SpaceX Dragon Launch Slides to May 19

April 30, 2012 static fire test of Falcon 9 rocket at Pad 40 in Cape Canaveral. Credit: SpaceX

[/caption]SpaceX has announced that the upcoming launch of the firms Falcon 9 and Dragon spacecraft on the commercial COTS 2 mission has been postponed to a new target date of no earlier than May 19 with a backup launch date of May 22.

On May 19, the Falcon 9 rocket would lift off on its first night time launch at 4:55 a.m. EDT (0855 GMT) from Space Launch Complex-40 on Cape Canaveral Air Force Station in Florida.

Two launch opportunities had been available this week on May 7 and May 10, following the most recent slip from April 30.

SpaceX managers made the decision – in consultation with NASA – to delay the COTS 2 launch in order to complete further highly critical testing and verifications of all the flight software requirements for the Dragon spacecraft to safely and successfully carry its mission of rendezvousing and docking with the International Space Station (ISS).

“SpaceX and NASA are nearing completion of the software assurance process, and SpaceX is submitting a request to the Cape Canaveral Air Force Station for a May 19th launch target with a backup on May 22nd,” said SpaceX spokesperson Kirstin Grantham.

“Thus far, no issues have been uncovered during this process, but with a mission of this complexity we want to be extremely diligent.”

May 10 was the last window of opportunity this week because of the pending May 14 blast off of a new Russian Soyuz TMA-04M capsule from the Baikonur Cosmodrome in Kazakhstan with three fresh crew members bound for the ISS which will restore the outpost to a full crew complement of 6 human residents.

The Falcon 9 and Dragon can only be launched about every three days.

The purpose of Dragon is to carry supplies up to and back from the ISS. Dragon is a commercial spacecraft developed by SpaceX and designed to replace some of the cargo resupply functions previously conducted by NASA’s fleet of prematurely retired Space Shuttle orbiters. At this moment the US has zero capability to launch cargo or crews to the ISS.

SpaceX Dragon approaches the ISS on 1st test flight and Station Docking in 2012. Astronauts will grapple it with the robotic arm and berth it at the Earth facing port of the Harmony node. Illustration: NASA /SpaceX

In response to the SpaceX announcement, NASA issued the following statement from from William Gerstenmaier, associate administrator for Human Exploration and Operations at the agency’s Headquarters in Washington:

“After additional reviews and discussions between the SpaceX and NASA teams, we are in a position to proceed toward this important launch. The teamwork provided by these teams is phenomenal. There are a few remaining open items, but we are ready to support SpaceX for its new launch date of May 19.”

SpaceX is under contract with NASA to conduct twelve resupply missions to the ISS to carry cargo back and forth for a cost of some $1.6 Billion.

Dragon is loaded with nearly 1200 pounds of non-critical cargo such as food and clothing on this flight.

The COTS 2 mission has been repeatedly delayed since the originally planned target of mid-2011 when SpaceX requested that the COTS 2 and 3 flights be combined into one mission to save time. The first Dragon docking to the ISS was initially planned for the COTS 3 mission.

This SpaceX Falcon 9 rocket inside the processing hanger at Pad 40 is due for liftoff on May 19, 2012 to the ISS. Credit: Ken Kremer/www.kenkremer.com

Ken Kremer

SpaceX Static Test Fire a Success

SpaceX engineers prepare for the launch at SpaceX's launch control center in Cape Canaveral. Credit: SpaceX.

It was short but sweet. SpaceX conducted a 2-second static fire test of their Falcon 9 rocket that will send the first COTS flight to the International Space Station. “Woohoo, rocket hold down firing completed and all looks good!!” Tweeted SpaceX CEO and founder Elon Musk. SpaceX’s Twitter feed said with the successful firing, engineers will now review data as they continue to prepare for the upcoming mission, slated to launch on May 7.

A first attempt was aborted with 30 seconds left in the countdown, due to “overly restrictive redline on second stage engine position.” Engineers recycled all the rocket’s systems and began another countdown.

Fire and smoke erupted just briefly from the base of the rocket, and there seemed to be a bit of confusion on the webcast, as the word “abort” was used, but then there was word of success and the webcast ended abruptly.

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For the static fire test, the nine Merlin engines on the first stage of the Falcon 9 rocket were ignited at 20:15 UTC (4:15 p.m. EDT). The test was part of a full dress rehearsal for the SpaceX team. Last week was a final full simulation between NASA and SpaceX for the series of demonstration maneuvers and tests the Dragon capsule will make as it approaches the ISS; then the astronauts on board will capture and berth the cargo capsule to the Harmony module’s Earth-facing docking port.

If the abort problem had occured on the launch day, there would be no second attempt; there is no recycling of the systems for an actual launch. Additionally, the Falcon 9 can only attempt launch every 3 days because of limited propellant on Dragon capsule. SpaceX needs to ensure there is enough propellant on board Dragon for the pre-berthing maneuvers and tests.

If the Falcon 9 launch is delayed by weather or technical problems, another attempt could be made on May 10, but after that they would have to until after the launch of a Russian Soyuz spacecraft that will bring three new crew members to the space station. That mission is scheduled for launch from the Baikonur Cosmodrome in Kazakhstan on May 14, and would dock two days later.

The launch of the Falcon 9 and Dragon has been delayed from its initial planned flight in February, but with today’s apparently successful test, SpaceX and NASA are hopeful for going forward with next week’s launch.

SpaceX is one of two companies, along with Orbital Sciences, competing for contracts to deliver cargo to low Earth orbit for NASA under the Commercial Orbital Transportation System program.

The launch is currently set for 13:38 UTC (9:38 a.m. EDT) on Monday.

SpaceX Falcon 9 Set for Critical Engine Test Firing on Monday, April 30

The SpaceX Dragon spacecraft rests on top of the Falcon 9 rocket at SpaceX’s launch site in Cape Canaveral, FL. Credit: SpaxeX

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On Monday, April 30, SpaceX (Space Exploration Technologies) is all set to conduct a critical static engine test fire of the Falcon 9 rocket at the firm’s launch pad on Cape Canaveral, Florida.

If all goes well, SpaceX and NASA are targeting a May 7 liftoff of the rocket and Dragon spacecraft at 9:38 AM, bound for the International Space Station (ISS). This launch signifies the first time that a commercial company is attempting to dock at the ISS.

The Falcon 9 rocket with the Dragon bolted on top was rolled out to the pad at Space Launch Complex 40 (SLC-40) on the transporter-erecter on Sunday morning (April 29), SpaceX spokesperson Kirstin Grantham told Universe Today.

“The Falcon 9 is vertical. Fueling begins Monday,” said Grantham.

On Sunday night, SpaceX CEO Elon Musk tweeted: “Dragon review completed. All systems now ready for full thrust hold down firing on Monday.”

Today the 180 foot long rocket was moved about 600 feet on rail tracks from the processing hanger to Pad 40 in anticipation of the engine test firing.

During the hotfire test, all nine of the powerful liquid fueled Merlin 1C first stage engines will be ignited at full power for two seconds as part of a full launch dress rehearsel for the flight, dubbed COTS 2. SpaceX engineers will run through all launch procedures on Monday as though this were an actual launch on launch day.

This is the second Falcon 9 launch for NASA as part of the agency’s Commercial Orbital Transportation Services program designed to enable commercial firms to deliver cargo to the ISS following the retirement of NASA’s fleet of Space Shuttles. The first Falcon 9 COTS test flight took place in December 2010.

The Dragon spacecraft being rotated before it is mated to the Falcon 9 rocket in SpaceX’s hangar in Cape Canaveral, FL. CREDIT: NASA

You can watch a live webcast of the engine test at www.spacex.com starting at 2:30 PM ET/ 11:30 AM PT, with the actual static fire targeted for 3:00 PM ET/ 12:00 PM PT according to SpaceX.

SpaceX is under contract to NASA to conduct twelve resupply missions to the ISS to carry cargo back and forth for a cost of some $1.6 Billion.

This SpaceX Falcon 9 rocket inside the processing hanger at Pad 40 is due for liftoff on May 7, 2012 to the ISS. The Falcon 9 booster was moved on rail tracks to the pad on April 29 and the Merlin 1C first stage engines (at right) will be test fired on April 30. Credit: Ken Kremer

How to Capture a Dragon in Space

André Kuipers during training with Canadarm2 (Credit: ESA/NASA)

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With the upcoming historic launch of the SpaceX Dragon capsule to the International Space Station, astronauts in orbit have been getting ready for the first commercial spacecraft that will bring supplies to the station. Astronauts Don Pettit and André Kuipers will be manually capturing and berthing the Dragon capsule, using the ISS’s Canadarm2. Originally, current station commander Dan Burbank was to be the main arm operator, but with the delay in Dragon’s launch (it was originally scheduled for February 2012), Burbank will already be back on Earth by the time Dragon reaches the station, currently scheduled for May 3. So now, Pettit and Kuipers have had to take over the duties and learn their new jobs while in space. Without the high-tech simulators that NASA has at Johnson Space Center, how do the astronauts prepare and practice for this important event?

“We have a really neat capability here on Station,” Pettit said during a press conference last week. “I have it set up all the time, so I wake up in the morning and have a bag of coffee in my mouth and a cinnamon scone in one hand and flying the simulator with the other.”

The crew actually has two ways to practice for Dragon’s arrival.

“One is actually flying (practicing with) the Canadarm, which is the world’s best trainer,” Pettit said, “and then on station we have two space station computers which double as an Arm simulator, and it has a full set of the Arm hand controllers – the setup, which we call Robot allows us to fly track and capture trajectories just as if we were in the simulators in Houston.”

Initially Burbank would have been the main arm officer, with Pettit and Kuipers assisting. Now, Pettit and Kuipers will have to complete the task themselves, with the two of them doing all the things that the three of them were originally trained to do.

For the capture and berthing, Pettit and Kuipers will be in the Cupola, with Pettit as prime operator and Kuipers as second arm operator. “We will have arm operation in the (Destiny) lab as a ‘hot backup’ just in case of contingencies, and we can activate it there if needed.”

The two astronauts will use the Station’s Canadarm2 to first grab the spacecraft and then maneuver it into place to mate with the Harmony module’s Earth-facing docking port.

Pettit said the on-orbit training has been invaluable. “It is really good to have that type of capability,” he said.

The following animation from the Canadian Space Agency shows just how complex it is to capture a Dragon in space.

SpaceX’s launch and Dragon’s arrival will be the premiere test flight in NASA’s new strategy to resupply the ISS with privately developed rockets and cargo carriers under the Commercial Orbital Transportation Services (COTS) initiative. Even though it is technically a est flight, NASA isn’t about to pass up an opportunity to send supplies to the station. Dragon will carry about nearly 521 kg (1,150 pounds) of cargo, mainly food and some spare parts for the ISS. When Dragon departs, the station crew will load nearly 680 kg (1,500 pounds) of cargo to be sent back to Earth, since the Dragon capsule won’t burn up in the atmosphere like other supply ships — it will be recovered in the ocean.

SpaceX’s Elon Musk Talks Space on the Daily Show with Jon Stewart

Elon Musk. Credit: SpaceX

As Jon Stewart from the Daily Show noted (although not quite correctly), four entities have launched rockets into space: the US, China, the Soviet Union (Russia) and Elon Musk. “Well, it wasn’t just me,” Musk replied humbly. Watch the entire interview here of Elon Musk on the Daily Show, where he discusses SpaceX’s upcoming test flight of their unmanned Dragon capsule to the International Space Station, sending humans to Mars, energy problems, and whether he is one of the X-Men.

Part 2 is below:
Continue reading “SpaceX’s Elon Musk Talks Space on the Daily Show with Jon Stewart”

SpaceX’s Dragon, Now With Seating for Seven

Inside the SpaceX Dragon capsule, testing out the seating arrangement for a crew of seven. Test crew included (from top left): NASA Crew Survival Engineering Team Lead Dustin Gohmert, NASA Astronaut Tony Antonelli, NASA Astronaut Lee Archambault, SpaceX Mission Operations Engineer Laura Crabtree, SpaceX Thermal Engineer Brenda Hernandez, NASA Astronaut Rex Walheim, and NASA Astronaut Tim Kopra. Photo: Roger Gilbertson / SpaceX

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So much for the idea that space capsules are cramped and can only carry a limited crew. SpaceX revealed a prototype for their new crew cabin design, as they conducted a joint daylong review with NASA of the Dragon crew vehicle layout. In this configuration, the Dragon will be able to carry a crew of seven, the same number the space shuttle could carry. Using a Dragon engineering model equipped with seats and representations of crew systems, they were able to get assessments and feedback from engineers and four NASA astronauts on interior amenities such as lighting, environmental control and life support systems, displays, cargo racks, and the all important seating system. The evaluators participated in human factors assessments which covered entering and exiting Dragon under both regular and emergency (that’s ‘off-nominal’ in NASA-speak) scenarios, as well as reach and visibility evaluations.

See more images from the review, below, along with a video from the initial tests of the SuperDraco engines that will power the launch escape system.

Plus, as a heads-up, SpaceX CEO Elon Musk will be on the US television show “60 Minutes” on Sunday, March 18, 2012. You can see a preview here, (which includes a touching scene of Musk talking about his heroes) and check your local listings here.


NASA Astronaut Rex Walheim, SpaceX CEO and Chief Designer Elon Musk and SpaceX Commercial Crew Development Manager and former NASA Astronaut Garrett Reisman standing inside the Dragon spacecraft during testing activities. Credit: SpaceX.

Even with all seven crewmembers in their seats, there is enough interior space for three additional people to stand and assist the crew with their launch preparations — or for the CEO to kibitz with the crew.

SpaceX and NASA conducted a daylong review of the Dragon crew vehicle layout using the Dragon engineering model equipped with seats and representations of crew systems. Photo: SpaceX

The seven seats mount to strong, lightweight supporting structures attached to the pressure vessel walls. Each seat can hold an adult up to 1.95 meters tall (6 feet 5 inches) and weighing 113 kg (250 lbs), and has a liner that is custom-fit for each crewmember.

SpaceX Completes Important “Wet Dress” Rehearsal Test for Upcoming Flight to Space Station

Photo from the successful Falcon 9 launch readiness test on March 1, 2012 in preparation for the upcoming mission to the International Space Station. Credit: SpaceX

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SpaceX successfully completed a key test of the Falcon 9 rocket that will fly the first commercial flight to the International Space Station. Called a ‘wet dress rehearsal,’ SpaceX brought the Falcon 9 “stack” with the Dragon capsule atop to the launch pad at Cape Canaveral on March 1, and loaded it with 76,000 gallons of highly refined kerosene and liquid oxygen fuel. Pre-liftoff operations were conducted as engineers went through a full count-down simulation, stopping at 5 seconds before ‘launch.’

SpaceX said the test was a success and was an important step on the road to the Space Station. “The test went well,” said SpaceX spokeswoman Kirstin Grantham. “Over the coming days, we will continue to review the data as we prepare for our upcoming mission.”

The launch of this historic flight will likely be April 20, or later, depending on the results of this and other tests.

After the wet dress rehearsal, the fuel was drained, and the rocket was later rolled off the launch pad on March 2, and the SpaceX said Dragon will be taken off for additional testing.

Dawn at Cape Canaveral during the wet dress rehearsal test. Credit: SpaceX and Elon Musk, via Twitter.

Additionally, on March 2, SpaceX conducted another test, called a 9-engine test, firing the engines for a future Falcon 9 rocket. This took place near McGregor, Texas.

As the “real” launch date approaches for the current rocket, the Falcon 9 will again be brought to the Launchpad to fire the nine first-stage engines and practice late packing of cargo in the Dragon.

“These rehearsals allow SpaceX to test out both the vehicle and the ground systems before launch,” Grantham said.

SpaceX is working towards becoming the first commercial spacecraft to dock with the ISS under NASA’s commercial orbital transportation services (COTS) commercial crew development (CCDev) programs. Later this year, another COTS company, Orbital Sciences hopes to launch their Antares rocket and Cygnus capsule from Wallops Island, Virginia.

SpaceX Test Fires SuperDraco Abort Engines Critical To Astronaut Launch Safety

SpaceX test-fires its SuperDraco engine that powers the manned Dragon spacecraft launch escape system critical for Astronaut safety during launch to orbit. Credit: SpaceX

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Space Exploration Technologies (SpaceX) has test fired a prototype of its new SuperDraco engine that will be critical to saving the lives of astronauts flying aboard a manned Dragon spacecraft soaring to orbit in the event of an in-flight emergency.

The successful full-duration, full-thrust firing of the new SuperDraco engine prototype was completed at the company’s Rocket Development Facility in McGregor, Texas. The SuperDraco is a key component of the launch abort system of the Dragon spacecraft that must fire in a split second to insure crew safety during launch and the entire ascent to orbit.

The Dragon spacecraft is SpaceX’s entry into NASA’s commercial crew development program – known as CCDEV2 – that seeks to develop a commercial ‘space taxi’ to launch human crews to low Earth orbit and the International Space Station (ISS).

The engine fired for 5 seconds during the test, which is the same length of time the engines need to burn during an actual emergency abort to safely thrust the astronauts away.

Watch the SpaceX SuperDraco Engine Test Video:

Nine months ago NASA awarded $75 million to SpaceX to design and test the Dragon’s launch abort system . The SuperDraco firing was the ninth of ten milestones that are to be completed by SpaceX by around May 2012 and that were stipulated and funded by a Space Act Agreement (SAA) with NASA’s Commercial Crew Program (CCP).

“SpaceX and all our industry partners are being extremely innovative in their approaches to developing commercial transportation capabilities,” said Commercial Crew Program Manager Ed Mango in a NASA statement. “We are happy that our investment in SpaceX was met with success in the firing of its new engine.”

Dragon will launch atop the Falcon 9 rocket, also developed by SpaceX.

SpaceX test-fires its SuperDraco engine that will eventually power the manned Dragon spacecrafts launch escape system critical for Astronaut safety during launch to orbit. Credit: SpaceX

“Eight SuperDracos will be built into the sidewalls of the Dragon spacecraft, producing up to 120,000 pounds of axial thrust to quickly carry astronauts to safety should an emergency occur during launch,” said Elon Musk, SpaceX chief executive officer and chief technology officer in a statement. “Those engines will have the ability to deep throttle, providing astronauts with precise control and enormous power.”

“Crews will have the unprecedented ability to escape from danger at any point during the launch because the launch abort engines are integrated into the side walls of the vehicle,” Musk said. “With eight SuperDracos, if any one engine fails the abort still can be carried out successfully.”

SuperDraco engines will power the launch escape system of SpaceX’s Dragon. Eight SuperDraco engines built into the side walls of the Dragon spacecraft will produce up to 120,000 pounds of axial thrust to carry astronauts to safety should an emergency occur during launch. Credit: SpaceX

SpaceX is one of four commercial firms working to develop a new human rated spacecraft with NASA funding. The other firms vying for a commercial crew contract are Boeing, Sierra Nevada and Blue Origin.

“SuperDraco engines represent the best of cutting edge technology,” says Musk. “These engines will power a revolutionarylaunch escape system that will make Dragon the safest spacecraft in history and enable it to land propulsively on Earth or another planet with pinpoint accuracy.”

The privately developed space taxi’s will eventually revive the capability to ferry American astronauts to and from the ISS that was totally lost when NASA’s Space Shuttle orbiters were forcibly retired before a replacement crew vehicle was ready to launch.

Because the US Congress slashed NASA’s commercial crew development funding by more than 50% -over $400 million – the first launch of a commercial space taxi is likely to be delayed several more years to about 2017. Until that time, all American astronauts must hitch a ride to the ISS aboard Russian Soyuz capsules.

This week the Russian manned space program suffered the latest in a string of failures when when technicians performing a crucial test mistakenly over pressurized and damaged the descent module of the next manned Soyuz vehicle set to fly to the ISS in late March, thereby forcing about a 45 day delay to the launch of the next manned Soyuz from Kazakhstan.

SpaceX Delays Upcoming 1st Dragon Launch to ISS

SpaceX Dragon approaches the ISS, so astronauts can grapple it with the robotic arm and berth it at the Earth facing port of the Harmony node. Illustration: NASA /SpaceX

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The first test launch of a commercially built spacecraft to the International Space Station has been delayed by its builder, Space Exploration Technologies or SpaceX, in order to carry out additional testing to ensure that the vehicle is fully ready for the high stakes Earth orbital mission.

SpaceX and NASA had been working towards a Feb. 7 launch date of the company’s Dragon spacecraft and announced the postponement in a statement today (Jan. 16).

A new target launch date has not been set and it is not known whether the delay amounts to a few days, weeks or more. The critical test flight has already been rescheduled several times and was originally planned for 2011.

The unmanned Dragon is a privately developed cargo vessel constructed by SpaceX under a $1.6 Billion contract with NASA to deliver supplies to the ISS and partially replace the transport to orbit capabilities that were fully lost following the retirement of the Space Shuttle in 2011.

“In preparation for the upcoming launch, SpaceX continues to conduct extensive testing and analysis, said SpaceX spokeswoman Kirstin Grantham in the statement.

“We [SpaceX] believe that there are a few areas that will benefit from additional work and will optimize the safety and success of this mission.”

“We are now working with NASA to establish a new target launch date, but note that we will continue to test and review data. We will launch when the vehicle is ready,” said Grantham.

This SpaceX Dragon will launch to the ISS sometime in 2012 on COTS2/3 mission. Protective fairings are installed over folded solar arrays, at the SpaceX Cape Canaveral launch site.

Dragon’s purpose is to ship food, water, provisions, equipment and science experiments to the ISS.

The demonstration flight – dubbed COTS 2/3 – will be the premiere test flight in NASA’s new strategy to resupply the ISS with privately developed rockets and cargo carriers under the Commercial Orbital Transportation Services (COTS) initiative.

The Dragon will blast off atop a Falcon 9 booster rocket also built by SpaceX and, if all goes well, conduct the first ever rendezvous and docking of a privately built spacecraft with the 1 million pound orbiting outpost.

After closely approaching the ISS, the crew will grapple Dragon with the station’s robotic arm and berth it to the Earth-facing port of the Harmony node.

“We’re very excited about it,” said ISS Commander Dan Burbank in a recent televised interview from space.

An astronaut operating the ISS robotic arm will grab Dragon and position it at a berthing port at the Harmony node. Illustration: NASA /SpaceX

Since the demonstration mission also involves many other first time milestones for the Dragon such as the first flight with integrated solar arrays and the first ISS rendezvous, extra special care and extensive preparatory activities are prudent and absolutely mandatory.

NASA’s international partners, including Russia, must be consulted and agree that all engineering and safety requirements, issues and questions related to the docking by new space vehicles such as Dragon have been fully addressed and answered.

William Gerstenmaier, NASA’s associate administrator for the Human Exploration and Operations Mission Directorate recently stated that the launch date depends on completing all the work necessary to ensure safety and success, “There is still a significant amount of critical work to be completed before launch, but the teams have a sound plan to complete it.”

“As with all launches, we will adjust the launch date as needed to gain sufficient understanding of test and analysis results to ensure safety and mission success.”

“A successful mission will open up a new era in commercial cargo delivery to the international orbiting laboratory,” said Gerstenmaier.

SpaceX is also working on a modified version of the spacecraft, dubbed DragonRider, that could launch astronaut crews to the ISS in perhaps 3 to 5 years depending on the amount of NASA funding available, says SpaceX CEO and founder Elon Musk

Read Ken’s recent features about the ISS and SpaceX/Dragon here:
Dazzling Photos of the International Space Station Crossing the Moon!
Solar Powered Dragon gets Wings for Station Soar
Absolutely Spectacular Photos of Comet Lovejoy from the Space Station
NASA announces Feb. 7 launch for 1st SpaceX Docking to ISS

Solar Powered Dragon gets Wings for Station Soar

SpaceX Dragon set to dock at International Space Station on COTS 2/3 mission. Falcon 9 launch of Dragon on COTS 2/3 mission is slated for Feb.7, 2012 from pad 40 at Cape Canaveral, Florida. Artist’s rendition of Dragon spacecraft with solar panels fully deployed on orbit. ISS crew will grapple Dragon and berth to ISS docking port. Credit: NASA

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The Dragon has grown its mighty wings

SpaceX’s Dragon spacecraft has gotten its wings and is set to soar to the International Space Station (ISS) in about a month. NASA and SpaceX are currently targeting a liftoff on Feb. 7 from Space Launch Complex 40 at Cape Canaveral Air Force Station in Florida.

Dragon is a commercially developed unmanned cargo vessel constructed by SpaceX under a $1.6 Billion contract with NASA. The Dragon spacecraft will launch atop a Falcon 9 booster rocket also built by SpaceX, or Space Exploration Technologies.

Dragon’s solar array panels being installed on Dragon’s trunk at the SpaceX hangar in Cape Canaveral,FL.

The Feb. 7 demonstration flight – dubbed COTS 2/3 – represents the first test of NASA’s new strategy to resupply the ISS with privately developed rockets and cargo carriers under the Commercial Orbital Transportation Services (COTS) initiative.

Following the forced retirement of the Space Shuttle after Atlantis final flight in July 2011, NASA has no choice but to rely on private companies to loft virtually all of the US share of supplies and equipment to the ISS.

The Feb. 7 flight will be the first Dragon mission actually tasked to dock to the ISS and is also the first time that the Dragon will fly with deployable solar arrays. The twin arrays are the primary power source for the Dragon. They will be deployed a few minutes after launch, following Dragon separation from the Falcon 9 second stage.

The solar arrays can generate up to 5000 watts of power on a long term basis to run the sensors and communications systems, drive the heating and cooling systems and recharge the battery pack.

SpaceX designed, developed and manufactured the solar arrays in house with their own team of engineers. As with all space hardware, the arrays have been rigorously tested for hundreds of hours under the utterly harsh conditions that simulate the unforgiving environment of outer space, including thermal, vacuum, vibration, structural and electrical testing.

SpaceX engineers conducting an early solar panel test. Hundreds of flood lamps simulate the unfiltered light of the sun. Photo: Roger Gilbertson/ SpaceX

The two arrays were then shipped to Florida and have been attached to the side of the Dragon’s bottom trunk at SpaceX’s Cape Canaveral launch processing facilities. They are housed behind protective shielding until commanded to deploy in flight.


Video Caption: SpaceX testing of the Dragon solar arrays. Credit: SpaceX

I’ve toured the SpaceX facilities several times and seen the Falcon 9 and Dragon capsule launching on Feb. 7. The young age and enthusiasm of the employees is impressive and quite evident.

NASA recently granted SpaceX the permission to combine the next two COTS demonstration flights into one mission and dock the Dragon at the ISS if all the rendezvous practice activities in the vicinity of the ISS are completed flawlessly.

Dragon with the protective fairings installed over the folded solar arrays, at the SpaceX

The ISS crew is eagerly anticipating the arrival of Dragon, for whch they have long trained.

“We’re very excited about it,” said ISS Commander Dan Burbank in a televised interview from on board the ISS earlier this week.

The ISS crew will grapple the Dragon with the station’s robotic arm when it comes within reach and berth it to the Earth-facing port of the Harmony node.

“From the standpoint of a pilot it is a fun, interesting, very dynamic activity and we are very much looking forward to it,” Burbank said. “It is the start of a new era, having commercial vehicles that come to Station.”

Burbank is a US astronaut and captured stunning images of Comet Lovejoy from the ISS just before Christmas, collected here.

Read recent features about the ISS and commercial spaceflight by Ken Kremer here:
Dazzling Photos of the International Space Station Crossing the Moon!
Absolutely Spectacular Photos of Comet Lovejoy from the Space Station
NASA announces Feb. 7 launch for 1st SpaceX Docking to ISS

Jan 11: Free Lecture by Ken at the Franklin Institute, Philadelphia, PA at 8 PM for the Rittenhouse Astronomical Society. Topic: Mars & Vesta in 3 D – Plus Search for Life & GRAIL