Author Topic: Relativity Space - Terran R  (Read 126574 times)

Offline Hug

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Re: Relativity Space - Terran R
« Reply #500 on: 12/03/2023 11:20 pm »
Does anyone have any idea why Relativity came up with this particular design?

They're probably just pulling an Aeon 1 Block 1 and having a really underbuilt nozzle while figuring out the rest.

https://twitter.com/thetimellis/status/1730746873227710677
Quote
Same one we tested but thatís also good because it survived to see another day ;)

Production cadence is ramping however, youíre right

So they brought the powerpack back to the shop and fully kitted it out with the nozzle. Also in the background on the right you can see the second engine build.

Attachment 1 source:
https://media.discordapp.net/attachments/922737781237768202/1181022249290039396/1695762478963.jpg

Attachment 2 source:
https://media.licdn.com/dms/image/D5622AQH0RT3ByjqHLQ/feedshare-shrink_1280/0/1696019318550?e=1704326400&v=beta&t=cYHjgnys3dpeKjAabx3bFUPTQMB7COJc9hV0xf6s7gk

It would be a really small nozzle given what Tim has said about it previously

https://twitter.com/thetimellis/status/1626733136402092032
Quote
(Also regen nozzle even for boost engine is way larger than this - itís quite a high chamber pressure gg cycle engine)

zubenelgenubi: Attach files. Do not embed them.
« Last Edit: 12/07/2023 06:41 pm by zubenelgenubi »

Online YetAnotherLurker

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Re: Relativity Space - Terran R
« Reply #501 on: 12/05/2023 06:10 am »
First look: Aeon R on the test stand. 🔥

I'm definitely not an expert in rocket engines, but this nozzle extension looks bizarre to me. It's way too short and wide for an average sea-level engine and basically resembles the shortened version of SpaceX's MVac.

Does anyone have any idea why Relativity came up with this particular design?

In many of cases, vacuum engines aren't capable of stable combustion at sea level, requiring a shortened or different nozzle for testing. The tweets linked above seem to indicate this is a "placeholder nozzle" and not the final design, indicating that either the final nozzle isn't ready or isn't capable of sea level test firing.

Offline Robotbeat

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Re: Relativity Space - Terran R
« Reply #502 on: 12/05/2023 03:23 pm »
I think SpaceX has also reinforced their vacuum nozzles for sea level testing. Thin vacuum nozzles can destroy themselves when test fired under highly over expanded conditions if not externally reinforced. So thatís another option besides using a shorter nozzle.
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Re: Relativity Space - Terran R
« Reply #503 on: 12/05/2023 05:54 pm »
https://twitter.com/relativityspace/status/1732110895562768729

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Aeon R: September - Powerpack. ➡️ November - Full Engine Upgrade. #TerranR

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Re: Relativity Space - Terran R
« Reply #504 on: 12/08/2023 07:06 pm »
https://twitter.com/relativityspace/status/1733216083795227116

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*Not AI generated.🌄 In the distance, at 200 ft tall, the A2 test stand is undergoing renovation to support Terran R first-stage testing.

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Re: Relativity Space - Terran R
« Reply #505 on: 12/14/2023 05:59 pm »
Quote
Fired up our first Aeon R engine hot fires this week. Sound on.

🎯 10 seconds of fire.
✔️ Validated component harmony during start up, at target power (70%), and shutdown.
🏅️ Strong start to test campaign. Initial hardware inspections look healthy.
🔜 Longer duration. More power. More blue fire.
📍@NASAStennis R Complex, new dual-bay vertical engine test stand

https://twitter.com/relativityspace/status/1735365227452174459

Quote
13 of these 258,000 Ibf 3D-printed engines will power Terran Rís first stage.

🚀: https://bit.ly/aeonr

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Re: Relativity Space - Terran R
« Reply #506 on: 12/14/2023 06:00 pm »
YouTube version:


Online HVM

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Re: Relativity Space - Terran R
« Reply #507 on: 12/14/2023 06:48 pm »
What is up with the UV-lights at the start-up and shutdown?
(R in Aeon R is for rave)
« Last Edit: 12/14/2023 06:50 pm by HVM »

Online catdlr

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Re: Relativity Space - Terran R
« Reply #508 on: 12/14/2023 11:06 pm »
What is up with the UV-lights at the start-up and shutdown?
(R in Aeon R is for rave)

I'm going to say it's for leak detection.  I've seen an HVAC repairman using this to detect leaks from special dyes placed into the refrigerant and can only be seen with UV lighting and two pictures before and after to compare. Could be that only guessing that this same technique is being applied here as well.
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Offline Robotbeat

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Re: Relativity Space - Terran R
« Reply #509 on: 12/14/2023 11:17 pm »
What is up with the UV-lights at the start-up and shutdown?
(R in Aeon R is for rave)
I strongly suspect it is: Thermal-sensitive paint, which needs UV light for activation.
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Offline TrevorMonty

Re: Relativity Space - Terran R
« Reply #510 on: 12/15/2023 12:27 am »


I think Miranda and Aaron-R are much, much closer in development than Archimedes is.
RL still targetting first test firing around end of  2023. NB there is huge difference between first test firing attempt and successful test firing. Both Archimedes and Aeon R could do RUD  on first attempt. Miranda has demonstrated a succesful startup and initial burn at reduced thrust which is big milestone. Still lot of tests to go before a full duration at max thrust test.


Looks like Aeon R is off to good start with first test being a success. 
Archimedes your up next competition has set a high bar.

Offline Robotbeat

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Re: Relativity Space - Terran R
« Reply #511 on: 12/15/2023 12:52 am »
This is only half a month behind Miranda doing a similar test. I think Mirandaís was lower percent thrust, too, and they didnít show a video, so by turbulentsphere (or is it wikkit)Ďs metric (companies showing video of a test fire always show the longest test fire time that they can), it must have been a very short test fire, probably shorter than Aeon-Rís.

Iíd say Firefly & Relativity are neck and neck now.

258klbf thrust for Aeon-R and 230klbf for Miranda. Both engines were completed very quickly. 13 Aeon-R vs 7 MirandaÖ overall first stage thrust ratio (Relativity:Firefly) is over 2:1, with probably a slight Isp advantage for Terran-R (but a density and thus dry mass advantage for MLV).

Terran-R-Expendable has over double the LEO performance as MLV, and slightly greater than Vulcan to LEO
« Last Edit: 12/15/2023 12:56 am by Robotbeat »
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Re: Relativity Space - Terran R
« Reply #512 on: 12/15/2023 05:13 am »
https://twitter.com/relativityspace/status/1735439928685945331

Quote
Aeon R vs Aeon 1 context: The flight config of Aeon R will have 11x the thrust, a 3x larger exit diameter and be 1.7x taller than our Aeon 1 engine.

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Re: Relativity Space - Terran R
« Reply #513 on: 12/15/2023 10:51 am »
What is up with the UV-lights at the start-up and shutdown?
(R in Aeon R is for rave)

I'm going to say it's for leak detection.  I've seen an HVAC repairman using this to detect leaks from special dyes placed into the refrigerant and can only be seen with UV lighting and two pictures before and after to compare. Could be that only guessing that this same technique is being applied here as well.
From RelativitySpace's Official UT Channel:

"@RelativitySpace
hello! We use it as a marker to sync the video feeds with our other data sources."

So just blue leds, working as a Clapperboard...
« Last Edit: 12/15/2023 10:58 am by HVM »

Offline Robotbeat

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Re: Relativity Space - Terran R
« Reply #514 on: 12/15/2023 12:20 pm »
What is up with the UV-lights at the start-up and shutdown?
(R in Aeon R is for rave)

I'm going to say it's for leak detection.  I've seen an HVAC repairman using this to detect leaks from special dyes placed into the refrigerant and can only be seen with UV lighting and two pictures before and after to compare. Could be that only guessing that this same technique is being applied here as well.
From RelativitySpace's Official UT Channel:

"@RelativitySpace
hello! We use it as a marker to sync the video feeds with our other data sources."

So just blue leds, working as a Clapperboard...
Huh, thatís unexpected but makes sense!
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Offline edzieba

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Re: Relativity Space - Terran R
« Reply #515 on: 12/15/2023 12:37 pm »
YouTube version:


Is that a dump-cooled nozzle?

Offline Robotbeat

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Re: Relativity Space - Terran R
« Reply #516 on: 12/15/2023 12:57 pm »
Iím pretty sure no (would have poor performance with anything but hydrogen). Does look like plenty of film cooling tho?


Actually, on second thought, I suppose your suggestion is *possible*Ö
https://ntrs.nasa.gov/api/citations/19660022898/downloads/19660022898.pdf
« Last Edit: 12/15/2023 12:59 pm by Robotbeat »
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Offline edzieba

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Re: Relativity Space - Terran R
« Reply #517 on: 12/15/2023 01:22 pm »
I wouldn't expect the engine to fly that way, but I could see it being a simple option for ground testing.

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Re: Relativity Space - Terran R
« Reply #518 on: 12/16/2023 05:32 pm »
twitter.com/relativityspace/status/1736091520024096995

Quote
📣 Aeon R Mission Duty Cycle complete!!! Last night @NASAStennis  #AeonR burned in a flight-like configuration for 143 seconds at 70% power Ė marking a record-breaking pace for engine development and a very speedy 48-hour turnaround from Aeon R's first ever hot fires to successfully completing a full flight duration burn.

< 2 days Aeon Rs first hot fires ➡️ Full MDC
< 3 months ➡️ Powerpack install, testing, conversion to full engine, hot fires
< 1 year empty land ➡️ dual-bay vertical engine test stand
≤ 2 years ➡️ 1,000+ Aeon R component level tests

Edit to add:

https://twitter.com/relativityspace/status/1736093928561193236

Quote
🔑 This key engine development milestone validates the design, including our novel, additively manufactured Thrust Chamber Assembly (TCA), providing us with data to anchor our performance models.

🚀 bit.ly/aeonr
« Last Edit: 12/16/2023 05:52 pm by FutureSpaceTourist »

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Re: Relativity Space - Terran R
« Reply #519 on: 12/16/2023 05:36 pm »

 

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