Apollo service module question

Jochem Huhmann wrote:

Pat Flannery writes:

Ah yes, the Russian ISS fans:
http://www.newscientist.com/article/...s-hearing.html

Yeah, I can very well imagine that noise is a major point of stress
there. Probably much like living in string of server rooms with
countless computer fans whirring all the time. I think I could stand
that for a week or so but not much longer. Whenever I see a video from
up there and listen to the audio I think "just like a long workday in
the machine room, just without going home afterwards".

No different than what we put up with on the boats, and it's not much
better on surface craft. Didn't cause any stress.

D.
--
Touch-twice life. Eat. Drink. Laugh.

http://derekl1963.livejournal.com/

-Resolved: To be more temperate in my postings.
Oct 5th, 2004 JDL

Pat Flannery wrote:

Jochem Huhmann wrote:
Yeah, I can very well imagine that noise is a major point of stress
there. Probably much like living in string of server rooms with
countless computer fans whirring all the time. I think I could stand
that for a week or so but not much longer. Whenever I see a video from
up there and listen to the audio I think "just like a long workday in
the machine room, just without going home afterwards".

There's a distinct downside to it besides the hearing loss and annoyance
factor also... all that noise is going to cover up sounds of other
things that may be malfunctioning that you would want to shut down
immediately if you could hear them.

Not once you are used to the sounds around you. Been there, done
that, and it wasn't a problem.

D.
--
Touch-twice life. Eat. Drink. Laugh.

http://derekl1963.livejournal.com/

-Resolved: To be more temperate in my postings.
Oct 5th, 2004 JDL

Derek Lyons wrote:
Pat Flannery wrote:

Derek Lyons wrote:
We kept the hatches open because it prevented pressure differentials
from building up and made atmosphere circulation easier.
Did our sub's hatches have some way of equalizing pressure between two
compartments after being closed and sealed?

Yeah, but it wasn't very big.


Well, I'm glad at least _we_ thought of that.

Pat

Derek Lyons wrote:

No different than what we put up with on the boats, and it's not much
better on surface craft. Didn't cause any stress.

The article spoke of permanent high frequency hearing loss on the Salyut
and Mir crews...nothing you would want in regards to your sonarmen on a sub.

Pat

Dr.Smith wrote:

If memory serves correctly the engine bell was much larger then was
needed for lunar docking method. Going along with this a think there
may have been plans afoot to use actuators of some sort to extend and
withdraw the bottom section of engine bell so as to allow for
landing. Guess they got far enough along so they could not redesign
engine/bell when they changed methods and so bell is a bit of fossil
remnant from the direct ascent method.................Doc

Sounds very unlikely to me. Once they'd chosen to use LOR they
had to design and build a spacecraft (the LM) from scratch... and
they didn't have time to shave some weight off the CSM?

"Fevric J. Glandules" wrote:

Dr.Smith wrote:

If memory serves correctly the engine bell was much larger then was
needed for lunar docking method. Going along with this a think there
may have been plans afoot to use actuators of some sort to extend and
withdraw the bottom section of engine bell so as to allow for
landing. Guess they got far enough along so they could not redesign
engine/bell when they changed methods and so bell is a bit of fossil
remnant from the direct ascent method.................Doc

Sounds very unlikely to me. Once they'd chosen to use LOR they
had to design and build a spacecraft (the LM) from scratch... and
they didn't have time to shave some weight off the CSM?

Keep in mind that a lot of things were going on in parallel. Once the
SM design was fixed, it may not have been worth it to resdesign it.

D.
--
Touch-twice life. Eat. Drink. Laugh.

http://derekl1963.livejournal.com/

-Resolved: To be more temperate in my postings.
Oct 5th, 2004 JDL

Fevric J. Glandules wrote:


Sounds very unlikely to me. Once they'd chosen to use LOR they
had to design and build a spacecraft (the LM) from scratch... and
they didn't have time to shave some weight off the CSM?

Remember, the Service Module and its engine bell would have formed the
_ascent_ stage of the lander in the direct ascent method.
The landing stage was separate and far larger than the SM:
http://www.brighthub.com/bh_controls...d=26808&page=1

Pat

"Pat Flannery" wrote in message
dakotatelephone...
Fevric J. Glandules wrote:


Sounds very unlikely to me. Once they'd chosen to use LOR they had to
design and build a spacecraft (the LM) from scratch... and
they didn't have time to shave some weight off the CSM?

Remember, the Service Module and its engine bell would have formed the
_ascent_ stage of the lander in the direct ascent method.
The landing stage was separate and far larger than the SM:
http://www.brighthub.com/bh_controls...d=26808&page=1


Yea, the landing stage for the direct method was absolutely freaking huge.
That's why direct would have required the Nova launcher. It would have made
Saturn V look small by comparison.

Jeff
--
"Take heart amid the deepening gloom
that your dog is finally getting enough cheese" - Deteriorata - National
Lampoon

Jeff Findley wrote:
Yea, the landing stage for the direct method was absolutely freaking huge.

I once remember it being described as like trying to land a Atlas ICBM
tail-first.
The Soviet direct ascent lander was a lot smaller:
http://www.novosti-kosmonavtiki.ru/c...s/200/36.shtml
It used a separate stage to brake it into and out of lunar orbit, which
was jettisoned before landing: http://www.astronautix.com/craft/lk700.htm

Pat

Derek Lyons wrote:

"Fevric J. Glandules" wrote:

Sounds very unlikely to me. Once they'd chosen to use LOR they
had to design and build a spacecraft (the LM) from scratch... and
they didn't have time to shave some weight off the CSM?

Keep in mind that a lot of things were going on in parallel. Once the
SM design was fixed, it may not have been worth it to resdesign it.

Big lump of metal like an engine bell? Sorry, not buying it.
They had time, and motivation.