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Author Topic: SpaceX (general discussion)  (Read 234485 times)

Offline Flyaway

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Re: SpaceX (general discussion)
« Reply #1500 on: February 11, 2019, 01:19:03 pm »
SpaceX’s Starship engine breaks Russian rocketry record held for two decades

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SpaceX CEO Elon Musk says the company’s Raptor engine, meant to power Starship and Super Heavy, has surpassed a rocketry record held by Russian scientists and engineers for more than two decades.

Known as combustion chamber pressure, Raptor has reportedly surpassed a modern Russian engine known as the RD-180, reaching forces equivalent to one Tesla Model 3 balanced on every square inch of Raptor’s combustion chamber, the hardware directly adjacent to a rocket engine’s bell-shaped nozzle.

Offline sienar

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Re: SpaceX (general discussion)
« Reply #1501 on: February 11, 2019, 08:34:10 pm »
268.9 bar

from elons twitter

Offline Flyaway

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Re: SpaceX (general discussion)
« Reply #1502 on: February 11, 2019, 11:36:43 pm »
SpaceX Launch Certification to Face Review by Pentagon Watchdog

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The Pentagon’s inspector general said it will begin an evaluation of the Air Force’s certification of SpaceX’s primary launch vehicles, the Falcon 9 and Falcon Heavy, years after a legal fight led to a victory for the company founded by Elon Musk.

“Our objective is to determine whether the U.S. Air Force complied with the Launch Services New Entrant Certification Guide when certifying the launch system design for the Evolved Expendable Launch Vehicle-class SpaceX Falcon 9 and Falcon Heavy launch vehicles,” the inspector general said in a memo to Air Force Secretary Heather Wilson sent on Monday.

Offline sferrin

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Re: SpaceX (general discussion)
« Reply #1503 on: February 12, 2019, 05:00:50 am »
I wonder if they'll harass everybody else as well. 
"DARPA Hard"  It ain't what it use to be.

Offline Flyaway

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Re: SpaceX (general discussion)
« Reply #1504 on: February 12, 2019, 08:09:59 am »
Via NSF.


Roscosmos: Lyovochkin replied to Musk (Russian) https://www.roscosmos.ru/25999/
Google translation:
«Pyotr Lyovochkin, chief designer of NPO Energomash, developer and manufacturer of the famous RD-180 family of engines, commented on the PR statement of Elon Musk about the “superiority” of the Raptor engine created by SpaceX:
“The SpaceX company creates the Raptor engine on oxygen and methane components or, as is customary in the Russian classification, the gas-gas scheme. In such schemes, such a pressure level in the combustion chamber is not something extraordinary - in our designs for these schemes we lay down the pressure level in the chamber over 300 atmospheres. And the parameter pressure in the chamber is not the output characteristic of the engine, such as thrust and specific impulse.
However, Mr. Musk, not being a technical specialist, does not take into account that the RD-180 engine for the Atlas launch vehicle uses a completely different fuel circuit - “oxygen-kerosene”, and these are other parameters of the engine operation. It is like comparing a diesel and a gasoline internal combustion engine. And if we take into account the fact that Energomash certified the engine with a 10% reserve, then the pressure in the RD-180 combustion chamber is above 280 atmospheres.
Despite the fact that our companies are competitors, we as engineers welcome the first successes of colleagues from SpaceX in the field of rocket engine building. Indeed, during the development of the Raptor engine, American engineers reached a record pressure level in the chamber. This indicates a fairly high level of development and production processes at SpaceX. ”»

Offline Flyaway

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Re: SpaceX (general discussion)
« Reply #1505 on: February 13, 2019, 08:11:44 am »
SpaceX to submit Moon lander proposal for latest NASA spaceflight competition

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Eric Ralph
ByEric RalphPosted on February 13, 2019
SpaceX reportedly plans to submit its own human-rated Moon lander design for NASA’s latest major request for proposal (RFP), part of the agency’s rough plan to return humans to the Moon no earlier than 2028.

Meant to begin delivering NASA astronauts to the surface of the Moon as early as 2028, the agency hopes to base those lander operations on a thus far unbuilt space station orbiting the Moon with the support of its SLS rocket and Orion spacecraft.

Offline Flyaway

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Re: SpaceX (general discussion)
« Reply #1506 on: February 13, 2019, 04:04:43 pm »
More hardball playing by Space X when it comes to government contracts.

https://spacenews.com/spacex-protests-nasa-launch-contract-award/

Offline Flyaway

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Re: SpaceX (general discussion)
« Reply #1507 on: February 17, 2019, 07:07:45 am »
SpaceX job posts confirm Starship’s Super Heavy booster will be built in Texas

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A duo of SpaceX job postings at the company’s South Texas facilities have confirmed that both Starship and Super Heavy “flight article” vehicles will initially be fabricated and assembled on-site in Boca Chica, also implying that the rocket’s first orbital launch attempts will occur in the same vicinity.

Construction of the first massive Super Heavy booster could begin in Boca Chica within the next several months, presumably progressing in a similar fashion to Starship’s full-scale hopper prototype. According to CEO Elon Musk, Starhopper hop tests and Super Heavy construction could begin – respectively – as early as March and April 2019, perhaps just one or two months from now.

Offline Flyaway

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Re: SpaceX (general discussion)
« Reply #1508 on: February 17, 2019, 12:32:12 pm »
Elon Musk says SpaceX is developing a 'bleeding' heavy-metal rocket ship. Making it work may be 100 times as hard as NASA's most difficult Mars mission, one expert says.

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But whether SpaceX can pull off a launch system of this unprecedented size and design remains to be seen, says Walt Engelund, an aerospace engineer and the director of the Space Technology and Exploration Directorate at NASA Langley.

"Large-scale entry, descent, and landing is something that NASA has been challenged by for decades. We've spent a lot of time and given a lot of thought to how we might do it at Mars," Engelund told Business Insider. "We've landed the metric-ton Curiosity rover — that's the biggest thing we've ever put down on the surface of Mars."

Offline stealthflanker

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Re: SpaceX (general discussion)
« Reply #1509 on: February 18, 2019, 06:36:22 am »
i'm curious on how Space-X thought on space radiation and crew protection.  What kind of shielding it might have, particularly against sun flare

Offline Moose

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Re: SpaceX (general discussion)
« Reply #1510 on: February 18, 2019, 01:56:49 pm »
i'm curious on how Space-X thought on space radiation and crew protection.  What kind of shielding it might have, particularly against sun flare
On Twitter he's been saying their plan is basically to put the fuel tank between the crew and the sun.

Offline NUSNA_Moebius

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Re: SpaceX (general discussion)
« Reply #1511 on: February 18, 2019, 04:11:41 pm »
The center of the space ship is meant to act as a shelter of sorts if interior design since BFR hasn't changed too mcuh.  Depending on how the inside is partitioned out, that could mean the hull + 1 or 2 interior walls.



« Last Edit: February 18, 2019, 04:14:12 pm by NUSNA_Moebius »

Offline Flyaway

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Re: SpaceX (general discussion)
« Reply #1512 on: February 20, 2019, 01:10:19 pm »
Air Force awards $739 million in launch contracts to ULA and SpaceX

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The U.S. Air Force has divided $739 million in launch contracts between United Launch Alliance and SpaceX for six national security missions slated for 2021-2022.

The contracts, awarded under the Evolved Expendable Launch Vehicle (EELV) program, were announced Tuesday evening by Air Force Space and Missile Systems Center.

ULA will receive $441.76 million under a fixed-price contract to launch SBIRS GEO-5, SBIRS GEO-6 and Silent Barker, a classified space situational awareness mission.

Offline fredymac

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Re: SpaceX (general discussion)
« Reply #1513 on: February 21, 2019, 04:43:02 am »
Another fairing catch attempt for tonight's launch.  This will also be the 2nd third flight of a Block V booster.

https://spaceflightnow.com/2019/02/21/falcon-9-nusantara-satu-mission-status-center/

Offline Flyaway

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Re: SpaceX (general discussion)
« Reply #1514 on: February 21, 2019, 09:08:52 am »
SpaceX set for Indonesian satellite launch and Israeli moon mission

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A SpaceX Falcon 9 rocket will launch from Cape Canaveral Thursday, carrying a payload of three very different spacecraft: an Indonesian telecommunications satellite, an experimental spacecraft for the US military and the first commercial mission to attempt a landing on the Moon. Falcon is due to lift off from Space Launch Complex 40 (SLC-40) during a 32-minute window that opens at 20:45 Eastern Time (01:45 UTC on Friday).

The primary payload for Thursday’s launch is Nusantara Satu, a high-throughput communications satellite that will be operated by Indonesia’s PT Pasifik Satelit Nusantara (PSN), however much attention in the build up to launch has been paid to the Israeli Beresheet spacecraft that is piggy-backing on the Falcon 9 launch.

Beresheet will attempt to become the first Israeli spacecraft, and the first privately-operated mission, to land on the Moon. The third satellite aboard Thursday’s launch is S5, a space situational awareness demonstrator for the US Air Force Research Laboratory which will be deployed by Nusantara Satu at a later date.