Dragon C1 - Falcon 9 - 8.12.10 18:43 ДМВ - Canaveral

[Salo]

http://space.flatoday.net/

Friday, December 03, 2010
SpaceX will try a second Falcon 9 static fire Saturday[/size]

SpaceX has confirmed it will perform a test firing of a Falcon 9 rocket's engines Saturday between 9 a.m. and 3 p.m.

The company says launch of the rocket on Tuesday is still possible.

Today's static firing was targeted for 9 a.m. After delays for unspecified reasons, the nine first-stage engines appeared to light around 1 p.m. at Cape Canaveral Air Force Station's Launch Complex 40.

SpaceX said the test aborted at T minus 1.1 seconds due to high chamber pressure in one of the engines.

"We are reviewing data now and will make a second attempt tomorrow," a spokeswoman said.

posted by James Dean at 5:13 PM

[LRV_75]

А зачем нужна эта система удержания? Я сам слышал, что-то типа того, что сначала держат секунды три с полной тягой, а потом отпускают, но так и не понял, из-за чего. В голову приходит только проверка двигателей на полной тяге. Хотя Falcon проверяют заранее, да и за 3 секунды работы на полной мощности сколько топлива зазря потратится?

Не объясните чайнику преимущества, может я что-то упустил?

В голову сразу приходит история решения проблемы выходе на режим двигателей боковых блоков у семерки, но у Фалькона-9 боковых блоков нет. Значит скорее всего именно тестирование двигателей первой ступени на полной (или какой то промежуточной)  тяге. По поводу "топливо зазря": "Лучше поиметь проблемы на земле, чем в полете"

ps: Но я тоже возможно что то упустил  :wink:

[Петр Зайцев]

Вот что говорит первоисточник в Руководстве Пользователя Полезных Нагрузок, 1я ред. (SCM 2008-010 Rev.1):

As a part of our launch operations, we hold the first stage after ignition and monitor engine prior to release to watch  engine  trends.   If  an  offnominal  condition  exists,  an  autonomous  abort  is conducted.   This  helps  prevent  an  engine  performance  issue  from  causing  a  failure  in flight.

На вебсайте примерно то же, только другими словами:

Another notable point is the SpaceX hold-before-release system — a capability required by commercial airplanes, but not implemented on many launch vehicles. After first stage engine start, the Falcon is held down and not released for flight until all propulsion and vehicle systems are confirmed to be operating normally. An automatic safe shut-down and unloading of propellant occurs if any off nominal conditions are detected.

[LRV_75]

This helps prevent an engine performance issue from causing a failure in flight.

Все верно: "Лучше поиметь проблемы на земле, чем в полете"  :wink:

[Salo]

http://www.spaceflightnow.com/falcon9/002/status.html

1517 GMT (10:17 a.m. EST)
Now SpaceX says 10:50 a.m. EST (1550 GMT) is the earliest they can be ready to support another engine firing. Engineers are reconfiguring the Falcon 9's flight computer right now.

1458 GMT (9:58 a.m. EST)
The launch director just reported a preliminary target time for another static fire attempt at 10:30 a.m. EST (1530 GMT).

1450 GMT (9:50 a.m. EST)
The countdown is now recycled to T-minus 13 minutes and holding as officials assess the situation.

1443 GMT (9:43 a.m. EST)
SpaceX reports the countdown was aborted at T-minus 1.9 seconds and officials are reviewing data in hopes to staging another attempt later today.

1435 GMT (9:35 a.m. EST)
The countdown will be recycled to T-minus 13 minutes to set up for another possible static fire attempt today. The available window extends until 3 p.m. EST (2000 GMT).

1433 GMT (9:33 a.m. EST)
The launch team is safing the rocket while determining the cause and a potential solution for the abort.


1430 GMT (9:30 a.m. EST)
ABORT.

1429 GMT (9:29 a.m. EST)
T-minus 1 minute and counting. Propellant tanks will soon pressurize for ignition.

1428 GMT (9:28 a.m. EST)
T-minus 2 minutes and counting. The launch director has given a "go" for today's static fire.

1427 GMT (9:27 a.m. EST)
T-minus 3 minutes and counting. The launch team is configuring the first stage's TEA-TEB ignitor system and has stopped loading liquid oxygen into the rocket in preparation for ignition.

1425 GMT (9:25 a.m. EST)
T-minus 5 minutes and counting. The launch vehicle is being transitioned to internal power.

1424 GMT (9:24 a.m. EST)
T-minus 6 minutes and counting. The first stage fuel bleed cycle is underway and the navigation system is being aligned for flight.

1422 GMT (9:22 a.m. EST)
T-minus 8 minutes and counting. The pumps of the Falcon's nine Merlin first stage engines are being conditioned for ignition.

1420 GMT (9:20 a.m. EST)
T-minus 10 minutes and counting. The countdown has entered the terminal phase.

1418 GMT (9:18 a.m. EST)
T-minus 12 minutes and counting. The launch director has given approval to enter the terminal countdown at T-minus 10 minutes.

1417 GMT (9:17 a.m. EST)
T-minus 13 minutes and counting. Managers are polling the launch team to verify their readiness to enter the terminal countdown.

1410 GMT (9:10 a.m. EST)
T-minus 20 minutes and counting. The Falcon 9 rocket's nine Merlin first stage engines will be ignited today for 3.5 seconds, enough time to verify systems on the ground and the launch vehicle responsible for the final few seconds of the countdown. The engines will be at full power for approximately 2 seconds.

The engines will produce nearly 1 million pounds of total sea level thrust, more than four times the power of a 747 jumbo jet at full throttle. The engines consume about 3,200 pounds of kerosene and liquid oxygen propellants per second, according to SpaceX.

Yesterday's static fire attempt was automatically aborted at T-minus 1.1 seconds by a high chamber pressure reading in Engine No. 6. SpaceX has not said how engineers resolved the issue.

1405 GMT (9:05 a.m. EST)
The first stage liquid oxygen loading is about to transition to topping mode, ending the fueling process for the two-stage Falcon 9 rocket. Kerosene fuel is already loaded on-board and the second stage liquid oxygen tank was filled a few minutes ago.

1357 GMT (8:57 a.m. EST)
SpaceX reports the first stage liquid oxygen tank is approximately 88 percent full. Helium pressurant has been loaded into the first stage.

1342 GMT (8:42 a.m. EST)
Liquid oxygen loading of the Falcon 9 rocket is nearing completion. Both stages of the rocket are powered by Merlin engines burning refined kerosene fuel and liquid oxygen.

The liquid oxygen is stored in a 125,000-gallon sphere in the southeast quadrant of Complex 40. The rocket's RP-1 kerosene fuel is kept in cylinder-shaped tanks on the west side of the pad.

Engineers plan to load nearly 39,000 gallons of super cold liquid oxygen and almost 25,000 gallons of kerosene fuel into the first stage tanks. About 7,300 gallons of liquid oxygen and around 4,600 gallons of kerosene will go into the second stage.

The propellants flow into the first stage through the launch mount at the base of the rocket. Kerosene and liquid oxygen will be pumped up the strongback umbilical tower to enter the second stage.

1326 GMT (8:26 a.m. EST)
The strongback umbilical tower has retracted about 15 degrees away from the Falcon 9 rocket and fueling preparations are underway at Complex 40. SpaceX reports the static fire test could occur as soon as 9:30 a.m. EST (1430 GMT).

1305 GMT (8:05 a.m. EST)
SpaceX has between 9 a.m. and 3 p.m. EST (1400-2000 GMT) today for this preflight engine firing. The company says it plans another webcast for today's attempt, but it has released no details on when the launch team could actually target ignition.

[Salo]

Очередная попытка в 18:50 ДМВ.

[Salo]

http://www.spaceflightnow.com/falcon9/002/status.html

1559 GMT (10:59 a.m. EST)
SpaceX's audio and video feed has ended for now, so we don't know whether today's static fire met all the planned objectives, including the planned 2 second duration at full thrust.

It is unclear when the company might release further information.

1553 GMT (10:53 a.m. EST)
Officials are reviewing data to determine whether this engine firing met all criteria for today's test.

1550 GMT (10:50 a.m. EST)
IGNITION. The Falcon 9's Merlin first stage engines appeared to ignite with a flash of orange flame at the launch pad. We are standing by for word from SpaceX.

1549 GMT (10:49 a.m. EST)
T-minus 1 minute and counting. Standing by for pressurization of the Falcon 9's propellant tanks for this 3.5-second engine firing.

1548 GMT (10:48 a.m. EST)
T-minus 2 minutes and counting. The Air Force Eastern Range is go for the test, helium loading is terminated and main engine purges have been set for ignition.

1547 GMT (10:47 a.m. EST)
The webcast has resumed at T-minus 3 minutes and everything continues to go well. Liquid oxygen loading has been terminated as planned and the launch director has given final approval for today's test.

1546 GMT (10:46 a.m. EST)
SpaceX's webcast has stopped and we are not receiving live updates of the countdown.

1544 GMT (10:44 a.m. EST)
T-minus 6 minutes and counting. The first stage engines are chilled in for ignition, the first stage fuel bleed sequence has started and the navigation system is configuring for flight.

1541 GMT (10:41 a.m. EST)
T-minus 9 minutes and counting. Chilldown of the first stage's nine Merlin engines is underway.

1540 GMT (10:40 a.m. EST)
T-minus 10 minutes and counting. The terminal countdown has started.

1538 GMT (10:38 a.m. EST)
T-minus 12 minutes and counting. A poll of the launch team concluded with a "go" to initiate the terminal countdown.

1537 GMT (10:37 a.m. EST)
T-minus 13 minutes and counting. The clocks have resumed ticking forward a static fire attempt at 10:50 a.m. EST (1550 GMT).

1524 GMT (10:24 a.m. EST)
The abort at 9:30 a.m. EST was due to low pressure in the gas generator of Engine No. 6, the same engine that triggered yesterday's abort.

[Salo]

Прожиг прошёл, но результат не известен.

[Agent]

http://www.spacex.com/updates.php
Full duration static fire! We'll continue to review data but today's static fire appears to be a success.

[sychbird]

Ну что же, можно пожелать удачного запуска и теста.

[Lev]

Пообщался со своей женой которая ведьма и предсказатель.
Пообщался на тему пуска Фелкона.
Она говорит млять не видит как он сука летит в этом году...

[Bell]

Или летит, но нызенько так...

[LRV_75]

Или летит, но нызенько так...

... что аж брови обжигает  

[Ну-и-ну]

Для удобства транспорта с тремя переносами пуска в день МКС должна летать над экватором.

[Salo]

Видео:
http://link.brightcove.com/services/player/bcpid51731099001?bctid=697840872001

[Liss]

Она говорит млять не видит как он сука летит в этом году...

Если "Фалькошу" перенесут, Китай сделает США по числу пусков.

[sychbird]

Ну тогда штатникам придется засчитать Х-37 за три.  

[Salo]

http://www.nasa.gov/home/hqnews/2010/nov/HQ_M10-168_SpaceX_Launch.html

The launch window extends from 9:03 a.m. (14:03 GMT) to 12:22 p.m. EST (17:22 GMT). If necessary, launch opportunities also are available on Dec. 8 and Dec. 9 with the same window.

[Bell]

Она говорит млять не видит как он сука летит в этом году...

Если "Фалькошу" перенесут, Китай сделает США по числу пусков.

А если не перенесут и запустят, во что бы то ни стало - штаты могут проиграть по числу успешных запусков...

[pkl]

Тенденция однако. Кажется, Черток высказывал мысль что Россию /а, получается, и США/ в области освоения космоса ждёт судьба Испании и Португалии в области мореплавания. Которые начали эру ВГО, а потом отошли на второй план. :?: