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Engineering / Re: Interesting stuff about SpaceX Starship (hate the name)
« Last post by Nemesis on June 18, 2024, 05:24:47 pm »
The Starliner computer issue was a power supply fault and they swapped in a spare computer.  The next delay was a helium leak and they not only didn't solve it but the capsule has not made it to the station yet and TWO MORE helium leaks have developed.  They have been stopped apparently by disabling the leaking valves. 

Not inspiring confidence in me.  They couldn't pay be enough to ride on it.

Another delay in return. 

They have  been doing more tests and plan to ignite (TWICE) 7 of the 8 aft thrusters.  The helium leaks are up to FIVE now. 

Not inspiring confidence.  Best of luck to the astronauts if they fly back in this capsule rather than have a Dragon rescue sent up. 

The thrusters being tested failed during docking maneuvers.  All but one of them now seem to be functional.  The last uncrewed flight had failures in the thrusters as well (on the 3rd and last backup by the end of the mission as I recall) so it looks like their fix didn't work very well. 

The return has now been pushed out to the 26th to continue with more testing.   Best wishes for the crew and hopefully NASA won't allow them to return without a high degree of confidence in their survival. 

I just noticed that IFT5 is now being listed for July (so likely August?).   Should be Booster 12 and Starship 30.

Still listing July.  The Starship unit is having the entire heat shield stripped down and replaced. They are adding a ablative layer (under the tiles) and "stronger" (in what way is unclear) tiles.  Some reports can be interpretted that the tiles will be more variable with thinner tiles in low risk areas and thicker ones in high risk.

They also have indicated that the other flaps had issues as well but mostly the forward flaps. 

Still no clear statement as to if they will attempt a catch of the booster.  It occurs to me that part of the reason for removing the old tank farm is that it gives them a clear area to drop the booster on site if the catch fails by hovering just above ground till the fuel runs out minimizing explosion issues.   There is a berm around the tower side at least so there would be some limitation on where the debris could go if it breaks up. Here is hoping that the flight (and catch if attempted) will be flawless. 

Permits for construction related to Starship in Florida indicate TWO towers one of which is labelled as "Catch Tower".  With needing to catch both stages two towers need to be available only one of which needs to be a full launch tower.  So it looks like my repeated statements that they should have a catch only tower are coming true. :)

UPDATE:


The Block 2 Superheavy booster will not have 33 Raptor engines but 35 as well as being taller to contain more fuel.

NEW GLENN:  Still scheduled for the end of September.  The most interesting thing I've come across recently is that Bezos has made a reference to trying to make a much cheaper expendable 2nd stage (previously indicated that their current design CANNOT be profitable without a reusable 2nd stage). 

I wonder if they have found out what I have long suspected SpaceX of discovering when they worked on making the Falcon 9 2nd stage reusable (and gave up) namely that the minimum practical size is much larger, perhaps even Starship sized.  If so then New Glenn is too small by far to make a practical reusable 2nd stage. 

I wonder if they will ever announce anything more about New Armstrong?  Will it be a Starship clone?  The BE-4 engines MIGHT be suitable especially if they were given more refinement to decrease the mass.  They still need their engine factory and to use the same engine for both stages.

Blue Origin has for unclear reasons been allowed to bid on the next round of military launches (covering till 2029) even though they still haven't made even one orbital launch attempt and I am not confident that they will do so this year.  The other two are naturally SpaceX and ULA.

Waiting for the next big event.
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Engineering / Re: Interesting stuff about SpaceX Starship (hate the name)
« Last post by Nemesis on June 15, 2024, 05:06:40 am »
The Starliner computer issue was a power supply fault and they swapped in a spare computer.  The next delay was a helium leak and they not only didn't solve it but the capsule has not made it to the station yet and TWO MORE helium leaks have developed.  They have been stopped apparently by disabling the leaking valves. 

Not inspiring confidence in me.  They couldn't pay be enough to ride on it.

Another delay in return. 

They have  been doing more tests and plan to ignite (TWICE) 7 of the 8 aft thrusters.  The helium leaks are up to FIVE now. 

Not inspiring confidence.  Best of luck to the astronauts if they fly back in this capsule rather than have a Dragon rescue sent up. 
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Engineering / Re: Interesting stuff about SpaceX Starship (hate the name)
« Last post by Nemesis on June 12, 2024, 07:32:39 pm »
I just noticed that IFT5 is now being listed for July (so likely August?).   Should be Booster 12 and Starship 30.
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Engineering / Re: Voyager 1
« Last post by Panzergranate on June 08, 2024, 05:46:56 pm »
If I remember right, it's running on Motorola 8 bit 6800 CPUs, which were the cutting edge of CPU technology, back then. Other options were the Intel 8080 and Signetics 2650, both of which are a tad lame, by comparison. The 2650 is rumoured to use female logic (my first computer (in 1977) used a 2650 CPU).
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Engineering / Re: Interesting stuff about SpaceX Starship (hate the name)
« Last post by Nemesis on June 06, 2024, 09:19:47 am »
IFT 4 has happened.

Super Heavy flew with only 32 engines ignited and while there were some issues it did manage the ocean landing. 

Starship lost some tiles and the one forward flap definitely burned through and lost a significant amount of the flap they kept control all the way down and also achieved a ocean landing after doing the flip back burn.  For much of the reentry they seem to have had only the camera aimed at that flap working and it became largely covered with debris limiting what could be seen (though at times that cleared up) the lens also cracked and according to one report the lens was totally lost eventually but even after that there were images showing the substantial missing material on the flap and the flaps continued CONTROLLED moves. 

How well each of them did on the ocean landing is not clear yet.

I'm sure the naysayers will be going on about how much of a failure this is but I suspect that they will be saying that the 1st time a booster or starship is hanging from the chopsticks after a catch so I won't take that too seriously.

Well done SpaceX.
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Engineering / Re: Interesting stuff about SpaceX Starship (hate the name)
« Last post by Nemesis on June 06, 2024, 04:39:29 am »
The Starliner computer issue was a power supply fault and they swapped in a spare computer.  The next delay was a helium leak and they not only didn't solve it but the capsule has not made it to the station yet and TWO MORE helium leaks have developed.  They have been stopped apparently by disabling the leaking valves. 

Not inspiring confidence in me.  They couldn't pay be enough to ride on it. 
17
Engineering / Re: Voyager 1
« Last post by knightstorm on June 04, 2024, 01:05:46 am »
How far could it go if we could have built it with today's tech?  Could we have made it smaller and potentially faster, or could we have used the reduced weight to give it more plutonium.  Its  estimated that after 2035 there won't be enough power to run any of the instruments.
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Engineering / Re: Interesting stuff about SpaceX Starship (hate the name)
« Last post by knightstorm on June 04, 2024, 12:57:39 am »
The starliner is starting to feel uncomfortably similar to the Apollo 1.
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Engineering / Re: Interesting stuff about SpaceX Starship (hate the name)
« Last post by Nemesis on June 02, 2024, 01:57:08 pm »
Starliner delayed till June 5th (the 1st delay was a ground computer issue, this delay may be a continuation of that, I haven't seen a why yet)

Starship IFT4 delayed till June 6th,  Why?  I don't know. 

Looks like in May SpaceX had at least 15 launches.
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General Starfleet Command Forum / Re: Learning Klingon with Rosetta Stone.
« Last post by Starfox1701 on May 31, 2024, 05:21:07 pm »
well how about that
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