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the chance of one crashing over a populated area is thus small
yes, especially if you live in Alaska
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Shuttle does have a few more design criteria than that. Namely, it transports seven crew to and from LEO together with 23 MT of cargo. It provides an orbit working environment (including robot arm and airlock) for about two weeks. Except for the external tank, it's fully reusable. It's a remarkable vehicle, there's no other vehicle in the world that has that capability.
finally, you agree with me on something
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Do you ever say anything positive?
your critic is wrong at its basis... on the web you can find 70% of space agencies' supporters-only and 30% of critics-only
peoples like me (that, do critics, but, also, suggest solutions and alternatives) are VERY RARE
also, I think that MY critics always are POSITIVE since, if (e.g.) I claim that the Ares-1 can't fly and it results TRUE, a giant amount of R&D money could be saved
you criticize the shuttle and the ISS
I've never posted just ONE word against the ISS since I think it's crazy to srap the ONLY manned thing we have in space (without mention its price)
about the Shuttle, I think its too old and dangerous but can still work if modified to be safer or fly crewless (as explained in my articles)
also, I support the idea of a new, better, safer and cheaper shuttle for LEO operations since its ways better than capsules (just see my visual shuttl-capsule comparison)
Ariane
about the Ariane, I've only suggested to use it to launch the orbital-Orion (that's lighter than its lunar version) and proposed a new ArianeX to EUROPE
Energia
NEVER suggested the (dead) Energia
shuttle-tech to develop a new STS
I agree that use the STS hardware is inevitable, but I've suggested to use it in a better way
I want you to make, without referencing to your private websites or your 'proposed' designs, a single positive post about Ares, Orion, or Altair.
I'm sorry but I think that a (new and cheaper) Shuttle is better for LEO operations and that the full ESAS architecture is wrong and should be changed
I've already said that several times and its seems NASA (by its own think, of course, not after reading my articles... ) has done some changes like the Ares-1/Ares-5 launch swap and the lunar outpost/sortie missions swap
however, the ESAS plan still need many many many changes to be better than Apollo
of course, I must admit that a capsule is the only choice for moon missions, and, again, critics ARE positive, since they can allow to design better vehicles!
you've taken the negative bit so much that you sound like a zealous politician
I've posted critics about the ESAS hardware, the Kliper, the european choices, the SS2, etc. since I think they are REALLY wrong designed/made, NOT because "I like" to be "negative"
might criticize the SRBs but might applaud positioning the crew capsule out of harm's way to avoid the fate of the shuttle orbiters
I've never said that since its obvious, like positive claims are... only talk about critics is useful and make sense, I can't lose time to just say that a Ferrari is a good car or a Rolex is a good watch
about the SRB, you can read LOTS of positive words in my articles and posts about the advantages of the ready available, cheap, reliable and already man-rated standard SRB vs. the new 5-seg. version
"spammage"
I can't transfer my entire website and blog on many space forums and blog to avoid to be accused of spam everytime I put a link to my articles
hyperlinks is the very essence of the web since they allow many other pages to be PART of the text you're reading
the entire web works this way, wikipedia has dozens link in every article that, clearly, are not "spam"
"spam" is when one put a link on a space, apple, car, etc. forums to sell Viagra or promote porn sites
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Parachute landing systems augmented by air bags and or retro rockets have been under study by NASA since the early days of Orion. See earlier messages in this topic.
(gaetanomarano, this seems to be a duplicate, self promotional message. Unless there are reasons to keep it, it will be removed as spam.)
I don't want that you read all my articles (if you have something better to do) but, if you don't read them, you can't see the difference
I know the original Orion airbag system, but it's 1.5 mT heavy and too dangerous (due to its jettisoned TPS) then, I've suggested two (lighter) solutions NEVER proposed by NASA
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Ariane modifications
time ago I've read a rumor about that but I don't know more, just hope they'll do it
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...even small changes to the thrust can induce large vibration...
a further good reason to scrap the 5-segments SRB and go back to tested and reliable 4-segments SRB ...like I've said in last 1.5 years
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Areas with millions of people
Every day of the week
Hundreds of times
you're right on that, but, it's also the reason why the airplanes are a widely accepted risk: they are VERY reliable ... while ALL rockets NEVER can be reliable like an airline jet
the reason is that all manned and unmanned rockets are launched in dozens to hundreds units, while the airlines' jets are "launched" millions times per year
ALL spacecrafts ALWAYS are/will be EXPERIMENTAL vehicles!
that's why an airline jet can fly 20,000 times without crash, while the Shuttles crashed TWO times in 130 flights
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...the wings would help...
the vibrations can't act down to up since the acceleration is very much higher
can't act up to down for the inverse reason
the vibrations can be only in the horizontal sense
the wings DON'T eliminate the vibrations but only its EFFECT stabilizing the rocket since, at multi-sonic speed, they works like "blades" in the air
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The coupling between the external airflow and (possible) vehicle oscillations at the RSRB burnout altitude around 40 kms, would be too small to significantly reduce it.
I'm not sure that my idea can work, however, I suggest to test it in a wind tunnel
at multi-sonic speed four small wings works like bigger wings at subsonic speed and its aerodynamic force could be enough to replace the stabilizing effects of the Shuttle+ET in the stardard SRB launch
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I've developed a (possible) solution for the Ares-1 "vibrations" problem explained in my latest ghostNASA article:
http://www.ghostnasa.com/posts/022novibrations.html
the idea is (simply) to put four small wings to the Ares-1 interstage to stabilize the flight and avoid too much vibrations
about the "shock absorbing" seats for the astronauts, I've already suggested it (six months ago) to allow (also) a LAND landing of the Orion WITHOUT the (1.5 mT heavy) landing airbags:
http://www.gaetanomarano.it/articles/031easyways.html
(it's the sixth idea in the article)
that (also) can avoid to use the (VERY DANGEROUS) jettisoned TPS:
http://www.gaetanomarano.it/articles/022orionTPS.html
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Orion and the Ares launchers are not designed as a replacement for Shuttle.
that's true since (simply) it CAN'T
They are designed for lunar exploration and beyond, including Mars.
the new Moon missions date shift every day... 2020... 2022... just add a other delays and it will shift to 2025 when other countries will land with cheaper vehicles... about Orion and Mars... no comment...
...a COTS or other commercial vehicle...
IF will works, of course
...Ares V will deliver 130 MT of cargo to LEO for less cost than one Shuttle flight...
the only problem is that the Shuttle EXIST while the Ares-5 will fly after 2020... also, the first dozen of Ares-5 will be used for Moon missions, so, without a big extra-budget, NO Ares-5 will be available for other purposes until 2025 or later
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(just joking about folks)
your jokes can't hide the reality and the reality is that in 2010 will be retired a wonderful vehicle that has accomplished MANY wonderful missions in Space, to be replaced in 2016 (or later) with a very very expensive "Space Suppository" launched one-two times per year (if NASA will have enough money) with 3 astronauts (the SAME work the old soviet Soyuz does from '60s at a small FRACTION of the price)
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...the Shuttle...
TOO easy to say NOW that it's a mistake!
now the Shuttles are old and dangerous, have had two accidents and the annual costs "seems" high... but in '70s it was a GREAT idea if compared with the costs of a SaturnV launch!
don't forget, that ALL SaturnV-Apollo launches was VERY VERY VERY EXPENSIVE and ENTIRELY EXPENDABLE with just a small "cooked" capsule bringed back
compared with Apollo, the Shuttle was 80% reusable in weight and 95% reusable in value
also, the Shuttle was able to carry up to 8 astronauts (vs. the 3 astronauts of Apollo) and up to 28 mT (reduced to 24 mT for safety reasons after the Challenger accident) of cargo (compared with a few rocks of Apollo) ...and just add the larger internal space, the toilet, the airlock, the canadarm, the assembly and repair ability, the landing on runways rather than ocean, etc.
last, I've said that a Shuttle launch "seems" (not "IS") expensive since it's NOT expensive if compared with an Orion launch
if we consider only to-day's evaluated costs (that will grow very much) each Orion/Ares-1 launch will cost over $1 billion (hardware + shared annual fixed costs + shared R&D costs) to carry ONLY 3-4 astronauts OR 3 mT of cargo (with the deleted cargo version)
the "price" of a Shuttle launch depends of the number of launches per year
with an annual budget around $3.2 billion, each Shuttle launch costs between $600M if launched 5 times per year to $1000M if launched 3 times per year
but, despite its price-per-launch is the same or lower than an Orion launch, ONE Shuttle launch is able to carry TWICE+ the astronauts (up to 8, but it was designed for 10) AND up to EIGHT times the cargo (24 mT max) of an Orion!!!
in other words, to carry the same crew and cargo of ONE Shuttle launch you'll need TEN+ Orion launches (2+ crew and 8 cargo) with a total cost in excess of $10 billion!!!
as already explained 20 months ago in this "spam" page: http://www.gaetanomarano.it/articles/008visual.html
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spam
ultimately, "spam" are all emails or posts to sell Viagra, etc. NOT the posts with arguments you don't like
they just pick the worst design
that's exactly what I'm saying
How are you going to react if/when the Ares-1 has a successful launch?
that day, I'll just say they have solved the Ares-1 problems adding more power to both stages
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...gramar errors...
I can't write in a better english until I'll have time to learn a better grammar
...your multicolored rants as spam...
I've already said why my proposals and arguments NEVER are "spam"
about "multicolored" I don't put that colors here but ONLY on MY websites (where, I hope, I can do what I want)
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What is the peak thrust of the 5 segment?
the only REAL figure comes from the ATK test ... no better figure yet
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5 segment RSRB has a liftoff thrust of 1592 MTf, that's exactly 25% more than the 4 segment RSRB with 1270 MTf
just read the Ares-1 specs in my article (that are the same you've published here) ...the 1st stage has 3,510,791 lbf thrust that is a +7% more than the 4-seg.SRB 3,300,000 lbf peak thrust
or, if still have any doubt, just read the results of the ONLY REAL 4+1 segments SRB test (made in 2003 at the ATK facility) in this NASA article:
http://www.nasa.gov/centers/marshall/ne … 3-186.html
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And what is the stack mass after 10 seconds, and what is the thrust?
you should read again my "Ares-1 can't fly" article
I've said that a 4-seg.SRB CLV "could" fly (also since its specs matches the Shuttle SRB specs) while the 5-seg.SRB can't since its 5th segment adds (+25%) more weight than thrust (+7%)
of course, if the NASA and ATK engineers will be able to increase the 5-seg.SRB thrust by +25%, also the Ares-1 "could" (probably) be able to fly
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the first stage thrust is 1592 MT
just ten seconds, ten second after lift-off
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If Ares I is so badly designed it can't fly ...
I can't add the word "IF" since the article reflects my opinion, and my opinion is that the current designed Ares-1 can't fly
about the Griffin's claim, it (simply) could be the final hope of the Ares-1 development ("IF" more thrust than weight will be added to the SRB-5)
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Ares I is so badly designed it can't fly
a 4-seg.SRB + SSME-class "J-2Y" + resized Orion Ares-1 version "could" fly
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sorry, but, I (don't only) think that the Ares-1 is a bad designed rocket (that can't fly) but (also) that it could become VERY dangerous if a manned or test launch abort occurs
that since and SRB-5, without the ejected Orion and the broken 2nd stage, it could reach (and fall on) the cities around KSC, as explained in this ghostNASA article:
http://www.ghostnasa.com/posts/021chillinglaunch.html
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During his speech yesterday about the Constellation architecture, Mike Griffin talks in detail about this possible thrust oscillation problem and discusses the different ways it can be solved.
my proposal has several other advantages rather than just solve the "vibrations" problem (if any)
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the SOLUTION for the Ares-1 and 5-segments SRB dangerous "vibrations" ALREADY EXISTS
I've suggested the solution of all Ares-1 problems TEN MONTHS AGO in my "Ares-F" article:
http://www.gaetanomarano.it/articles/024aresF.html
the SRB-5 vibrations problems (that's unexisting in the 4-segments SRB) comes from it's lenght and the fact that it's a SINGLE motor
well, my Ares-1 design uses three (shorter, smaller and cheaper) Ariane-5 EAPs, then, it could have LESS "vibrations" problems of the 4-segments SRBs!!!
also, this solution adds many advantages, since the three EAPs...
1. they have the SAME burning time of the SRBs
2. thay give MORE thrust of the (theoric) 5-segments SRB
3. they are READY AVAILABLE NOW while, the 5-segments SRB (IF works) will be available in 2011
4. the three EAP are cheap like an expendable 4-segments SRB ($45M) since each EAP costs only $15M while the 5-segments SRBs will be VERY HIGH PRICED:
http://www.ghostnasa.com/posts/018srb5nonsense.html
a further suggestion in my article is to use the (J-2X similar) Vulcain 2 tha's READY AVAILABLE NOW and only need to be man-rated and air-started (while the J-2X will be ready to fly after 2012)
about the "political" problem of the Ares-F hardware... just buy the EAP and Vulcain 2 license and do make them in USA by ATK and Pratt & Whitney Rocketdyne
this is the only viable solution to save time and money and have the Ares-F ready to fly within 3-4 years (then, just in time to launch the Orion, that will be ready to fly in 2012)
and, don't forget, that my Ares-F will replace a rocket (the current design Ares-1) that ("vibrations or not vibrations") can't fly:
http://www.ghostnasa.com/posts/012arescantfly.html
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Reuse is hard to do, it adds mass and complexity to a launcher, and therefore makes it more expensive.
it will be very hard to develop a reusable liquid propellents' rocket (since it's much more fragile than an empty SRB) but, when someone will succeed in the effort, a reusable rocket will be not so heavy nor complex and will be very cheap... just imagine if the Falcon-1 1st stage (about a $5M value) will be 10+ times reusable... each Falcon 1 launch may cost $1.5M + $0.5M = $2M only
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