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Pat Flannery
Posted: Wed Mar 26, 2008 5:49 pm
Guest
Eric Chomko wrote:
Quote:
On Mar 24, 8:24 pm, simberg.interglo...@org.trash (Rand Simberg)
wrote:

On Tue, 25 Mar 2008 00:05:13 GMT, in a place far, far away, Monte
Davis <monte.da...@verizon.net> made the phosphor on my monitor glow
in such a way as to indicate that:


Brian Thorn <bthor...@suddenlink.net> wrote:

Without Kennedy's moon mandate, U.S. space exploration in the '60s and
'70s would have been very different, obviously. But I don't at all
believe that would have been the end of Saturn/Apollo. With no moon
mandate (and that huge influx of cash)..

In other words, no moon race but all the money allotted to the moon
race available for other things?

OK, so in 1966 the flying pigs from Procyon IV arrived to give us the
anitmatter drive, and in 1968 President Timothy Leary decided...

(Hey, this is fun!)

Many space enthusiasts project their enthusiasm on the country. But
the reality is that if space, or going to the moon, were important,
we'd have done a lot more in the last forty years. Absent the Soviet
threat, there would have been no moon program, at least none
resembling NASA's plans.


Soviet threat?!? My dad worked in the Soviet Threats Division in Ft.
Leavenworth, KS (can the prison jokes)


License plates with "I Hate Communism" on them.... :-)

Pat
OM
Posted: Wed Mar 26, 2008 6:24 pm
Guest
On Wed, 26 Mar 2008 16:49:59 -0600, Pat Flannery <flanner@daktel.com>
wrote:

Quote:
Soviet threat?!? My dad worked in the Soviet Threats Division in Ft.
Leavenworth, KS (can the prison jokes)

....Well, this proves my one theory about how Chumpko came into being:
he was the result of unsafe prison sex.

Quote:
License plates with "I Hate Communism" on them.... Smile

"My Son Is A Squarehead At Leavenworth HS!"

OM
--
]=====================================[
] OMBlog - http://www.io.com/~o_m/omworld [
] Let's face it: Sometimes you *need* [
] an obnoxious opinion in your day! [
]=====================================[
Kevin Willoughby
Posted: Wed Mar 26, 2008 6:58 pm
Guest
In article <13uh7imcrej36b8@corp.supernews.com>, flanner@daktel.com
says...
Quote:
its first stage sucked from a
viewpoint of size, weight, and complexity versus capability.
Even von Braun's team knew it was a major kludge designed to use
off-the-shelf parts (right down to Redstone and Jupiter tankage
production facilities) to get something of fairly heavy payload
capability airborne ASAP.

Using known (I.e., fairly low risk) components to build a cheap and
quick way of getting something fairly heavy into orbit is a design that
sucks? Not to *this* engineer!
--
Kevin Willoughby kevinwilloughby@acm.org.invalid

Kansas City, this was Air Force One. Will you change
our call sign to SAM 27000? -- Col. Ralph Albertazzie
Pat Flannery
Posted: Wed Mar 26, 2008 9:19 pm
Guest
Kevin Willoughby wrote:
Quote:
Using known (I.e., fairly low risk) components to build a cheap and
quick way of getting something fairly heavy into orbit is a design that
sucks? Not to *this* engineer!

The von Braun team wasn't terribly fond of it, particularly the eight

engines, referring to it as "Cluster's last stand".
The eight engine arrangement gave them problems as far as ignition went,
and they had to make a lot of changes from stock Jupiter engines to get
a simultaneous ignition sequence on all eight.
They considered it a worthwhile booster to build as a stepping stone to
the F-1 powered Saturns, but not something you wanted to standardize on
for large-scale production.
That propellant tank layout in particular was a heavy way of doing things.
Go over to conventional tankage and the stage would shrink significantly
in size and weight for the same capability.
The H-1's probably weren't the most expensive of engines, but when you
need eight of them per booster it makes for a significant cost factor.
There's also the reliability factor to consider, the engine was fairly
well-proven by the time they built the Saturn I, but you still had a
much increased threat of a catastrophic failure of one engine would
spread to the others, causing the first stage to be destroyed, like the
thirty-engined N-1 was prone to behave.
That was also a factor to consider in regards to the original
six-engined cryogenic second stage.

Pat
Joseph Nebus
Posted: Wed Mar 26, 2008 9:30 pm
Guest
"hallerb@aol.com" <hallerb@aol.com> writes:

Quote:
Apollo moon is winding down. Now lets imagine the shuttle had never
been built. NASA looked at it and decided its flight rate wouldnt be
necessary, so operations would cost too much.

So they looked at making some of apollo reusable, and other cost
cutting ideas.

wonder what they would of come up with?

A eulogy for the United States's aviation industry? Or is a
portion of this alternate history something to salve the catastrophic
state of the early 70s, such as funding for a supersonic passenger
plane or something else of that ilk? Or does the L-1011 avoid its
troubles or the 747 not have such a bleak childhood in this timeline?

--
Joseph Nebus
------------------------------------------------------------------------------
Brian Thorn
Posted: Wed Mar 26, 2008 9:46 pm
Guest
On Wed, 26 Mar 2008 20:19:13 -0600, Pat Flannery <flanner@daktel.com>
wrote:


Quote:
Using known (I.e., fairly low risk) components to build a cheap and
quick way of getting something fairly heavy into orbit is a design that
sucks? Not to *this* engineer!

The von Braun team wasn't terribly fond of it, particularly the eight
engines, referring to it as "Cluster's last stand".

I thought it was his critics that called Saturn I that, not von Braun
or his team.

Brian
Pat Flannery
Posted: Thu Mar 27, 2008 12:01 am
Guest
Brian Thorn wrote:
Quote:
I thought it was his critics that called Saturn I that, not von Braun
or his team.


They told him to make something with high payload capability ASAP; he
succeeded brilliantly in doing that with the Saturn I; to the degree
that they didn't have a payload to launch on it when it was ready to go
(so they came up with the Pegasus micro-meteor measuring satellite in a
big hurry, especially with the Dyna-Soar program waning)
But this is the Peenemunde team given pretty much unlimited funding
under JFK's Moon challenge...you think for a moment that they are going
to be satisfied with a first stage made out of left-over Redstone and
Jupiter parts stuck together like so many Lego blocks?
Hell no.
It's clunky.
They had to settle for it under limited funding, but if the funding is
there, they can build something far better than that using a lot larger
engines...and not those low isp solids like the Air Force wanted...they
hated those in 1942, and they hated them in 1962.
They are not technologically "sweet", and that goes for hypergolic
liquid propellants either... again lower isp...at the very least you
settle for LOX/kerosene, and that's only till you can get LOX/LH2 or
cool things with liquid ozone and fluorine going as a stepping stone to
nuclear propulsion.
Their team was discussing nuclear rockets clean back in WW II.
Isp was the holy grail for them if they had the time and money to do it,
like any good German Mathematician would do when it comes to designing a
rocket.
' 'Iron Bridge Company?' Gott-damn that scheiss! As soon as von Braun's
cold and dead in the ground, we're going to start building ion-powered
giant parasols that fly to Mars!
MEIN FUHRER! I CAN EVA!" Smile
Seriously, what's interesting about all of this is that WvB was
basically a very conservative force holding the radical ideas of his
team in check. That's particularly obvious in regards to choosing
LOX/alcohol as propellants for the Redstone, or LOX/kerosene as the
propellants for the Jupiter.
Even back during WW II the tactical limitations of suppling LOX to V-2s
at their launch sites became obvious, and that's why the German military
wanted to go over to storable hypergolics in the improved versions.
The Soviets caught on to this quick, and employed it from the "Scud"
forward.
We didn't; we had the opportunity to do it with Corporal-based
technology, but outside the Titan II went straight from LOX-kerosene to
solids in all of our of our strategic and long-range ballistic missiles.

Pat
Eric Chomko
Posted: Thu Mar 27, 2008 5:54 am
Guest
On Mar 26, 6:49 pm, Pat Flannery <flan...@daktel.com> wrote:
Quote:
Eric Chomko wrote:
On Mar 24, 8:24 pm, simberg.interglo...@org.trash (Rand Simberg)
wrote:

On Tue, 25 Mar 2008 00:05:13 GMT, in a place far, far away, Monte
Davis <monte.da...@verizon.net> made the phosphor on my monitor glow
in such a way as to indicate that:

Brian Thorn <bthor...@suddenlink.net> wrote:

Without Kennedy's moon mandate, U.S. space exploration in the '60s and
'70s would have been very different, obviously. But I don't at all
believe that would have been the end of Saturn/Apollo. With no moon
mandate (and that huge influx of cash)..

In other words, no moon race but all the money allotted to the moon
race available for other things?

OK, so in 1966 the flying pigs from Procyon IV arrived to give us the
anitmatter drive, and in 1968 President Timothy Leary decided...

(Hey, this is fun!)

Many space enthusiasts project their enthusiasm on the country.  But
the reality is that if space, or going to the moon, were important,
we'd have done a lot more in the last forty years.  Absent the Soviet
threat, there would have been no moon program, at least none
resembling NASA's plans.

Soviet threat?!? My dad worked in the Soviet Threats Division in Ft.
Leavenworth, KS (can the prison jokes)

License plates with "I Hate Communism" on them.... :-)


Makes him seem to right-wing. My dad is a proud Democrat.

"Let me tell you why Communism will never work...", is more like it
but it won't fit on a license plate or even a bumper sticker. Smile
Eric Chomko
Posted: Thu Mar 27, 2008 5:57 am
Guest
On Mar 26, 7:24 pm, OM <om@all_trolls_must_DIE.com> wrote:
Quote:
On Wed, 26 Mar 2008 16:49:59 -0600, Pat Flannery <flan...@daktel.com
wrote:

Soviet threat?!? My dad worked in the Soviet Threats Division in Ft.
Leavenworth, KS (can the prison jokes)

...Well, this proves my one theory about how Chumpko came into being:
he was the result of unsafe prison sex.

License plates with "I Hate Communism" on them.... :-)

"My Son Is A Squarehead At Leavenworth HS!"

I went to Frankfurt American High School, OM! I was in college when my
dad had his second tour at Ft. Leavenworth. Yes, yes, once in
Leavenworth was not enough, blah, blah, blah.

You know who is also from that area? Melissa Etheridge the singer.
Yes, I know all about her, yet she has more money than you and her
health isn't quite as bad as yours...;)

Quote:

                                OM
--
   ]=====================================[
   ]   OMBlog -http://www.io.com/~o_m/omworld  [
   ]        Let's face it: Sometimes you *need*         [
   ]          an obnoxious opinion in your day!           [
   ]=====================================[
Eric Chomko
Posted: Thu Mar 27, 2008 6:03 am
Guest
On Mar 26, 6:40 pm, Brian Thorn <bthor...@suddenlink.net> wrote:
Quote:
On Wed, 26 Mar 2008 21:26:58 GMT, Monte Davis

monte.da...@verizon.net> wrote:
No, where did you get that idea from what I wrote?

From your words: "With no moon mandate (and that huge influx of
cash)..."

If you didn't mean the 1961-1968 bulge following on Kennedy's
commitment, what "huge influx of cash" *did* you mean?

I meant "no huge influx of cash".

Isn't the NASA budget 7/10 of 1% today as compared to 3% back in the
days of Apollo? Another way, 0.70% vs. 3.00% of the total US govt.
budget.

I don't doubt that the .7% today, is more $$$ than 3% back in the 60s
in $$$.

Quote:

Brian
Derek Lyons
Posted: Thu Mar 27, 2008 12:25 pm
Guest
Pat Flannery <flanner@daktel.com> wrote:

Quote:
Even back during WW II the tactical limitations of suppling LOX to V-2s
at their launch sites became obvious, and that's why the German military
wanted to go over to storable hypergolics in the improved versions.
The Soviets caught on to this quick, and employed it from the "Scud"
forward.
We didn't; we had the opportunity to do it with Corporal-based
technology, but outside the Titan II went straight from LOX-kerosene to
solids in all of our of our strategic and long-range ballistic missiles.

Thereby bypassing the limitations [and problems] of stored
hypergolics...

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

http://derekl1963.livejournal.com/

-Resolved: To be more temperate in my postings.
Oct 5th, 2004 JDL
Kevin Willoughby
Posted: Thu Mar 27, 2008 4:29 pm
Guest
In article <13ultgvajlo7k88@corp.supernews.com>, flanner@daktel.com
says...
Quote:
Kevin Willoughby wrote:
Using known (I.e., fairly low risk) components to build a cheap and
quick way of getting something fairly heavy into orbit is a design that
sucks? Not to *this* engineer!

The eight engine arrangement gave them problems as far as ignition went,
and they had to make a lot of changes from stock Jupiter engines to get
a simultaneous ignition sequence on all eight.

Really? I only recently learned that the S-V had a staggered start
sequence. Something like a full second between the start of the first
and last engines. Why would the same team choose two such different
sequences in starting a cluster? References, Pat, please -- I need to
learn more.


Quote:
They considered it a worthwhile booster to build as a stepping stone to
the F-1 powered Saturns, but not something you wanted to standardize on
for large-scale production.

uh, how many big liquid-fueled rockets went into large-scale production?
The A-4 (big by the standards of the 1940s), the R-7 family and, ummm,
well, err....

For small-scale production, R&D costs are really important. Using
existing, proven components in a brute-force design makes a lot more
sense than spending a zillion dollars to produce a handful of units with
elegant designs.


Quote:
That propellant tank layout in particular was a heavy way of doing things.
Go over to conventional tankage and the stage would shrink significantly
in size and weight for the same capability.

Sure, that would be a good "rev 2.0", but don't get yourself into a "the
best is the enemy of the good" mind-trap.


Quote:
The H-1's probably weren't the most expensive of engines, but when you
need eight of them per booster it makes for a significant cost factor.

Only if you are talking about large-scale production. For small-scale
production, minimizing R&D effort is paramount, even if you have to use
multiple (identical) components.
--
Kevin Willoughby kevinwilloughby@acm.org.invalid

Kansas City, this was Air Force One. Will you change
our call sign to SAM 27000? -- Col. Ralph Albertazzie
Pat Flannery
Posted: Thu Mar 27, 2008 4:52 pm
Guest
Derek Lyons wrote:
Quote:
Thereby bypassing the limitations [and problems] of stored
hypergolics...


The Soviets putting hypergolic-fueled missiles on submarines was
downright crazy.... as they found out the hard way on the K-219.
They became so enamored of hypergolic fuel that it seriously delayed
their introduction of large solid-fueled missiles.

Pat
Pat Flannery
Posted: Fri Mar 28, 2008 12:22 am
Guest
Kevin Willoughby wrote:
Quote:
In article <13ultgvajlo7k88@corp.supernews.com>, flanner@daktel.com
says...

Kevin Willoughby wrote:

Using known (I.e., fairly low risk) components to build a cheap and
quick way of getting something fairly heavy into orbit is a design that
sucks? Not to *this* engineer!


The eight engine arrangement gave them problems as far as ignition went,
and they had to make a lot of changes from stock Jupiter engines to get
a simultaneous ignition sequence on all eight.


Really? I only recently learned that the S-V had a staggered start
sequence. Something like a full second between the start of the first
and last engines. Why would the same team choose two such different
sequences in starting a cluster? References, Pat, please -- I need to
learn more.

I'm digging for it... but it may take some time; I thought it was in one

of the small Gatland space books, but it's not in there.
Quote:


They considered it a worthwhile booster to build as a stepping stone to
the F-1 powered Saturns, but not something you wanted to standardize on
for large-scale production.


uh, how many big liquid-fueled rockets went into large-scale production?
The A-4 (big by the standards of the 1940s), the R-7 family and, ummm,
well, err....


Delta II. They've made a fair number of those.

Pat
Dave Michelson
Posted: Fri Mar 28, 2008 12:42 am
Guest
Pat Flannery wrote:
Quote:

The eight engine arrangement gave them problems as far as ignition
went, and they had to make a lot of changes from stock Jupiter
engines to get a simultaneous ignition sequence on all eight.

Really? I only recently learned that the S-V had a staggered start
sequence. Something like a full second between the start of the first
and last engines. Why would the same team choose two such different
sequences in starting a cluster? References, Pat, please -- I need to
learn more.

I'm digging for it... but it may take some time; I thought it was in one
of the small Gatland space books, but it's not in there.

And for good reason!

Ref: TECHNICAL MEMORANDUM X-881 "APOLLO SYSTEMS DESCRIPTION - VOLUME II:
SATURN LAUNCH VEHICLES" 1 Feb 1964, p. 8-15.

"For structural considerations the H-1 engines are started in pairs:
inboard engines 5 and 7; inboard engines 6 and 8; outboard engines 2 and
4, and outboard engines 1 and 3."

http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19710065502_1971065502.pdf

--
Dave Michelson
davem@ece.ubc.ca
 
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