Interview of Elon Musk by Everyday Astronaut at Boca Chica.
https://youtu.be/t705r8ICkRw

Lots of good info in this video. I don't normally watch Everyday
Astronaut, but this video caught my eye. Enjoy.

Jeff
--
All opinions posted by me on Usenet News are mine, and mine alone.
These posts do not reflect the opinions of my family, friends,
employer, or any organization that I am a member of.

On 2021-08-04 06:54, Jeff Findley wrote:
>
> Interview of Elon Musk by Everyday Astronaut at Boca Chica.
> https://youtu.be/t705r8ICkRw

Many thanks. A rare opportunity to see Elon Musk speak without PR stunts
and provide real information.

So lots of weight shavimg still needed. Wonder if grid fins will go
titanium? After he said that the fins wouldn't fold dow to save
weight, I was expecting their edges to be sharp so they would be
aerodynamic in vertical position on the way up.

So the landing on Moon is still in flux with Musk expressing preference
for using main engines if possible.

BTW, the "catch me if you can" arms for landing of booster against tower
cradle apepar really smal. Not much margin for error.

But a huge difference in philosophy between NASA that designs a
caddillac and then shaves off extras when needed, while Musk starts with
a basic Lada and then adds stuff only where necessary.

Looking forward to the subsequent parts of that interview.

On 2021-08-04 06:54, Jeff Findley wrote:
>
> Interview of Elon Musk by Everyday Astronaut at Boca Chica.
> https://youtu.be/t705r8ICkRw

part 2 has been posted:
https://www.youtube.com/watch?v=SA8ZBJWo73E

Interesting point by Elon:

Tiles are ceramic, the mounting is metal, attached to steel structure
all of which expand/cntact differently as the stack goes from room
tempoerature down to cryo and then very hot during flight and very very
hot during re-entry.

..
The steel and attach will go from room tempoerature down to cryo, and
then get very hot during re-entry, so a lot of contraction and expansion
of metal. And then you have very hot tiles and not so hot metal below.

Falcon 9s Block 5 has evolved enough that SpaceX keeps the early ones
for "terminal" missions where it isn't to be reused after because too
much of a pain to reuse the early ones. So this shows that while
development of Merlins was to have stopped it didn't.

Stage 0 (the launch facility) is the hard part and Musk doesn't want
"iterative" testing on it because rebuilding it takes time. So it may be
a while before they attenpt a landing on it.

Super Heavy isn't landing on its grid fins, it is landing on dedicated
small arms proruding from fuselage that will contact the cradle.

Missing from interview : question on whether welding as completed its
iterative progress and they are now confident tanks win't burst anyme or
whether further improvements are expected.

part 3 of interview has been posted.

https://youtu.be/9Zlnbs-NBUI

In article <K9WQI.16591$NQ1.9266@fx48.iad>,
jfmezei.spamnot@vaxination.ca says...
>
> part 3 of interview has been posted.
>
> https://youtu.be/9Zlnbs-NBUI

I plan on watching this tonight. The first two parts were very
interesting.

Jeff
--
All opinions posted by me on Usenet News are mine, and mine alone.
These posts do not reflect the opinions of my family, friends,
employer, or any organization that I am a member of.

On 2021-08-11 16:18, Jeff Findley wrote:

> I plan on watching this tonight. The first two parts were very
> interesting.

Check out the size of the green/yellow/green crane from the point of
view once they climbed up to the orbital launch support (the night
before the launch ring was lifted on it).

On 2021-08-11 16:18, Jeff Findley wrote:
> In article <K9WQI.16591$NQ1.9266@fx48.iad>,
> jfmezei.spamnot@vaxination.ca says...
>>
>> part 3 of interview has been posted.
>>
>> https://youtu.be/9Zlnbs-NBUI
>
> I plan on watching this tonight. The first two parts were very
> interesting.

The part 3 is much shorter. Musk fans will love it, but Musk speaks of
interplaneraty species more than the launch complex. I get the feeling
that either his attention span had run out of time, or that is is less
focused on that part of the programme so had much less to say.