdown recovery and re-use of the MS-IC stage, with the MS-II stage typically being left in orbit to serve as raw material or structural backbones) is launching nearly monthly, the Shuttle is in tests and the Neptune system is bending metal, it is clear to the world that the US is serious about space. This causes panic in the Kremlin. By Reagans inauguration in early 1977, the US has several space laboratories including not only Skylab but also the more impressive Space Station I, as well as two preliminary bases on the moon (little more than camps at this point) and a manned lunar orbit space station. With Neptune as a launcher and the Shuttle as a servicing system, it’s clear that the US will soon be able to orbit giant nation-killing weapons systems. The plans for solar power satellites, while loudly and clearly described as basically harmless and for solely civilian power generation, are seen by many in the Soviet Union as vast death rays. So, the Soviets have no choice but to compete in the race.

The Soviets had finally managed to get their N-1 rocket to work and had landed their first man on the moon in 1972. By 1977, they too have several space labs in the form of Salyut stations, and plans are in place for their own lunar bases. They are beginning to catch up to the US. And in true Soviet fashion, they are beginning to boast and bluster; and they are being listened to by the CIA.

To be continued

 Posted by at 9:06 pm
Oct 282013
 

Nixon has taken office under a cloud. Many are calling for RFK to be tried and imprisoned; many others believe that the released files and recordings are in fact hoaxes, and that Nixon actually stole the election from Kennedy. With that start, things look dire.

Over the next four years, a series of decisions are made that differ from Actual History. For starters: Nixon makes more of a push to get out of Viet Nam sooner; the war is massively unpopular, even more so than IRL due to the collapse in faith in the American political system. Popular opinion on the war collapses catastrophically. By late 1970, the US is on the way out.

Apollo 11 happens as IRL in July, 1969, but to slightly more public enthusiasm (due to it being something good in  a sea of bad). It is immediately decided that this should be built upon. Some voices that IRL called for Apollo to be curtailed are now not as loud: Teddy Kennedy, part of the Kennedy clan that is now under much greater media and legal scrutiny, has been arrested for the drunk-driving homicide of Mary Jo Kopechne on July 18. Soon he is out of office and sent to prison for a term of several years. Others, such as William Proxmire, remain as opposed as ever, though due to the recent collapse in popularity of politicians as a whole, he has less of a public platform . The decision by the Johnson administration to cancel Saturn V production is reversed; Apollo missions to at least 24 are pushed through.

Due to Nixon Administration pressure, Apollo 12 is pushed up by one month with negative consequences; on the way to the moon in October, 1969, a propellant tank aboard the lunar module ruptures. While the crew manages to return safely to Earth, this delays the following Apollo missions. It has the effect, however, of spurring interest in the space program. A disaster that results in the survival of heroes, right at the height of interest (right after Apollo 11), makes both the public and Congress more interested in space. This is aided by Walter Cronkite: just as he had talked down the war effort in Viet Nam after the Tet Offensive in January, 1968, here he talks up the space program. In the general malaise gripping the US after the 1968 election, Cronkite turns Apollo into a point of pride.

As Viet Nam ramps down and Apollo continues on, further plans are put into place. The Apollo Applications Program IRL led to Skylab; it does so in Alternate History as well, but it is joined by plans for lunar bases by 1976 and manned Mars missions by the early 1980’s. The NERVA program is pushed ahead; the Space Shuttle program also proceeds, but as a smaller vehicle (25K lbs payload, limited crossrange, reusable manned first stage, second stage equipped with expendable external tanks). Plans are put in place to revive the Post-Saturn launch vehicles planned a decade earlier, in 1963: in 1971, a design contest is held among major contractors and General Dynamics/Astronautics wins with an improved version of their earlier Nexus launch vehicle. A long development plan is put into place to develop this as the “Neptune” booster.

The Presidential election of 1972, between Nixon and Hubert Humphrey, is both a landslide and a bore. Humphrey goes into the election under the cloud of the Watergate scandal, even though he was uninvolved; Nixon trounces him soundly. But the turnout is the lowest on record.

As IRL, the Yom Kippur War breaks out in 1973. The war plays out as IRL, with the Israelis repelling the Arab attack. As IRL, the Arab oil producing nations respond with an oil embargo against the US. However, things play out slightly differently. With the enhanced space program requiring nuclear power and nuclear propulsion, the nuclear industry is slightly stronger and much more popular than IRL. A consequence is that the OPEC oil embargo leads to a speedup in the approval and construction of nuclear powerplants. By the Three Mile Island incident of 1979, nuclear power is growing, and is seen as not only vital, but patriotic. The collapse of the American commercial nuclear industry following TMI as IRL does not occur. Much of this is due to the events of 1976…

To be continued

 Posted by at 9:29 am
Oct 152013
 

For some pretty reasonable reasons, 3D printing of metal components lags a bit behind that of polymers. The best metal components I’ve seen look pretty rough, while some high-end plastic parts are optically smooth. Still, progress is being made:

Amaze project aims to take 3D printing ‘into metal age’

Tungsten alloy components that can withstand temperatures of 3,000C were unveiled at Amaze’s launch on Tuesday at London’s Science Museum.

Tungsten. Yow. Lots of rockets use tungsten alloys in the throats due to the hardness and heat resistance of the metal. But manufacturing tungsten components is amazingly difficult for those same reasons. If these 3D tungsten parts of are adequate strength and smoothness, there just might be a revolution in small rocket engines.

I wonder if 3D printing can make tungsten components that have silver mixed in. Back when I worked on booster sep motors for the Shuttle at UTC, NASA became interested in tungsten throat inserts that were “silver infiltrated.” By mixing silver in with the tungsten, the thermal conductivity of the tungsten could be substantially improved. And while tungsten can take a hell of a lot of heat, it will merrily melt if brought to the combustion temperature of mundane solid propellants. By increasing the thermal conductivity, hot-spots in the tungsten can be smoothed out. The result would be a more survivable – and more reusable, thus cheaper –  throat insert. This might not be of much value for a, say, Sidewinder air-to-air missile… but it might be pretty good for a Sidewinder model rocket using high-end amateur rocket motors.

 Posted by at 11:42 am
Oct 042013
 

Just back from seeing the movie “Gravity.” Here is a small review, in two parts:

Part One: The Howlers

There are some serious science issues with this movie. For starters: the cause of the trouble in the movie is the Russians blasting one of their satellites with a ground-based interceptor. This is obviously the sort of thing that could cause serious trouble in low Earth orbit, but the movie stepped it up a notch by having the cloud of debris causing a chain reaction among other satellites, making *them* blow up, which makes *more* satellites blow up… in the end, the way it’s described a wave of shrapnel girdles the Earth and takes out pretty much the entirely of man-made space-based infrastructure in a matter of a few minutes. Ummm… no.

Second: Hubble is co-orbiting with the ISS, separated by a hundred kilometers or so. Ummm… no. And ISS is co-orbiting with the Chinese Tiangong space station, separated by a hundred kilometers or so. Ummm… no. You can get from one to another under the power of a backpack maneuvering unit. Ummm… no.

That said…

Part Two: Everything Else

Ho. Lee. Crrrraaaaaaaaap.

This movie earns the price of admission in the first ten minutes. The opening scene is just a view of Earth from orbit; outside of IMAX films shot from the Shuttle, you’ve never seen the like. From there you see the shuttle “Explorer” working on Hubble, With George Clooney doodlybobbing around the vehicle in a new, experimental maneuvering unit. Within short order, the SHTF, and the Explorer is struck. The Shuttle is trashed, the Hubble is trashed, and Our Heroes are pitched into the dark. This was all shot – as it should be – in virtual silence. Nowhere in the movie do the descend to the intellectual depths of adding impossible sounds to the vacuum of space. The scene on Explorer being destroyed is one of the most astonishing things I’ve seen on-screen, as nail-biting as the plane crashes in “The Edge” and “Flight.” There are no explosions, no fireballs, no smoke, no high-energy detonations. What there is a lot of, however, is a lot of debris. A lot of things that clearly have *mass.* Things that interact with each other, and have inertia (including rotational momentum).

nope

And even while things are being torn apart, billion dollar machines are being converted into garbage and people are dying on-screen… it’s all just so beautiful.

The filmmakers spared no expense – or at least it looks that way – to depict realistic zero-gee. This includes several scenes within space stations, floating through modules filled with floating debris. A scene of Sandra Bullock in an airlock is particularly effective.

airlock

Water floating in space station modules. Zero-gravity *fire,* which might be the first serious depiction of on the big screen. Things that are tethered to each other whip around and snap back elastically, as would actually happen. A parachute is shown deployed in space (as result of taking impact damage); it is not a static thing, but flails around like a trapped jellyfish. Because, with no gravity and no air, there’s nothing to make it stop except the slow grind of friction.

Earth is ever-present, as you might expect. And unlike most movies, here Earth is not a big ball *painted* like Earth, but is instead an actual fully realized planet. The oceans are not a uniform shade of blue. The limb of the Earth has an atmospheric haze and a greenish glow at certain times; when orbiting over the night side of Earth, the aurora is clearly visible as are cities and other artificial lights.

Sandra Bullock’s character is the main one, and only one of three that you actually see alive (you hear a few others, including Ed Harris as the voice of Mission Control… a job he’s had before, and a barely-heard Greenland Inuk – which provides some truly heartbreaking moments). She does a fabulous job as a mission specialist just trying to survive. She’s not a Super Hero, nor is she a Useless Victim. She’s a Regular Joe caught up in horrible events, and she does a damned fine job of it.

In the end, the Orbital Mechanics Howlers mentioned at the beginning of the review don’t detract much from the staggering spectacle of the film. There is no sex, no drug use, no politics (apart, perhaps, from the plot element of the Russians blasting one of their satellites), only a little profanity, and no violence beyond the obvious.

Go see it. Go see it on a big screen. At some point in the nearish future I’m going to put the 250 miles on my car to go see it on an IMAX screen

 Posted by at 5:26 pm
Sep 192013
 

A long way from being complete. But here’s a look at diagrams being prepared for the article on the Model 2050E X-20 Dyna Soar. This will include not only the proposed operational versions, including bomber, shuttle, rescue, interceptor and so on, but also alternate launch vehicles. Since there has never been a really good layout diagram of the ultimate X-20 on the Titan III released, I’ve created one. Two, actually… the X-20 with just the transtage atop the Titan IIIc with the early UA-1205 boosters, and an operational Dyna Soar with external separation motors, cargo section and later UA-1205 motors. Additionally, Titan III with 156-inch boosters and Saturn C-IB concepts proposed by Boeing.

V3N4 drawings-Model

 

 Posted by at 8:58 pm
Jul 292013
 

A NASA painting of a 1969-vintage Space Shuttle concept. This was known as the “DC-3” configuration, and was designed – or at least heavily pushed – by Maxime Faget, and was adopted by several McDonnell-Douglas designs. It featured two manned and reusable rocket powered stages, both burning hydrogen & oxygen, both with straight wings. The smaller orbiter would basically “belly flop” into the atmosphere when re-entering. The straight wings would not provide a whole lot of lift, but they would also not be very massive. Thus the vehicles were relatively lightweight, but with restricted crossrange. Both stages also had turbofan engines mounted in the nose for cruise and landing assist.

 Posted by at 1:30 pm
Jun 242013
 

Some of the design features of the Grumman Design 619. Compared to the Shuttle Orbiter as actually built, the most obvious difference is the inclusion of the air breathing propulsion system model that consumes about 1/3 of the payload bay. Also note the RCS modules on the wingtips, the outward-bowing payload handlers station, nose airlock and the solid abort rockets along the aft fuselage.

 Posted by at 6:55 am