Rocksolid Light

Welcome to novaBBS (click a section below)

mail  files  register  newsreader  groups  login

Message-ID:  

This screen intentionally left blank.

tech / sci.space.policy / Re: Atmosphere at time of Falcon separation

SubjectAuthor
* Atmosphere at time of Falcon separationJF Mezei
`* Re: Atmosphere at time of Falcon separationSylvia Else
 `* Re: Atmosphere at time of Falcon separationSnidely
  `- Re: Atmosphere at time of Falcon separationSnidely

1
Atmosphere at time of Falcon separation

<OYevI.25211$v01.20711@fx07.iad>

  copy mid

https://www.novabbs.com/tech/article-flat.php?id=2939&group=sci.space.policy#2939

  copy link   Newsgroups: sci.space.policy
Path: i2pn2.org!i2pn.org!aioe.org!feeder1.feed.usenet.farm!feed.usenet.farm!news.uzoreto.com!fdc3.netnews.com!news-out.netnews.com!news.alt.net!fdc2.netnews.com!peer02.ams1!peer.ams1.xlned.com!news.xlned.com!peer03.iad!feed-me.highwinds-media.com!news.highwinds-media.com!fx07.iad.POSTED!not-for-mail
Newsgroups: sci.space.policy
X-Mozilla-News-Host: news://pbdl.astraweb.com:119
From: jfmezei....@vaxination.ca (JF Mezei)
Subject: Atmosphere at time of Falcon separation
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:52.0)
Gecko/20100101 Thunderbird/52.3.0
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Language: en-US
Content-Transfer-Encoding: 7bit
Lines: 10
Message-ID: <OYevI.25211$v01.20711@fx07.iad>
X-Complaints-To: https://www.astraweb.com/aup
NNTP-Posting-Date: Mon, 07 Jun 2021 01:51:42 UTC
Date: Sun, 6 Jun 2021 21:51:42 -0400
X-Received-Bytes: 1038
 by: JF Mezei - Mon, 7 Jun 2021 01:51 UTC

Sanity check:

At time of first stage separation for Falcon 9 and lighting of stage 2,
we can see the foil "blanket" that is higher up from the engine bell on
stage 2 move.

Is this movement due to wind at that altitude/speed (about 100km) or
just the blanket moving due to ship accelerating?

Re: Atmosphere at time of Falcon separation

<ii5fnbFg2pU1@mid.individual.net>

  copy mid

https://www.novabbs.com/tech/article-flat.php?id=2940&group=sci.space.policy#2940

  copy link   Newsgroups: sci.space.policy
Path: i2pn2.org!i2pn.org!usenet.goja.nl.eu.org!3.eu.feeder.erje.net!feeder.erje.net!news2.arglkargh.de!news.karotte.org!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail
From: syl...@email.invalid (Sylvia Else)
Newsgroups: sci.space.policy
Subject: Re: Atmosphere at time of Falcon separation
Date: Mon, 7 Jun 2021 12:48:09 +1000
Lines: 16
Message-ID: <ii5fnbFg2pU1@mid.individual.net>
References: <OYevI.25211$v01.20711@fx07.iad>
Mime-Version: 1.0
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Transfer-Encoding: 7bit
X-Trace: individual.net nip83ivemZofdd99/C6yNgH8VMu8wgUqauOL1Beo+0kw6ToB7u
Cancel-Lock: sha1:NrINmnsxZ5LZwnhSkKAVsALLsuo=
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101
Thunderbird/78.11.0
In-Reply-To: <OYevI.25211$v01.20711@fx07.iad>
Content-Language: en-GB
 by: Sylvia Else - Mon, 7 Jun 2021 02:48 UTC

On 07-Jun-21 11:51 am, JF Mezei wrote:
> Sanity check:
>
> At time of first stage separation for Falcon 9 and lighting of stage 2,
> we can see the foil "blanket" that is higher up from the engine bell on
> stage 2 move.
>
> Is this movement due to wind at that altitude/speed (about 100km) or
> just the blanket moving due to ship accelerating?
>
>

Effect of changing acceleration (as the fuel is depleted) in combination
with vibration.

Sylvia.

Re: Atmosphere at time of Falcon separation

<mn.38eb7e5688a7b552.127094@snitoo>

  copy mid

https://www.novabbs.com/tech/article-flat.php?id=2941&group=sci.space.policy#2941

  copy link   Newsgroups: sci.space.policy
Path: i2pn2.org!i2pn.org!eternal-september.org!reader02.eternal-september.org!.POSTED!not-for-mail
From: snidely....@gmail.com (Snidely)
Newsgroups: sci.space.policy
Subject: Re: Atmosphere at time of Falcon separation
Date: Mon, 07 Jun 2021 03:55:46 -0700
Organization: Dis One
Lines: 28
Message-ID: <mn.38eb7e5688a7b552.127094@snitoo>
References: <OYevI.25211$v01.20711@fx07.iad> <ii5fnbFg2pU1@mid.individual.net>
Reply-To: snidely.too@gmail.com
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"; format=flowed
Content-Transfer-Encoding: 8bit
Injection-Info: reader02.eternal-september.org; posting-host="53cad5d10f337527bbb6f5f8aaccfd72";
logging-data="20462"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX18grwqxuhDbV32MteZ5sU35Ut2VROkXSDQ="
Cancel-Lock: sha1:3HbhvcoK9Nm/vdh01KZ5/jSj2L4=
X-Newsreader: MesNews/1.08.06.00-gb
X-ICQ: 543516788
 by: Snidely - Mon, 7 Jun 2021 10:55 UTC

on 6/6/2021, Sylvia Else supposed :
> On 07-Jun-21 11:51 am, JF Mezei wrote:
>> Sanity check:
>>
>> At time of first stage separation for Falcon 9 and lighting of stage 2,
>> we can see the foil "blanket" that is higher up from the engine bell on
>> stage 2 move.
>>
>> Is this movement due to wind at that altitude/speed (about 100km) or
>> just the blanket moving due to ship accelerating?
>>
>>
>
> Effect of changing acceleration (as the fuel is depleted) in combination with
> vibration.

I figured it was a side effect of pressurizing the feed lines.

Does that engine gimbal or do they depend only on thrusters for 2nd
stage guidance?

/dps

--
"That’s where I end with this kind of conversation: Language is
crucial, and yet not the answer."
Jonathan Rosa, sociocultural and linguistic anthropologist,
Stanford.,2020

Re: Atmosphere at time of Falcon separation

<mn.20637e571823d895.127094@snitoo>

  copy mid

https://www.novabbs.com/tech/article-flat.php?id=2992&group=sci.space.policy#2992

  copy link   Newsgroups: sci.space.policy
Path: i2pn2.org!i2pn.org!eternal-september.org!reader02.eternal-september.org!.POSTED!not-for-mail
From: snidely....@gmail.com (Snidely)
Newsgroups: sci.space.policy
Subject: Re: Atmosphere at time of Falcon separation
Date: Sun, 04 Jul 2021 01:39:55 -0700
Organization: Dis One
Lines: 31
Message-ID: <mn.20637e571823d895.127094@snitoo>
References: <OYevI.25211$v01.20711@fx07.iad> <ii5fnbFg2pU1@mid.individual.net> <mn.38eb7e5688a7b552.127094@snitoo>
Reply-To: snidely.too@gmail.com
Mime-Version: 1.0
Content-Type: text/plain; charset="iso-8859-15"; format=flowed
Content-Transfer-Encoding: 8bit
Injection-Info: reader02.eternal-september.org; posting-host="c6a8d01f9f7bc2511ac851926bcf4e49";
logging-data="13094"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX18w8siHTFhrR8AqJGTmljee+zDWA8x8J1I="
Cancel-Lock: sha1:Vu5K8lb4gc/Da/GPtesUInUmams=
X-Newsreader: MesNews/1.08.06.00-gb
X-ICQ: 543516788
 by: Snidely - Sun, 4 Jul 2021 08:39 UTC

After serious thinking Snidely wrote :
> on 6/6/2021, Sylvia Else supposed :
>> On 07-Jun-21 11:51 am, JF Mezei wrote:
>>> Sanity check:
>>>
>>> At time of first stage separation for Falcon 9 and lighting of stage 2,
>>> we can see the foil "blanket" that is higher up from the engine bell on
>>> stage 2 move.
>>>
>>> Is this movement due to wind at that altitude/speed (about 100km) or
>>> just the blanket moving due to ship accelerating?
>>>
>>>
>>
>> Effect of changing acceleration (as the fuel is depleted) in combination
>> with vibration.
>
> I figured it was a side effect of pressurizing the feed lines.
>
> Does that engine gimbal or do they depend only on thrusters for 2nd stage
> guidance?

Pre-launch, the 2nd stage did an engine wiggle test, so I guess it
gimbals.

/dps

--
"First thing in the morning, before I have coffee, I read the obits, If
I'm not in it, I'll have breakfast." -- Carl Reiner, to CBS News in
2015.

1
server_pubkey.txt

rocksolid light 0.9.8
clearnet tor