Orbcomm G2 (x11) - Falcon 9 v1.2 - Canaveral SLC-40 - 22.12.2015 01:29 UTC

Автор Salo, 08.09.2015 13:36:07

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Salo

#60
Цитировать Elon Musk Подлинная учетная запись ‏@elonmusk
@PaigeANjax -340 F in this case. Deep cryo increases density and amplifies rocket performance. First time anyone has gone this low for O2.
17:34 - 17 дек. 2015 г.
-340°F это -207°C. Температура кипения кислорода -183°C, а затвердевания - 219°C.

ЦитироватьLuke ‏@lukealization 4 часа назад
@elonmusk Are you chilling RP-1 also?
 
  Elon Musk Подлинная учетная запись ‏@elonmusk  4 часа назад
@lukealization yes, from 70F to 20 F
Керосин охлаждают до -7°C.
"Были когда-то и мы рысаками!!!"

Salo

http://blog.orbcomm.com/orbcomm-og2-mission-2-launch-update/
ЦитироватьDecember 18, 2015 (8:45 a.m. ET)
 The Falcon 9 rocket remains vertical at Space Launch Complex 40 at Cape Canaveral Air Force Station. The teams will continue working towards a static fire today to verify the rocket's readiness and aim towards launching a few days after the static fire is completed.
"Были когда-то и мы рысаками!!!"

Salo

#62
Цитировать Jeff Foust ‏@jeff_foust
Jeff Foust Ретвитнул(а) SpaceNews
Hearing SpaceX is working towards a Sunday launch, pending the outcome of today's static fire; backup date Tuesday.

Jeff Foust добавил(а),
 SpaceNews @SpaceNews_Inc
FAA Moves Closer to Approving Falcon 9 Landings at Cape Canaveral - http://spacenews.com http://spacenews.com/faa-moves-closer-to-approving-falcon-9-landings-at-cape-canaveral/...
 9:21 - 18 дек. 2015 г.
"Были когда-то и мы рысаками!!!"

Salo

http://spacenews.com/faa-moves-closer-to-approving-falcon-9-landings-at-cape-canaveral/
ЦитироватьFAA Moves Closer to Approving Falcon 9 Landings at Cape Canaveral
by Jeff Foust — December 18, 2015

A SpaceX illustration of a Falcon booster returning to Cape Canaveral for landing. An FAA review found no environmental issues with those landing plans, bringing SpaceX closer to final approval for a landing attempt. Credit: SpaceX  
 
WASHINGTON — A Federal Aviation Administration environmental review found no issues with plans by SpaceX to land its Falcon 9 first stage at Cape Canaveral, bringing the company a step closer to winning final approval to attempt such a landing on an upcoming launch.
The FAA, in a document formally known as a finding of no significant impact, concluded there would be no major environmental issues linked to SpaceX's plans to land Falcon 9 first stages at a decommissioned launch site the company now calls Landing Complex 1.
"After reviewing and analyzing available data and information on existing conditions and potential impacts," the document states, "the FAA has determined issuance or modification of a launch license to conduct Falcon landings at [Cape Canaveral Air Force Station] would not significantly affect the quality of the human environment" as defined in federal law.
The document, signed Dec. 4 by FAA Associate Administrator for Commercial Space Transportation George Nield and posted on the agency's website, reviewed various environmental factors associated with the proposed landings, including air quality, noise and visual impacts. None of the factors, the FAA concluded, posed a significant environmental impact.
The document notes that final approval from the FAA for a Falcon 9 first stage landing would require either a new launch license or a modification to an existing launch license. An environmental review, such as the one completed by the FAA, is one part of the overall launch license application process.
SpaceX currently has launch licenses for several upcoming missions, including the launch of 11 Orbcomm satellites planned for this month. Those licenses will require modifications regardless of plans to land the first stage since they refer to the Falcon 9 version 1.1, whereas SpaceX plans to use the upgraded Falcon 9 on those launches.
Neither the FAA nor SpaceX have commented publicly on any requests by SpaceX to modify existing launch licenses or seek new launch licenses, either to accommodate an attempted landing or to take into account the use of the upgraded Falcon 9. They have also not disclosed how soon before the launch the FAA would have to approve a new or revised launch license.
Any attempted landing by the Falcon 9 first stage at Cape Canaveral would also require range approval from the U.S. Air Force. Sources at Cape Canaveral have said the Air Force has informed them that the overall launch complex will be closed to non-essential personnel for a landing.
The date of SpaceX's next launch is uncertain. The company previously announced it would conduct a static fire test of the Falcon 9 on its launch pad Dec. 16, followed by a launch attempt about three days later. However, that test was postponed first to Dec. 17, and then to Dec. 18.
SpaceX Chief Executive Elon Musk, in a tweet late Dec. 17, suggested delays in the static fire test were linked to plans to chill the rocket's liquid oxygen propellant to colder temperatures than previous launches. "Deep cryo liquid oxygen presenting some challenges," he wrote.
Cooling the liquid oxygen to temperatures of less than –205 degrees Celsius is designed to make the propellant denser and improve its performance. "We're cooling the propellant, particularly the liquid oxygen because it's two-thirds liquid oxygen, close to its freezing point," Musk said in a Dec. 15 speech at the Fall Meeting of the American Geophysical Union in San Francisco when discussing upgrades to the Falcon 9.
Musk said this is the first time someone has attempted to use liquid oxygen chilled to those temperatures in a launch vehicle. He added that, despite the difficulties SpaceX was experiencing on the pad at Cape Canaveral, they successfully demonstrated it at the company's Texas test site.
Others in the industry, however, are skeptical of the benefits of supercooled propellants. "That's why we don't bother. Lots of complexity for little gain," tweeted George Sowers, vice president of advanced concepts and technologies at United Launch Alliance, in response to Musk's tweet early Dec. 18.
"Были когда-то и мы рысаками!!!"

Salo

#64
Цитировать Chris B - NSF ‏@NASASpaceflight
Chris B - NSF Ретвитнул(а) ORBCOMM
NET Sunday launch window is understood to be 20:02 to 23:02 Eastern...if they successfully static fire today.
 6:01 - 18 дек. 2015 г.
"Были когда-то и мы рысаками!!!"

Pirat5

Похоже Маск пытается приурочить пуск (с учётом возможных переносов - backup date Tuesday) к празднику - 25дек.
Последний раз "пуск на юбилей" получился совсем не очень...

Salo

#66
Цитировать Elon Musk ‏@elonmusk 19 минут назад
Aborted on ignition timing due to slow ground side valve. Adjusting ignition sequence by 0.6 secs for next attempt.

Elon Musk ‏@elonmusk 57 минут назад
About 2 mins from static fire
 
  Elon Musk ‏@elonmusk 2 часа назад
Abort triggered by flight computer on upper stage throttle valve. Adjusting thresholds and restarting count at T-10 mins.

Elon Musk ‏@elonmusk 2 часа назад
5 mins from static fire test
"Были когда-то и мы рысаками!!!"

Salo

Цитировать Elon Musk ‏@elonmusk  28 мин28 минут назад
Rounding up to 1 sec for a bit of timing margin. Updating flight computer command sequence ...
"Были когда-то и мы рысаками!!!"

Salo

Цитировать Chris B - NSF ‏@NASASpaceflight  
Falcon 9 OG2 launch notice documentation now showing *instantaneous* window on Dec. 20 as 20:29 Eastern. Dec 22 is 15 minute window.
"Были когда-то и мы рысаками!!!"

Salo

#69
Цитировать Chris B - NSF ‏@NASASpaceflight
KSC received an exclusion zone notice in anticipation of the Falcon 9 first stage land landing. Updated article: http://www.nasaspaceflight.com/2015/12/spacex-static-fire-falcon-9-og-2-rtf/ ...
"Были когда-то и мы рысаками!!!"

Salo

Нет. Очень напоминает историю с первым пуском Союза-2-1В. Переохлаждённый кислород подносит сюрпризы.
"Были когда-то и мы рысаками!!!"

Salo

Цитировать Elon Musk Подлинная учетная запись ‏@elonmusk
 Static fire test looks good. Pending data review, will aim to launch Sunday.
  16:09 - 18 дек. 2015 г.  
"Были когда-то и мы рысаками!!!"

Salo

#72
Пуск ожидается 21 декабря в 04:29 ДМВ.
"Были когда-то и мы рысаками!!!"

Salo

"Были когда-то и мы рысаками!!!"

Salo

ЦитироватьИлон Маск: запуск ракеты Falcon 9 может состояться 20 декабря
05:59 19.12.2015 (обновлено: 06:08 19.12.2015)
Обновленная Falcon 9 впервые после аварии должна вывести на орбиту 11 спутников нового поколения OG2 телекоммуникационной компании Orbcomm.

© AP Photo/ John Raoux

ВАШИНГТОН, 19 дек – РИА Новости. Первый запуск ракеты-носителя Falcon 9 компании SpaceX после произошедшей в июне катастрофы может состояться 20 декабря, ракета должна вывести на орбиту 11 спутников связи, сообщил владелец компании SpaceX Илон Маск.
В пятницу на космодроме на мысе Канаверал (штат Флорида) прошло огневое испытание двигателей первой ступени ракеты. Несмотря на то, что в ходе испытания Маск несколько раз сообщал о технических сложностях, по его итогам он написал в своем Twitter аккаунте: "статистическое огневое испытание выглядит хорошо". "Ожидаем анализа данных, будем нацеливаться на запуск в воскресенье", — написал предприниматель.​
Обновленная Falcon 9 должна вывести на орбиту 11 спутников нового поколения OG2 телекоммуникационной компании Orbcomm.
Ранее глава SpaceX заявил о том, что ракета была значительно модернизирована после произошедшей в июне катастрофы, когда в результате аварии на старте был также потерян космический грузовик Dragon. Пока неизвестно, намерена ли SpaceХ предпринимать очередную попытку сохранить для повторного использования первую ступень ракеты-носителя в ходе первого старта ее улучшенной модели.
Частная космическая компания SpaceX по контракту с НАСА осуществляет запуски грузового аппарата Dragon к МКС. Первый после крушения запуск грузовой капсулы Dragon при помощи Falcon 9 намечен на январь 2016 года.
"Были когда-то и мы рысаками!!!"

Apollo13

https://twitter.com/elonmusk/status/678152249369952258
ЦитироватьCurrently looking good for a Sunday night (~8pm local) attempted orbital launch and rocket landing at Cape Canaveral

silentpom

коллеги, вики пишет немного странное
ORBCOMM has reached an agreement with SpaceX to launch 18 satellites on its Falcon 9 rockets, for a cost of $42.6 million, by July 2014
что-то совсем неприличные цены. или Маск расчитывает использовать севшую ступень повторно для коммерческих запусков, а не только для испытаний

Salo

Их должны были запускать с помощью F1 и  гораздо раньше. Видимо выторговали скидку.
"Были когда-то и мы рысаками!!!"

Salo

http://spaceflightnow.com/2015/12/19/spacex-plans-to-return-falcon-9-rocket-to-flight-sunday/   
ЦитироватьSpaceX plans to return Falcon 9 rocket to flight Sunday       
Posted on December 19, 2015 by Stephen Clark

SpaceX's Falcon 9 rocket, standing 229 feet tall, on its Cape Canaveral launch pad earlier this week. Credit: SpaceX
 
SpaceX says Sunday is the target launch date for the first launch of a remodeled version of its Falcon 9 rocket, and the launcher's first mission since a June failure, after completing a practice countdown and engine ignition test Friday.
The mission's firsts, including a possible landing attempt for the Falcon 9's first stage, make it a critical launch for SpaceX as the company simultaneously resumes flying its fully-booked manifest, debuts a new generation Falcon booster, and continues a lengthy research and development initiative into rocket reusability.
Sunday's launch attempt is timed for 8:29 p.m. EST (0129 GMT Monday) fr om Cape Canaveral's Complex 40 launch pad.
Спойлер
Sources said only an instantaneous launch opportunity is available Sunday due to restrictions imposed by the Federal Aviation Administration, which may be hesitant to re-route holiday week air traffic around the Cape Canaveral launch base for several hours in case of launch delays.
SpaceX and FAA officials did not comment on the launch window constraints for Sunday, but the federal regulatory agency has refused to approve commercial launch attempts on busy travel days before, including a 2013 SpaceX flight that tried to blast off on several days around Thanksgiving.
Elon Musk, SpaceX's founder and CEO, announced late Friday the completion of a static fire engine test with the Falcon 9 rocket on its Florida launch pad. The static fire was set for Wednesday, but launch crews ran into problems that delayed the critical preflight milestone to Friday just before 7 p.m. EDT (0000 GMT Saturday).
In a post to his Twitter account, Musk said the launch is on track for Friday, one day later than previously disclosed.
Saturday's launch window extended three hours, but Sunday's is shortened to one instant.
The launch is pending a final data review of the results of Friday's static fire, Musk said.
Eleven satellites owned by Orbcomm, a New Jersey-based communications company, are fastened on top of the 229-foot-tall Falcon 9 rocket. They will join five identical spacecraft launched on a Falcon 9 mission in July 2014 to complete deployment of Orbcomm's second-generation, or OG2, satellite network designed to relay messages and help owners track shipments around the world.
Orbcomm says one of six satellites sent up in 2014 has since failed in orbit.
The mission will steer the 11 Orbcomm satellites, each about 380 pounds, into an orbit approximately 400 miles above Earth. Once the 11 satellites separate from an adapter ring atop the Falcon 9's second stage, the upper stage Merlin engine is programmed to restart for a demonstration maneuver for future missions requiring multiple burns.

Orbcomm's 11 satellites ready for launch aboard the Falcon 9 rocket are seen here attached to their dispenser before encapsulation inside the Falcon 9 fairing. Credit: Orbcomm
 
SpaceX's Falcon 9 rocket has been grounded since a mishap shortly after a June 28 launch destroyed a commercial Dragon supply ship with cargo heading for the International Space Station.
The launch failure, coupled with efforts to qualify an upgraded Falcon 9 configuration for flight, stalled Falcon 9 missions for nearly six months.
Sunday's return-to-flight launch will carry several upgrades to the Falcon 9 rocket, including Merlin 1D engines rated for higher thrust levels.
Each of the Falcon 9's nine Merlin 1D engines, affixed to the base of the booster in an "octaweb" arrangement, will generate 170,000 pounds of thrust at sea level. The engines will collectively produce more than 1.5 million pounds of thrust.
The older generation Falcon 9 rocket had first stage engines that ramped up to a maximum power level of 147,000 pounds of thrust, or 1.3 million force-pounds when firing together.
A space-rated Merlin engine on the upper stage will have a maximum 210,000 pounds of thrust in vacuum, and it features a lengthened nozzle and extended tanks. The interstage connecting the Falcon 9's first and second stages is also changed to accommodate the new Merlin vacuum nozzle, which has a center pusher to aid stage separation, according to space industry officials.
Another feature of the new-generation Falcon 9 is it will fly with condensed propellant, allowing engineers to load extra fuel into the rocket. Like earlier versions of the Falcon 9, the rocket consumes liquid oxygen and RP-1 fuel, a type of refined kerosene.
That works by chilling the liquid oxygen and RP-1 fuel mixture to colder temperatures, packing the propellant molecules closer together to free up room for additional fuel.
Musk said the densified liquid oxygen on the upgraded Falcon 9 is chilled to minus 340 degrees Fahrenheit, colder than typical launch-grade liquid oxygen at minus 298 degrees. The RP-1 fuel will fly at 20 degrees Fahrenheit, down from the room temperature 70-degree level more commonly used in rocketry.
He tweeted late Thursday the colder liquid oxygen was "presenting some challenges," during that day's static fire attempts, but Musk did not elaborate on the issues, adding that it was the first time a rocket would launch with oxidizer at such cold temperatures.

Phil McAlister, head of NASA's commercial spaceflight office, presented this chart at a recent NASA Advisory Council meeting illustrating changes introduced on the full-thrust version of the Falcon 9 rocket. The rocket is shown in a configuration with a Dragon crew capsule. Credit: NASA/Phil McAlister
 
"There a number of improvements in the rocket, and one of the things we're doing for the first time — the first time I think anyone's done it — is deeply cryogenic propellant," Musk said in remarks Tuesday at the fall meeting of the American Geophysical Union in San Francisco. "We're sub-cooling the propellant, particularly the liquid oxygen because it's two-thirds liquid oxygen, close to its freezing point, which increases the density quite significantly.
"The thrust is higher, we've improved the stage separation system, we stretched the upper stage of the rocket to add more propellant to that," Musk said. "There are a number of other improvements in electronics. It's, I think, a significantly improved rocket from the last one."
The design modifications increase the rocket's height by about 5 feet — to 229 feet — and boost the Falcon 9's performance by about 30 percent, officials said.
The upgrades allow the Falcon 9 to lift heavier communications satellites into geostationary transfer orbit, and still have enough reserve propellant to attempt landing. Earlier missions with payloads going to such orbits flew in expendable mode and did not try for a controlled descent to an ocean-going barge in the Atlantic Ocean.
SpaceX was working on the upgraded rocket before the June launch failure, the first in 19 flights of the Falcon 9.
SpaceX's two chief rivals — United Launch Alliance in the U.S. market and Arianespace in the international launch business — are paying attention to Sunday's flight.
George Sowers, ULA's vice president of advanced concepts and technologies, responded early Friday to Musk's comments on Twitter regarding the issues supercooled liquid oxygen: "That's why we don't bother. Lots of complexity for little gain."
Arianespace chief executive Stephane Israel told Spaceflight Now in an interview that he wishes SpaceX the best on the return-to-flight mission.
"Launching can be tricky," Israel said. "There was a former CEO of Arianespace and CNES — Frédéric d'Allest — a very impressive guy, who always said that in our business, it is a business wh ere failure and success are the closest. One little thing can make a difference and change the outcome of the mission.
"Our main competitor has a huge backlog to deliver in the coming two years," Israel said. "What will not be easy on their side will be to do three things at the same time: keep innovating; launch as often as possible; and not fail. This is their challenge. We have our own challenges obviously."

This frame from a SpaceX animation of a rocket landing shows a Falcon 9 booster descending under the power of its center engine. Credit: SpaceX
 
The third objective of Sunday's flight — classified as purely experimental — will be to recover the Falcon 9's booster stage a few minutes after liftoff, perhaps at a landing pad near the eastern tip of Cape Canaveral leased by SpaceX from the U.S. Air Force.
SpaceX has not officially disclosed whether the rocket will head for the landing pad on the Florida coast or the company's landing barge, or drone ship, positioned in the Atlantic Ocean.
Falcon 9 boosters have attempted controlled landings on the drone ship before, using three brief ignitions of a subset of its nine engines to guide itself to the barge and slow down to a vertical descent as landing legs extend for touchdown.
The rocket has reached the drone ship both times it tried, but SpaceX has not stuck the landing. The rocket tipped over and broke apart in a fireball, and SpaceX executives have said the rocking motion of the football field-sized platform adds another challenge to the ocean landings, despite taking special measures with underwater control thrusters to keep the ship stable.
SpaceX is not the only space company vying for a reusable rocket.
Blue Origin, a firm founded by Amazon.com's Jeff Bezos, launched a suborbital rocket to the edge of space in November from West Texas and successfully landed it a few minutes later in a similar manner to SpaceX's vertical descent method.
Bezos and Musk disagreed on whether landing the Falcon 9 or Blue Origin's New Shepard rocket is more technically daunting, but Bezos' company chalked up the first-ever safe return of a commercial vehicle that took off under its own power and flew into space.
SpaceX hopes to retrieve a used rocket and run it through inspections and tests on the ground before reuse. If the booster could be recycled and flown again, SpaceX says launch costs will come down.
"With reusable rockets, we can reduce the cost of access to space by probably two orders of magnitude," Musk said.
A notice sent to employees at the Kennedy Space Center and Cape Canaveral Air Force Station said SpaceX may attempt a landing at the spaceport, and it detailed road closures beyond those typically shut down for a launch, potentially due to the landing try.
A spokesperson for the Air Force's 45th Space Wing, the unit responsible for the the Cape Canaveral launch range, declined comment on additional safety precautions that might be taken for the unprecedented rocket landing, if it occurs.
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"Были когда-то и мы рысаками!!!"

Salo

"Были когда-то и мы рысаками!!!"