News from Space: Latest Tests and New Players

Apollo11_earthIn the new age of space travel and exploration, commercial space companies are not only boasting immense growth and innovation, but are reaching out to fill niche markets as well. In addition to launchers that can send orbiters and payloads into space, there are also new breeds of commercial satellites, new engines, and a slew of other concepts that promise to make the industry more promising and cost effective.

A case in point is the small satellite launch company Firefly Space Systems, which recently unveiled its planned Alpha launcher. Aimed at the small satellite launch market, it’s designed to launch satellites into low-Earth orbit (LEO) and Sun-synchronous orbits for broadband communication using an unconventional aerospike engine, it is also the first orbital launcher to use methane as fuel.

firefly-alphaThe Firefly Alpha is a specialized design to launch light satellites at low cost into low Earth Designed to carry payloads of up to 400 kg (880 lb), the Alpha features carbon composite construction and uses the same basic design for both of its two stages to keep down costs and simplify assembly. Methane was chosen because it’s cheap, plentiful, clean-burning and (unlike more conventional fuels) self-pressurizing, so it doesn’t require a second pressurization system.

But the really interesting thing about the two-stage rocket assembly is that the base of the engine is ringed with rocket burners rather than the usual cluster of rocket engines. That’s because, while the second stage uses conventional rocket engines, the first stage uses a more exotic plug-cluster aerospike engine that puts out some 400.3 kN (or 40,800 kg/90,000 lb)  of thrust.

firefly-alpha-4Aerospike engines have been under development since the 1960s, but until now they’ve never gotten past the design phase. The idea behind them is that rockets with conventional bell-shaped nozzles are extremely efficient, but only at a particular altitude. Since rockets are generally used to make things go up, this means that an engine that works best at sea level will become less and less efficient as it rises.

The plug aerospike is basically a bell-shaped rocket nozzle that’s been cut in half, then stretched to form a ring with the half-nozzle forming the profile of a plug. This means that the open side of the rocket engine is replaced with the air around it. As the rocket fires, the air pressure keeps the hot gases confined on that side, and as the craft rises, the change in air pressure alters the shape of the “nozzle;” keeping the engine working efficiently.

firefly-alpha-2The result of this arrangement is a lighter rocket engine that works well across a range of altitudes. Because the second stage operates in a near vacuum, it uses conventional rocket nozzles. As Firefly CEO Thomas Markusic put it:

What used to cost hundreds of millions of dollars is rapidly becoming available in the single digit millions. We are offering small satellite customers the launch they need for a fraction of that, around US$8 or 9 million – the lowest cost in the world. It’s far cheaper than the alternatives, without the headaches of a multi manifest launch.

Meanwhile, SpaceX has been making headlines with its latest rounds of launches and tests. About a week ago, the company successfully launched six ORBCOMM advanced telecommunications satellites into orbit to upgrade the speed and capacity of their existing data relay network. The launch from Cape Canaveral Air Force Station in Florida had been delayed or scrubbed several times since the original launch date in May due to varying problems.

spacex_rocketHowever, the launch went off without a hitch on Monday, July 14th, and ORBCOMM reports that all six satellites have been successfully deployed in orbit. SpaceX also used this launch opportunity to try and test the reusability of the Falcon 9′s first stage and its landing system while splashing down in the ocean. However, the booster did not survive the splashdown.

SpaceX CEO Elon Musk tweeted about the event, saying that the:

Rocket booster reentry, landing burn & leg deploy were good, but lost hull integrity right after splashdown (aka kaboom)… Detailed review of rocket telemetry needed to tell if due to initial splashdown or subsequent tip over and body slam.

SpaceX wanted to test the “flyback” ability to the rocket, slowing down the descent of the rocket with thrusters and deploying the landing legs for future launches so the first stage can be re-used. These tests have the booster “landing” in the ocean. The previous test of the landing system was successful, but the choppy seas destroyed the stage and prevented recovery. Today’s “kaboom” makes recovery of even pieces of this booster unlikely.

sceenshot-falcon9-580x281This is certainly not good news for a company who’s proposal for a reusable rocket system promises to cut costs exponentially and make a whole range of things possible. However, the company is extremely close to making this a full-fledged reality. The take-off, descent, and landing have all been done successfully; but at present, recovery still remains elusive.

But such is the nature of space flight. What begins with conceptions, planning, research and development inevitably ends with trial and error. And much like with the Mercury and Apollo program, those involved have to keep on trying until they get it right. Speaking of which, today marks the 45th anniversary of Apollo 11 reaching the Moon. You can keep track of the updates that recreate the mission in “real-time” over @ReliveApollo11.

As of the writing of this article, the Lunar module is beginning it’s descent to the Moon’s surface. Stay tuned for the historic spacewalk!

apollo11_descent

Sources: universetoday.com, gizmag.com

News from Space: Crimean Crisis Highlights US Dependence

crimean_crisis3The crisis in the Crimea continues, with Russia and the Ukraine threatening military action and the US and its western allies threatening sanctions. In addition to anxieties about the likelihood of war and the conflict spilling over into other regions, the crisis has served to highlight other possible global repercussions. And interestingly enough, some of them have to do with the current balance of space exploration and research.

In essence, every aspect of the manned and unmanned US space program – including NASA, other government agencies, private aerospace company’s and crucially important US national security payloads – is highly dependent on Russian & Ukrainian rocketry. Thus, all of the US space exploration and launches are potentially at risk amidst the current crisis.

SoyuzCompared to the possibility of an outbreak of war that could engulf the Eurasian triangle, this hardly seems terribly consequential. But alas, quite a few people stand to suffer from seeing all rockets grounded in the Ukraine and Russia as a result of the current climate. Consider the ISS, which is entirely dependent on Earth-based rockets for resupply and personnel rotation.

As it stands, astronauts on the International Space Station (ISS) ride to space and back on regularly scheduled launches, and each new rocket carried fresh supplies of food and equipment. The Atlas V and Antares rockets, plus critical U.S. spy satellites that provide vital, real time intelligence, are just some of the programs that may be in peril if events deteriorate, or worse yet, spin out of control.

ISSThe threat to intelligence gathering operations would be especially critical, since it would hamper efforts to monitor the crisis. In short, the Crimean confrontation and all the threats and counter threats of armed conflicts and economic sanctions shines a spotlight on US vulnerabilities regarding space exploration, private industry and US national security programs, missions, satellites and rockets.

But the consequences of escalating tensions would hardly be felt by only one side. Despite what some may think, the US, Russian and Ukrainian space programs, assets and booster rockets are inextricably intertwined and interdependent, and all would suffer if anything were to shut it down. For instance, some 15 nations maintain participation and funding to keep the ISS and its programs running.

ISS_crewAnd since the forced retirement of NASA’s space shuttle program in 2011, America has been dependent on Russia for its human spaceflight capability. ISS missions are most often crewed by American astronauts and Russian cosmonauts. And under the most recent contract, the US pays Russia $70 million per Soyuz seat, and both they and the Ukraine’s space programs are dependent on this ongoing level of investment.

The fastest and most cost effective path to restore America’s human spaceflight capability to low Earth orbit and the ISS is through NASA’s Commercial Crew Program (CCP) seeking to develop private ‘space taxis’ with Boeing, SpaceX and Sierra Nevada. But until such time as long-term funding can be guaranteed, the current arrangement will persist.

maven_launchWhen NASA Administrator Chales Bolden was asked about contingencies at a briefing yesterday, March 4, he responded that everything is OK for now:

Right now, everything is normal in our relationship with the Russians. Missions up and down are on target… People lose track of the fact that we have occupied the International Space Station now for 13 consecutive years uninterrupted, and that has been through multiple international crises… I don’t think it’s an insignificant fact that we are starting to see a number of people with the idea that the International Space Station be nominated for the Nobel Peace Prize.

At the same time, he urged Congress to fully fund CCP and avoid still more delays:

Let me be clear about one thing. The choice here is between fully funding the request to bring space launches back to the US or continuing millions in subsidies to the Russians. It’s that simple. The Obama administration chooses investing in America, and we believe Congress will choose this course as well.

spacex-dragon-capsule-grabbed-by-iss-canadarm-640x424At a US Senate appropriations subcommittee hearing on Defense, which was held yesterday to address national security issues, SpaceX CEO Elon Musk underscored the crucial differences in availability between the Falcon 9 and Atlas V in this excerpt from his testimony:

In light of Russia’s de facto annexation of the Ukraine’s Crimea region and the formal severing of military ties, the Atlas V cannot possibly be described as providing “assured access to space” for our nation when supply of the main engine depends on President Putin’s permission.

So, continuing operations of the ISS and US National Security are potentially held hostage to the whims of Russian President Vladimir Putin. And given that Russia has threatened to retaliate with sanctions of its own against the West, the likelihood that space exploration will suffer is likely.

?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????The Crimean crisis is without a doubt the most dangerous East-West conflict since the end of the Cold War. Right now no one knows the future outcome of the crisis in Crimea. Diplomats are talking but some limited military assets on both sides are reportedly on the move today.