SpaceX Starship

Surely you mean "morale", right?

Jedi

 

They had a series of envelope pushing tests on the booster:
1. re-fly (including 29 of 33 engines)
2. new hot staging ring to force the flip in a particular direction
3. different (much more aggressive trajectory - probably what caused the failure due to overheating/overstressing the engines) as a potential technique in saving fuel.
4. Landing control with one of the three center engines out and replaced with a mid-ring engine.

They pushed it to failure intentionally. They got answers on the first three of the four questions (based on the timing of when things went boom).

The Starship itself is a 'version 2', a heavily redesigned thing. This is the third flight of the redesign (the first two - flights 7 & 8, put on a show over the Caribbean and Florida). The 'version 1' had a similar development arc with control failure on it's third flight. Flights 4 and 5 worked well so they moved to 'version 2'.

I don't know the internal design of 'version 2' but whatever they changed is creating a headache with things cracking and breaking (I suspect the leak caused excessive pressure in the cargo bay, preventing the door from opening. The leaks also caused control problems which resulted the the scrubbing of the engine re-light attempt and the burn up on re-entry.

As long as they can use the knowledge gained to correct, they may be ready to catch the whole thing (upper and lower stages) by the time the second tower is ready. Probably in two or three more flights.

Regards,

Art S.

 

"the internal design of 'version 2' but whatever they changed is creating a headache"
*****
IIRC, major redesign of propellant tanks with 25% increase in capacity and also major redesign of fuel delivery plumbing, probably where leak problems are occurring. Other significant changes in order the double the payload to LEO from 50 to 100 tons. Any other developer would have been happy to continue to optimize Block 1 but Space X flys to learn and not afraid of the "optics" of failure....Perhaps one of the reasons that Falcon 9 has had 450+ successful landings from orbital launches and everyone else 0.

 

Totally agree but when viewed casually, there's a question of why things keep going boom. The answer is: because this is the development phase and they are continually pushing the envelope. They are blowing things up now so that they know what kind of margins they have when they go into series production and commercial use.

I have a feeling the final Starship system will be both robust and diverse. Exceeding Falcon 9's reliability and variability (Falcon 9: satellite launcher, crew capsule, space station re-supply cargo capsule, etc.).

Regards,

Art S.

 

It takes a special person to push ahead with high risk testing when the establishment want to ruin you. The ABC story from a few days ago is typical..to the effect: “Space X “Mars Rocket” scheduled for 9th launch despite 8 previous failures!”

 

Elon's Space X status report:

Tweet

— Twitter API (@user) date

 

.

 

Review of Flight 9 and state of Starship program and where it is going. >>> Very informative ..... (aka long and slightly boring )



.

 

Ship 36 exploded an hour ago towards the end of liquid oxygen fueling for a static fire test tomorrow.
Hopefully nobody hurt.
Test facility has to be completely destroyed.
V2 is turning out to be a giant turd.
Image Unavailable, Please Login

https://www.youtube.com/live/WKwWclAKYa0

 

KABOOOM!!! ........... MAJOR SETBACK

https://www.facebook.com/reel/1195457302333796

Tweet

— Twitter API (@user) date

.

 

with audio ...... Stay Angry!



.

 

slo-mo, frame-by-frame .......



.

 

Whoa!

Well, they definitely are finding the design limits with block 2... Musk was right about the schedule - the nosecone may have made it to orbit without the booster... :^)

I think they got aggressive with the design philosophy after so much success and overkill robustness with the booster and block 1 (remember the first launch doing doughnuts in the sky and refusing to blow after the failed separation) that they really pushed it and left too little margin all around. Now they are playing whack-a-mole with cracks, leaks, etc. My concern is that the team gets discouraged.

IMO, someone near Musk needs to convince him pull back slightly on the spec and payload capability (assuming, he is fixated) as the system needs a safety margin somewhere between Block 1 and Block 2.

That said, pretty cool show!

Regards,

Art S.

 

Good review. Slow motion footage around the 4 minute mark of this video shows the initial rupture of the outer structure:



I like that he used the quote: "Anyone can build a bridge that stands, but it takes an engineer to build a bridge that barely stands"

 

Image Unavailable, Please Login

.
Composite Overwrapped Pressure Vessel (COPV)
https://en.wikipedia.org/wiki/Composite_overwrapped_pressure_vessel

Shades of the Titan submersible. Composite tanks are unreliable when pushed to extremes and will get people killed. IMO

.

 

Saw that last night... a big boom!

hopefully not too much damage to the infrastructure at that site.

 

The crane in the background didn't seem to get knocked over, hopefully it's a sign that he facility will be on line soon.

 

5(?) weeks ago >>> Accusations of CPOV bottles being mishandled by untrained workers.

Tweet

— Twitter API (@user) date

.

 

Big, BIG, difference between a tank in tension (internal pressure) vs compression (external pressure)

Composite lng tanks are used extensively on vehicles (eg trucks).

 

expanded from above post

Image Unavailable, Please Login

.

 

no kidding

I wrote 'shades of' . Composites, in general, can fail unexpectedly
.

 

Image Unavailable, Please Login

 

Image Unavailable, Please Login

 

Is anybody invoicing the ketamine baboon for cleanup of the massive pollution his repeated explosive failures are causing?