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Author Topic: SpaceX (general discussion)  (Read 218800 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.

Online 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/