Rocket Launch notification thread

Rocket Launch notification thread

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MartG

Original Poster:

20,673 posts

204 months

Monday 26th April 2021
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NROL-82 due off in a few hours atop a Delta 4 Heavy

https://www.youtube.com/watch?v=gVoo0Q4hNpw

Eric Mc

121,994 posts

265 months

Monday 26th April 2021
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I always like me a Delta 4 Heavy launch - although they can be notoriously difficult to get off the pad at their allotted launch time (or even week/month/year).

Beati Dogu

8,888 posts

139 months

Monday 26th April 2021
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They've been working over the ground support equipment at Vandenberg recently. This after the recent problems they had with the aging and barely-used pad in Florida. So hopefully this launch doesn't have any technical issues & delays like the last one. This is their 13th Delta IV Heavy launch. Filling up the tanks has already started.


bobthemonkey

3,836 posts

216 months

Monday 26th April 2021
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Beati Dogu said:
They've been working over the ground support equipment at Vandenberg recently. This after the recent problems they had with the aging and barely-used pad in Florida. So hopefully this launch doesn't have any technical issues & delays like the last one. This is their 13th Delta IV Heavy launch. Filling up the tanks has already started.

Would have been incredible to have seen a Shuttle fly out of Vandenberg but the risk analysis was shocking.

Eric Mc

121,994 posts

265 months

Monday 26th April 2021
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I doubt that the risk analysis for Cape Canaveral was much better.

Beati Dogu

8,888 posts

139 months

Monday 26th April 2021
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You usually get a nice view of the Californian coast as it heads south.

bobthemonkey

3,836 posts

216 months

Monday 26th April 2021
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Eric Mc said:
I doubt that the risk analysis for Cape Canaveral was much better.
There were some additional pressure and temperature risks at SLC-6 as it essentially carved out of a mountainside.

Eric Mc

121,994 posts

265 months

Monday 26th April 2021
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Cape Canaveral bad
Vandenberg even worse

bobthemonkey

3,836 posts

216 months

Monday 26th April 2021
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Eric Mc said:
Cape Canaveral bad
Vandenberg even worse
Exactamont.

And then add the prospect of launching with a fully fuelled centaur upper stage in the payload bay to make things really exciting. Even the unflappable John Young didn’t seem particularly keen on that one.

Eric Mc

121,994 posts

265 months

Monday 26th April 2021
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Young was very vociferous regarding some of the Cape Canaveral abort trajectories chosen. He thought none of them were survivable.

jingars

1,094 posts

240 months

Tuesday 27th April 2021
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bobthemonkey said:
There were some additional pressure and temperature risks at SLC-6 as it essentially carved out of a mountainside.


Crikey - I see what you mean!

Eric Mc

121,994 posts

265 months

Tuesday 27th April 2021
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I'm not sure what the problem with the surrounding mountains might have been. It might make a return to launch site (RTLS) abort a bit more sporty but, to be honest, an RTLS was very iffy no matter where the launch site was.

Weather is more of a problem at Vendenberg - particularly fog. And that would have affected launch schedules no doubt. Although many rockets launch at Vandenberg through fog, with a Shuttle, an RTLS abort would be out of the question in fog, so fog at the launch site would definitely mean a scrub.

Beati Dogu

8,888 posts

139 months

Tuesday 27th April 2021
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SpaceX also had unique issue with their returning boosters at Vandenberg. They weren't allowed to do so until the local seals had finished having babies as I recall.


They'll be doing Starlink launches out of there once they get their new Pacific coast landing ship set up. They'll be too heavily loaded to fly back to the launch site this time though. It remains to be seen if they'll able to loft the usual 60 satellites on a polar orbit.

bobthemonkey

3,836 posts

216 months

Wednesday 28th April 2021
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Eric Mc said:
I'm not sure what the problem with the surrounding mountains might have been. It might make a return to launch site (RTLS) abort a bit more sporty but, to be honest, an RTLS was very iffy no matter where the launch site was.

Weather is more of a problem at Vendenberg - particularly fog. And that would have affected launch schedules no doubt. Although many rockets launch at Vandenberg through fog, with a Shuttle, an RTLS abort would be out of the question in fog, so fog at the launch site would definitely mean a scrub.
One of the points of concern was the shockwave from launch (even after the water deluge sound suppression system was installed) reflecting off the mountains and damaging either the shuttle stack on the pad infrastructure.

There was also a risk that the more compact infrastructure, coupled with the mountains that trigger the fog you mention, could lead to pockets of unbound hydrogen vent gas accumulating and triggering a fire hazard.

Eric Mc

121,994 posts

265 months

Thursday 29th April 2021
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Never got the chance to test these issues out.

There were three launches last night all in very close timings - SpaceX (of course), China and the ESA.

MartG

Original Poster:

20,673 posts

204 months

Thursday 29th April 2021
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China launched the core module for a new space station

https://www.youtube.com/watch?v=_7O0zG_nrQE

MartG

Original Poster:

20,673 posts

204 months

Saturday 1st May 2021
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...and the core stage will come down...somewhere...soon frown

Tin hat time !

https://spacenews.com/huge-rocket-looks-set-for-un...

Beati Dogu

8,888 posts

139 months

Friday 7th May 2021
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Chinese rocket tracker:

https://youtu.be/UWrGX-ibraU

Viruses, more greenhouse gas emissions than the developed world put together and now the rocket on the head lottery. China really is the gift that keeps on giving.

Eric Mc

121,994 posts

265 months

Friday 7th May 2021
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Nah - as long as you keep a saucepan on your head, you’ll be OK.

MartG

Original Poster:

20,673 posts

204 months

Saturday 15th May 2021
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