РН Вулкан - Vulcan Centaur heavy-lift launch vehicle (Планов громадье в ULA)

[Salo]

Kap пишет:

Salo пишет:
С каких пор тяга РД-180 стала 420 тс вместо 390 тс?

Вика пишет 4152 килоньютона. Но даже если по вашему - Маск все равно прибавил тяги больше чем планируют на Вулкане и щеки от этого не надувал.

Т.е. Вы сравниваете вакуумную тягу РД-180 с земной BE-4/AR1? Креативненько.

Так как Маск дует щёки, мало у кого ещё получается.
 Увеличение тяги ведёт к увеличению расхода топлива и РЗТ, а значит и длины бакового отсека. Другая плотность к новому диаметру, а тут ещё и соотношение компонентов другое. Получите новую ракету и распишитесь.

[Kap]

Salo пишет:
Так как Маск дует щёки, мало у кого ещё получается.

Действительно - сделать "Зенит" за 2 года и 400 миллионов больше ни кто так и не сподобился.

Salo пишет:
Увеличение тяги ведёт к увеличению расхода топлива и РЗТ, а значит и длины бакового отсека. Другая плотность к новому диаметру, а тут ещё и соотношение компонентов другое. Получите новую ракету и распишитесь.

Маск эту новую ракету собрал на прибыль с 4х запусков 9.1.0, а Юла два миллиарда просит.

[Александр Ч.]

Kap пишет:
Вика пишет 4152 килоньютона.

Это в вакууме, на уровне земли 3828 кН, согласно http://www.lpre.de/energomash/RD-180/index.htm

[Salo]

Кар пишет:
Но даже если по вашему - Маск все равно прибавил тяги больше чем планируют на Вулкане и щеки от этого не надувал.

При переходе от v1.1 к v1.2 тяга выросла на 15%. У Вулкана в 500 тс/390 тс= 1,28 раза или на 28%.

Маску явно придётся щёки сдувать.

[Kap]

Salo пишет:
При переходе от v1.1 к v1.2 тяга выросла на 15%.

А от 1.0 к 1.1 не считаем чтобы цыфры поменьше были?

Salo пишет:
Маску явно придётся щёки сдувать.

Пусть кое-кто Дримлайнер в этом году запустит для начала. Как 4 года назад обещал.

[Salo]

Kap пишет:
А от 1.0 к 1.1 не считаем чтобы цыфры поменьше были?

Давайте с F1 начнём.

При переходе от v1.0 к v1.1 ракету пришлось проектировать заново.  Что и требовалось доказать.

[Salo]

На что это похоже ..., заправка ракеты:

[Kap]

Salo пишет:
При переходе от v1.0 к v1.1 ракету пришлось проектировать заново.

1) Перепроектировали двигательный отсек, удлинили первую ступень. Можно ссылку что при этом потребовалось силовой набор пересчитывать?
2) Даже если считать переход на октавеб и удлинение перепроектированием заново, Маск на это 2 миллиарда потратил или таки нет?

[Александр Ч.]

[Александр Ч.]

https://twitter.com/SpaceNews_Inc/status/664990522331787264

Air Force awards @ulalaunch a $373M contract for production of one Atlas 5 (421) rocket and one Delta 4 Heavy rocket. Both NRO missions.

[silentpom]

373 за дельту хэви и атлас разом? неплохо

[Kap]

Вот только это за производство. Запуск добавит еще 40 %.

[Apollo13]

Маск, Безос, Бренсон, а теперь и Бруно. Трудно сказать кто кого покусал, но болезнь быстро распространяется и мечтать вслух о захвате Галактики стало модно.

https://twitter.com/george_sowers/status/664891963762692100

[Salo]

https://twitter.com/Gruss_SN/status/665191103835054080

Mike Gruss ‏@Gruss_SN
In Jan, SpaceX was valued at $12B. Wednesday, Fidelity said value has increased 15%, or $1.8B. Reminder: Aerojet reportedly bid $2B for ULA.
  7:34 - 13 нояб. 2015 г.  

[Salo]

https://twitter.com/Gruss_SN/status/665252874675441664

Mike Gruss ‏@Gruss_SN
.@ulalaunch and @torybruno plan to announce on Thursday a new program to launch CubeSats.
  11:40 - 13 нояб. 2015 г.  

[Salo]

http://www.reuters.com/article/2015/11/16/space-launch-ula-idUSL1N13B2PB20151116

Mon Nov 16, 2015 6:00pm EST
Lockheed-Boeing venture says will not bid for US GPS satellite launch       
 By Andrea Shalal and Irene Klotz
 
Nov 16 United Launch Alliance, a joint venture of Lockheed Martin Corp and Boeing Co, on Monday said it would not bid for the next U.S. Air Force global positioning system (GPS) satellite launch, effectively ceding the competition to privately held SpaceX.
ULA, the monopoly provider of such launches since its creation in 2006, said it was unable to submit a compliant bid because of the way the competition was structured, and because it lacked Russian-built RD-180 engines for its Atlas 5 rocket.
The Pentagon last month declined to issue a waiver from a U.S. law that last year banned use of the Russian engines for military and spy satellite launches. ULA had said it needed the waiver to compete against SpaceX, officially known as Space Exploration Technologies Corp, the only other company certified to bid for the work.
Bids were due Monday and the Air Force expects to announce a contract winner in March.
ULA Chief Executive Tory Bruno told Reuters that ULA also lacked the accounting systems to comply with the rules of the competition, which requires bidders to certify that funds from other government contracts will not benefit the GPS 3 mission.
He also said the competition's 'Lowest Price Technically Acceptable' structure meant officials could not differentiate between bids on the basis of reliability, schedule certainty, technical capability and past performance, effectively removing ULA's greatest strengths from consideration.
Prompted by Russia's annexation of Crimea last year, U.S. lawmakers banned the use of Russian RD-180 rocket engines for military and spy satellite launches after 2019.
Bruno told Reuters that ULA was disappointed that it could not compete now, but was studying potential sole-source awards and other options for future launch contracts. Bruno told reporters on Oct. 2 that ULA did not have enough engines to bid for the GPS 3 launch, the first of nine military missions identified for possible competition.
"We look forward to working with the Air Force to address the obstacles to ULA's participation in future launch competitions to enable a full and fair competition," he said in a written statement.
In an interview with Reuters, Bruno also signaled that ULA would also continue to press Congress for changes in the Russian rocket engine ban, and said he had not decided whether to mount a legal challenge to a potential contract award.
ULA no longer had a two-year supply of engines in its inventory, Bruno said, noting that it skipped a regular order for the engines in January while awaiting a resolution on how many engines it could use for military launches.
"We've been burning down through the inventory at a pretty high rate," Bruno said.
The congressional ban does not affect RD-180 engines used for NASA and commercial missions, but whenever ULA taps its current RD-180 inventory for non-military flights, it cannot order a replacement for later use on a military missions.
The ban still affects 9 of 29 engines that ULA had ordered from Russia, but not paid for, before Russia annexed Crimea. Five engines that were approved for ULA's use by Congress last year had already been assigned to other missions, and were not available for use in a bid for the new GPS launch, Bruno said.
Congress is poised to approve the use of four more RD-180 engines in a compromise version of the fiscal 2016 defense authorization bill, but the bill has not yet been enacted into law, and bids were due on Monday.
SpaceX founder and CEO Elon Musk last month said ULA's threat to skip the Air Force competition was "nothing less than deceptive brinkmanship" aimed at subverting the will of Congress.
Bruno said ULA's board would vote in coming days on an order of additional RD-180 engines valued at "several hundred million dollars" for commercial and civil use. (Reporting by Andrea Shalal and Irene Klotz; Editing by Bill Rigby)

[Александр Ч.]

Еще на ту же тему:

Mike Gruss ‏@Gruss_SN  8 ч.8 часов назад

Price point to watch: In court docs last year SpaceX told the Air Force it could launch GPS sats for ~$80M.

Mike Gruss ‏@Gruss_SN  8 ч.8 часов назад

ULA did not bid for Air Force's GPS 3 launch, citing lack of engines and compliant accounting system. SpaceX had been expected to bid.

И статья от Майка (кое какие цифры): 
ULA Declines To Bid on GPS 3 Launch Contract Long Sought by SpaceX

by Mike Gruss — November 16, 2015
WASHINGTON — SpaceX is likely to win — by default — a U.S. Air Force contract to launch a next-generation GPS satellite after United Launch Alliance announced Nov. 16 that it declined to bid.
ULA, which for the past decade has launched nearly every U.S. national security satellite, said Nov. 16 it did not submit a bid to launch a GPS 3 satellite for the Air Force in 2018 in part because it does not expect to have an Atlas 5 rocket available for the mission. ULA has been pushing for relief from legislation Congress passed roughly a year ago requiring the Air Force to phase out its use of the Russian-made RD-180 engine that powers ULA's workhorse Atlas 5 rocket.

While ULA warned in early October that RD-180 availability could prevent it from bidding on the GPS 3 launch, the company said Nov. 16 it does not have the right accounting system in place to submit what the Air Force would deem a compliant bid.

"ULA wants nothing more than to compete, but unfortunately we are unable to submit a compliant bid for GPS III-X launch services," the company said in a statement sent to reporters. "The [request for proposals] requires ULA to certify that funds from other government contracts will not benefit the GPS III launch mission. ULA does not have the accounting systems in place to make that certification, and therefore cannot submit a compliant proposal."

ULA — which emphasizes the reliability of its Atlas and Delta rockets as an advantage over SpaceX's lower advertised prices  —  also said the Air Force's GPS 3 launch solicitation "allows for no ability to differentiate between competitors on the basis of critical factors such as reliability, schedule certainty, technical capability and past performance."

The Air Force called for proposals for the GPS 3 launch Sept. 30. Bids were due Nov. 16 with an award expected in March.

ULA's decision not to bid is a setback for Defense Department efforts to reintroduce competition into a national security launch market that's been a de facto monopoly since Boeing and Lockheed Martin merged their launch businesses in 2006 at the government's request.

The GPS 3 mission is the first of nine medium-class launches the Air Force intends to put out for bid by the end of 2017. Of the nine, six are for GPS 3 satellites.

SpaceX, which is eager to break into the lucrative national security launch market, submitted an unsolicited bid in 2012 to launch the GPS 3 satellites for $79.9 million per launch. The Air Force rejected the offer, but initiated a process for certifying the Hawthorne, California-based company's Falcon 9 rocket to carry military and intelligence payloads to orbit.

ULA, meanwhile, has been working to lower its launch costs. Last month, NASA awarded ULA a $132.4 million contract to launch the Tracking and Data Relay Satellite-M spacecraft aboard an Atlas 5 rocket in October 2017.  NASA paid ULA $187 million to launch the Mars Maven orbiter on an Atlas 5 in 2013.

[silentpom]

sic transit gloria mundi

[Salo]

Peter B. de Selding ‏@pbdes   18 часов назад  
ULA cubesats-on-Atlas-in-2017 announcement says it's free for university/STEM sats. Pricing for non-university sats not addressed.

  Peter B. de Selding ‏@pbdes   18 часов назад  
A question ULA's Bruno doesnt address: What's USAF think of allowing cubesats to ride aboard Atlas launches of expensive USAF sats?
 
  Peter B. de Selding ‏@pbdes   18 часов назад  
ULA CEO Bruno: The coming Atlas cubesat platform will offer free rides to student STEM spacecraft.
 
  Peter B. de Selding ‏@pbdes   18 часов назад  
ULA CEO: Starting mid-2017, Atlas rockets to carry platform for up to 24 cubesats, offering > 2X current global cubesat launch availability.

[Salo]

https://twitter.com/ulalaunch/status/667388104458792960

ULA Подлинная учетная запись ‏@ulalaunch  
ULA Reveals Transformational CubeSat Program http://bit.ly/1QwwbTr  #ULACubeSats #STEM  
 
  9:04 - 19 нояб. 2015 г.