Author Topic: RS Terran 1 first flight #GoodLuckHaveFun : CCSFS SLC-16 : NET October 2022  (Read 16518 times)

Online edzieba

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advantages China as they don’t care much about a deorbit burn to get the upper stage to deorbit in a safe spot (the entiee reason why starship, which has plenty of performance, might do less than a full orbit).
No comparison. Unlike an upper stage, Starship is very specifically designed not to be fully demisable (and ideally not be demisable at all). Plenty of US launchers also omit a deorbit burn (either due to full deniability without one, lack of prop margin necessitating inerting in a stable orbit, or just because it's not legal requirement).
Presence or absence of a deorbit burn is not going to delay a test flight.

I think the point being made was that Starship's test flight is only almost orbital, since it's planned to reenter before completing a full orbit around the Earth. So even if Starship launches first, you could argue it wasn't the first methalox vehicle to reach orbit. However, the reason for this not-quite-orbital trajectory is that they want to test their reentry system, not because they lack the capability to reach orbit: thus, the "advantage" goes to the companies not bothering with such a test, since they can attempt orbit on their very first launch.
You don't need to complete an orbit to achieve orbital velocity (e.g. Gagarin).
As long as your perigee is far enough into the atmosphere (and your path dwells there for long enough) to ensure deorbit then you also don't even need a discrete entry burn: whilst the goal for most launches is to end your first burn at the perigee of your transfer orbit (because that's the most fuel efficient option) there's nothing to stop you inserting into any portion of the orbit you wish: apogee, perigee or anywhere in between, at the cost of inefficient propellant utilisation. There's nothing to actually stop you performing radial-in or radial-out burns, or accommodating those vectors during your initial burn. The JWST launch shows this trajectory shaping quite dramatically, for example.

Offline Steven Pietrobon

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Not as engine rich this time.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline FutureSpaceTourist

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https://twitter.com/nextspaceflight/status/1556356515275059202

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Tim says that Relativity is working towards a full mission duration firing of Terran 1 on the pad ahead of the first launch.

Once successful stages 1 & 2 will then be integrated. S2 has already done a full duration mission test at NASA Stennis. They will be a brief test with both stages together.

Offline FutureSpaceTourist

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https://twitter.com/thetimellis/status/1561801564741808129

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FULL DURATION 20 second stage test complete! Reviewing data and if all looks good, on to full flight duration test before LAUNCH. We are the first company to ever do this on launch mount at Cape Canaveral, and on track to be the first oxygen/methane rocket launched to orbit 👾🇺🇸

https://twitter.com/thetimellis/status/1561802191932821504

Offline FutureSpaceTourist

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Offline FutureSpaceTourist

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https://twitter.com/thesheetztweetz/status/1564646888049106946

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Thanks for the tour around LC-16 and launch control, Relativity!

Great to see Terran 1 on the pad and check out what you’ve built here at the Cape – look forward to watching #GLHF take off.

Offline FutureSpaceTourist

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https://twitter.com/relativityspace/status/1564729885838524423

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Big fans of the KISS principle over here. SPACE ↑ #GLHF

Offline Conexion Espacial

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« Last Edit: 09/14/2022 10:27 pm by Conexion Espacial »
I publish information in Spanish about space and rockets.
https://twitter.com/conexionspacial

Offline FutureSpaceTourist

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twitter.com/thetimellis/status/1569799536012595200

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Prepping for next stage MDC attempt in few days, weather permitting.

https://twitter.com/thetimellis/status/1569808909803700229

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MDC = Mission Duty Cycle test which is as close to full flight duration as can get on ground. Finally step before locking launch date. Also working FAA.

https://twitter.com/thetimellis/status/1570522443068100609

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Just short static fire at that point. Stage 2 testing already complete entirely.

Offline FutureSpaceTourist

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https://twitter.com/thetimellis/status/1571872977393963008

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Weather been terrible last few days for MDC but team continuing to prep when able and working toward this week for test

Offline FutureSpaceTourist

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twitter.com/thetimellis/status/1572337580510789633

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Completed 57 second stage test today as we work toward full duration test - our longest yet! Stunning 🤩, super proud of work team is doing, a big step forward!

https://twitter.com/thetimellis/status/1572337699486572545
« Last Edit: 09/20/2022 09:32 pm by FutureSpaceTourist »

Offline FutureSpaceTourist

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https://twitter.com/thetimellis/status/1573044575928811520

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57 second stage test @relativityspace, hardware and data looking really good to proceed to next stage test targeting full duration tomorrow! 🔥🔥🔥(gotta make that blue fire emoji @Apple)

Offline FutureSpaceTourist

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https://twitter.com/relativityspace/status/1573483902173257728

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Trying to give the people what they want!🔥🔥🔥Got ya an encore performance this Friday afternoon. Worked up to 82 seconds on today's stage test. Massively proud of our team and their hustle in the face of incoming weather 🌧️🍥🚀#GLHF

Offline ParabolicSnark

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About 1:05 in there's several green streaks that appear in the plume. Looks like they may have just lost a chamber and may need to do a swap. At least it didn't let go.

Offline trimeta

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About 1:05 in there's several green streaks that appear in the plume. Looks like they may have just lost a chamber and may need to do a swap. At least it didn't let go.
This is the second time they've had a static fire which was (according to publicly-available information) supposed to be full-duration, but ended up being substantially below full duration. I guess issues have arisen on each attempt...better to find them now than when launching, I suppose.

Offline FutureSpaceTourist

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https://twitter.com/thetimellis/status/1573625299182444545

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Rolling back to hangar to keep vehicle safe during impending hurricane in Florida. Early data and hardware looking solid from last week’s extensive stage one testing, super happy with the results 😄

Offline Steven Pietrobon

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The green flame of death.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline FutureSpaceTourist

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https://twitter.com/thetimellis/status/1573484611434323973

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🤘got solid autogenous press data which was primary objective. Looking incredible and feeling close to flight 🚀🚀🚀

twitter.com/alexphysics13/status/1573632024845422593

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Is this the final rollback? So the next time it goes out it will be on the TE with second stage and fairing on top? Or do you have any more testing to do with the booster?

https://twitter.com/thetimellis/status/1573634794931494912

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Will determine as we dig deeper into data but it’s possible it’s final

Online edzieba

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The green flame of death.
Only mostly dead (i.e. still slightly alive).
The copper burnt away, and the engine continued firing afterwards to what appeared to be a nominal shutdown with the others, so whatever component got melty was not something that would cause a RUD, or even trigger an emergency shutdown.

Offline FutureSpaceTourist

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https://twitter.com/relativityspace/status/1574843587220545536

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Terran 1 hardware tucked away safe and sound ahead of incoming Hurricane Ian.✅

📸 @TrevorMahlmann

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