Author Topic: Relativity Space: General Thread  (Read 352962 times)

Offline edzieba

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Re: Relativity Space: General Thread
« Reply #460 on: 11/03/2021 07:45 am »
Only assuming a rocket is a simple plain metal cylinder, with some unremarkable ancillary plumbing bolted to the bottom that's not worth concerning yourself about. Pay no attention to the slosh baffles, anti-vortex plates, surface-tension ullage control devices (e.g. mesh screens, wall channels, etc), pressurisation lines, fill and drain lines, avionics runs, hydraulic and/or pneumatic lines, stiffeners and stringers, aerosurfaces, staging hardware, payload interface hardware, thrust structures, or any of those elaborate fluid dump valves people persist in calling 'engines'.

It's amusing how literally their first piece of flight hardware is being scrutinised as if it were the best their production concept is ever possibly capable of. Reminds me of a certain boilerplate vehicle assembled by water-tower builders whose production could surely never be improved or refined after the first proof-of-concept...

Online xyv

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Re: Relativity Space: General Thread
« Reply #461 on: 11/04/2021 12:04 am »
Hmmmm.  (checks earlier in the thread).  Stargate pictures with a small tank like structure in 2017.  Seems before the water tower guys were on the job, and we are just now printing an interstage that needs to be shipped off site for heat treating.

Offline trimeta

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Re: Relativity Space: General Thread
« Reply #462 on: 11/04/2021 07:28 pm »
Relativity's newsletter has sent out a video and some images of painting their stage 1 tank with "an electrostatic dissipative coating for protection in flight"; Chris Bergin has shared a couple of those images:

https://twitter.com/NASASpaceflight/status/1456313109644300294

While it's not evident from these pictures alone, the video makes it clear the painting was done manually, which I'm sure will elicit comments here about "what's the point of 3D printing if you need to take further manual steps to finish the product?"

Offline ParabolicSnark

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Re: Relativity Space: General Thread
« Reply #463 on: 11/04/2021 08:30 pm »
Here's a link to the newsletter video in question:


Also from the newsletter, an unlisted video of a copper Aeon running a full MDC:
« Last Edit: 11/04/2021 08:39 pm by ParabolicSnark »

Offline edzieba

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Re: Relativity Space: General Thread
« Reply #464 on: 11/05/2021 07:40 am »
While it's not evident from these pictures alone, the video makes it clear the painting was done manually, which I'm sure will elicit comments here about "what's the point of 3D printing if you need to take further manual steps to finish the product?"
Cost/benefit.

3D printing the stage has a high initial cost, but has the benefit of demonstrating a brand new stage construction technique - Relativity's raison d'ętre.

Robotic painting also has a high initial cost, but has zero benefit (vs. a few person-hours, some vinyl, and some sprayguns). It's a COTS system that has been in use in industry for decades.

Re: Relativity Space: General Thread
« Reply #465 on: 11/06/2021 08:14 pm »
While it's not evident from these pictures alone, the video makes it clear the painting was done manually, which I'm sure will elicit comments here about "what's the point of 3D printing if you need to take further manual steps to finish the product?"
Cost/benefit.

3D printing the stage has a high initial cost, but has the benefit of demonstrating a brand new stage construction technique - Relativity's raison d'ętre.

Robotic painting also has a high initial cost, but has zero benefit (vs. a few person-hours, some vinyl, and some sprayguns). It's a COTS system that has been in use in industry for decades.

Not to mention that the paint scheme on this first vehicle is probably not representative of production vehicles. Firefly painted a Phoenix on the side of their first first-stage. The art is just another aspect of the race in this tight market, and excitement for the first launch. I expect all production Terran 1s and Alphas to be much less well painted.
Wait, ∆V? This site will accept the ∆ symbol? How many times have I written out the word "delta" for no reason?

Offline Daniels30

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« Last Edit: 12/05/2021 12:59 pm by Daniels30 »
“There are a thousand things that can happen when you go to light a rocket engine, and only one of them is good.” -
Tom Mueller, SpaceX Co founder and Propulsion CTO.

Offline Navier–Stokes

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Re: Relativity Space: General Thread
« Reply #467 on: 12/09/2021 08:56 pm »



Offline TrevorMonty

Re: Relativity Space: General Thread
« Reply #468 on: 12/09/2021 10:02 pm »



New test stand and Launch pad videos.

Navier its nice to add short comment against links like this.


Sent from my SM-G570Y using Tapatalk


Offline Navier–Stokes

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Re: Relativity Space: General Thread
« Reply #469 on: 12/09/2021 10:58 pm »



New test stand and Launch pad videos.

Navier its nice to add short comment against links like this.


Sent from my SM-G570Y using Tapatalk
Sorry. I always forget that Tapatalk doesn't display embedded links like the full site does.

Offline playadelmars

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Re: Relativity Space: General Thread
« Reply #470 on: 12/22/2021 11:49 pm »
Looks like they’ve completed flight engine qualification of their Methane and Oxygen engine.

https://twitter.com/relativityspace/status/1473766841940123655?s=21

Offline Daniels30

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Re: Relativity Space: General Thread
« Reply #471 on: 01/03/2022 03:09 pm »
RELATIVITY NAMES SCOTT VAN VLIET AS SVP OF SOFTWARE ENGINEERING AND REVEALS PLANS FOR 'NEW FACTORY OPERATING SYSTEM'


https://www.relativityspace.com/press-release/2022/jan03/newsvpatrelativity
“There are a thousand things that can happen when you go to light a rocket engine, and only one of them is good.” -
Tom Mueller, SpaceX Co founder and Propulsion CTO.

Offline trimeta

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Re: Relativity Space: General Thread
« Reply #472 on: 01/06/2022 08:22 pm »
Another edition of Relativity's email newsletter has gone out. They've got a new "sizzle reel" of vehicle development, but it doesn't appear to have any new material, and I'm not sure the policy of sharing the link to that since the featured video is an unlisted YouTube video when sent out to subscribers.

More significantly, they say that "We recently finished internal precision cleaning of S2 and sealed off the tanks, which means no more internal work to be done on this segment of Terran 1." So this is the first time they've had a "complete" second stage tank structure, ready for testing? I suppose they had test articles before, and this is the stage they hope to fly on their first attempt, but it feels kind of late to be sealing off the tanks given that until relatively recently, they claimed they could launch by the end of 2021.


Offline su27k

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Re: Relativity Space: General Thread
« Reply #474 on: 01/26/2022 03:46 am »
A Space Startup Worth $4 Billion Swears Off Fizzling SPAC Craze

Quote from: yahoo.com
(Bloomberg) -- One of the most valuable private space startups after Elon Musk’s SpaceX is the type of company that sponsors of special purpose acquisition companies would love to target for a deal.

But Tim Ellis, co-founder and chief executive officer of Relativity Space Inc., just isn’t interested.

Ellis, 31, didn’t actively pursue SPACs that approached the company, even during the height of their popularity last year among startups in the fast-growing space economy. Relativity, which makes 3D-printed and reusable rockets, has instead raised $1.3 billion through private rounds and was valued at $4.2 billion in June after backing from investors including Fidelity Management & Research Company LLC, Mark Cuban and Jared Leto.

Offline su27k

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Re: Relativity Space: General Thread
« Reply #475 on: 02/02/2022 06:30 am »
Relativity and SpaceX bid on NASA commercial space station competition

Quote from: SpaceNews
The company won technical strengths in NASA’s analysis for “proposed iterative prototyping and testing in hardware development” as well as short but frequent missions that could be handled by a “simple” environmental control system. However, NASA said there was no plan for longer missions as well as a lack of details on the design and a lack of technical maturity for key technologies.

For Relativity’s business plan, NASA found strong technical management and good in-house resources for development of the station, but a lack of a business strategy and “reliance on cash and revenue that is unsubstantiated.” The company also included launch vehicle development in its proposal which was outside the scope of the program. NASA gave Relativity a technical score of white and business plan score of yellow.

Tim Ellis, chief executive of Relativity, told SpaceNews Jan. 31 that the company has a “very early concept” on how the upper stage of its Terran R vehicle could be used as a commercial LEO destination, but declined to go into details. “Just because we did not place in top three selected for this program won’t deter us from continuing conversations with NASA leadership on Relativity’s future vision with a fully reusable Terran R,” he said.

This seems to indicate they have plan for crewed upper stage of Terran R. The proposed conops is similar to some people have envisioned for Starship: Basically just a short stay in LEO then return to Earth.
« Last Edit: 02/02/2022 06:32 am by su27k »

Online harrystranger

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Offline russianhalo117

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Re: Relativity Space: General Thread
« Reply #477 on: 02/13/2022 12:10 am »
Maiden launch teaser video:


Offline PM3

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Re: Relativity Space: General Thread
« Reply #478 on: 02/13/2022 06:09 am »
That video looks like a badly failed launch. Telemetry lost and all systems crashing.
"Never, never be afraid of the truth." -- Jim Bridenstine

Offline edzieba

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Re: Relativity Space: General Thread
« Reply #479 on: 02/13/2022 07:42 pm »
Maiden launch teaser video:


From the background text:
Quote
9 engines completed as of 1/27/2022
And also Mark Cuban's email address.

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