Author Topic: SpaceX Falcon 9 - Iridium NEXT Flight 1 DISCUSSION (Jan. 14 2017)  (Read 346002 times)

Offline Kaputnik

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obviously have been working on de-fogging the decent camera, clear picture all the way down.

Well this stage likely had a less rigorous decent regime than the GTO birds.

I believe all previous decent camera videos covered all types of decent regimes.

It was pretty decent of them to show the entire descent.
"I don't care what anything was DESIGNED to do, I care about what it CAN do"- Gene Kranz

Offline Alastor

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does anyone have any clue about what kind of debris can be seen at T+5.35 (the landing sequence) on the left side of the screen? it looks like a solid piece flying away from the stage, it stays there for quite sometime going of its own downground and rotating on itself...

fairing?

Good catch ! It does look like a piece of fairing to me. It would make sense to see it there, too, I think.
By the way, did anyone catch something that would look like RCS jets on the fairings ? I wonder where they are with the fairing recovery project !
« Last Edit: 01/14/2017 06:30 pm by Alastor »

Offline ppb

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obviously have been working on de-fogging the decent camera, clear picture all the way down.

Well this stage likely had a less rigorous decent regime than the GTO birds.

I believe all previous decent camera videos covered all types of decent regimes.

It was pretty decent of them to show the entire descent.

I guess that makes you the docent of proper descent decency.
Quam celerrime ad astra

Offline matthewkantar

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I think that object is a lot closer, it seems to be flipping around a lot faster than it would if it was the fairing.

Matthew

Offline dawei

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When is the de-orbit burn?

Offline Ben the Space Brit

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I think that object is a lot closer, it seems to be flipping around a lot faster than it would if it was the fairing.

Is it common for the upper stage to shed bits of thermal blankets or bits of insulation from the engine piping during flight?
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Offline Lar

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Booster is tagged '29'.
I saw that and the whole room (I'm at a LEGO meeting, and I talked them all into watching) was impressed because I had predicted what number it was but said it probably wouldn't be actually on the booster.
"I think it would be great to be born on Earth and to die on Mars. Just hopefully not at the point of impact." -Elon Musk
"We're a little bit like the dog who caught the bus" - Musk after CRS-8 S1 successfully landed on ASDS OCISLY

Offline DatUser14

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Grey 29 under the legs, I thought F9-29 was AMOS-6?
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Offline xyv

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Perfect day for a launch.  Was out at Ocean Ave and got a few good pictures.

Offline old_sellsword

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Grey 29 under the legs, I thought F9-29 was AMOS-6?

You're right, Amos-6 was F9-029. However the 29 on this booster is a serial number for the first stage, 1029. This was flight F9-030 using first stage 1029-1.

Use this page as a guide.
« Last Edit: 01/14/2017 06:51 pm by old_sellsword »

Offline ppb

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Have the satellites been heard from yet?  Or is that another thread?
Quam celerrime ad astra

Offline The_Ronin

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Have the satellites been heard from yet?  Or is that another thread?

SpaceX reported all 10 satellites are reporting in.

Offline Ben the Space Brit

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According to the twitter account of Iridium's boss, all 10 satellites are talking to them and are the post-launch health-checks seem good.
« Last Edit: 01/14/2017 06:49 pm by Ben the Space Brit »
"Oops! I left the silly thing in reverse!" - Duck Dodgers

~*~*~*~

The Space Shuttle Program - 1981-2011

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Offline oldAtlas_Eguy

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Here is to them having a smooth orbit maneuvering and final orbit insertion with functional checkouts successful so the next batch would launch in about 3 months. NET April 15.

Online meekGee

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hey - I am not sure about this, but did previous landing come in oriented so the legs are at 45 degrees?

This one landed at a random angle.

With grid fins, controlling rotation should be very easy, and not at the expense of anything else - but landing "straight" gives the most amount of tolerance to X-Y errors.

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Offline old_sellsword

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hey - I am not sure about this, but did previous landing come in oriented so the legs are at 45 degrees?

This one landed at a random angle.

With grid fins, controlling rotation should be very easy, and not at the expense of anything else - but landing "straight" gives the most amount of tolerance to X-Y errors.

The first stage is very tightly roll-controlled via ACS and grid fins, as seen in the Thaicom 8 landing video below. It seems to keep itself "facing the ground" (0 pointed at earth/launch site) during reentry. However they never land in any specific orientation to the ASDS because the ASDS orientation is based purely on local wave motion.

« Last Edit: 01/14/2017 07:27 pm by old_sellsword »

Offline Kaputnik

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Will these satellites become an operational part of the existing constellation, or will that have to wait until they are all flown?
"I don't care what anything was DESIGNED to do, I care about what it CAN do"- Gene Kranz

Online rockets4life97

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They are replacing the old with the new as they launch them. There is a video (probably in the update thread) about the process.

Offline Welsh Dragon

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The first stage is very tightly roll-controlled via ACS and grid fins, as seen in the Thaicom 8 landing video below. It seems to keep itself "facing the ground" (0 pointed at earth/launch site) during reentry. However they never land in any specific orientation to the ASDS because the ASDS orientation is based purely on local wave motion.

Good evidence of the roll control at about T+7:30 (just before start of landing burn),when the stage starts rolling, only to be swiftly kicked in the behind by the RCS at T+7:35, quickly nulling rates.
« Last Edit: 01/14/2017 08:16 pm by Welsh Dragon »

Offline Rocket Science

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My old workhorse computer got so excited it crashed and rebooted back up with 15 seconds to launch... :o  Just what I needed, more nail-biting... Thanks to all for the coverage and discussion to catch up on especially the ever enthusiastic Zach! :)
"The laws of physics are unforgiving"
~Rob: Physics instructor, Aviator, Vintage auto racer

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