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so... the Ares-1 is DEAD
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early rumors from the Obama-Bolden meeting say that the Ares-1 is DEAD: -- http://blogs.sciencemag.org/sciencei...siveobama.html -- as already said two weeks ago in my “Why the Ares-1 is already DEAD” article: -- http://www.ghostnasa.com/posts2/058ares1dead.html -- |
#2
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so... the Ares-1 is DEAD
On Dec 18, 5:18*am, gaetanomarano wrote:
-- early rumors from the Obama-Bolden meeting say that the Ares-1 is DEAD: --http://blogs.sciencemag.org/scienceinsider/2009/12/exclusiveobama.html -- as already said two weeks ago in my “Why the Ares-1 is already DEAD” article: --http://www.ghostnasa.com/posts2/058ares1dead.html -- Thanks for that info. Since we will be using a heavy lift launcher to be ready by 2018, this will be well within the time range to allow a new heavy thrust liquid fueled engine to be developed. As I argued before considering the development already done on the RS-84 heavy thrust kerosene engine, a prototype version could be ready by 2012 if development was restarted this year: RS-84 Engine. http://www.pwrengineering.com/datare...neOverview.pdf This article from 2002 stated the development costs for two heavy thrust liquid fueled prototypes would cost $1.3 billion: TICKET TO RIDE. "Potential replacements for the Space Shuttle are taking shape as NASA struggles to finalise the requirements for a second-generation reusable launch vehicle." GRAHAM WARWICK / WASHINGTON DC 8-14 OCTOBER 2002 FLIGHT INTERNATIONAL "Engine development" "The success of our architecture depends on the success of NASA's engine development programme," says Young. The space agency is funding work on four main engine candidates, two hydrogen fueled and two kerosene-fueled. Pratt & Whitney and Aerojet are developing the Cobra, a 600,000 lb-thrust (2,670kN) hydrogen-fueled, staged-combustion, first and second-stage engine, while Boeing's Rocketdyne division is working on the 650,000 lb thrust-class RS-83. Rocketdyne is also pursuing the RS-84, a kerosene fueled, staged-combustion, first-stage engine generating 1,100,000 lb thrust, while TRW is developing the 1,000,000 lb thrust-class TR107. The plan is to test two prototype engines at a cost of $1.3 billion. "NASA will go for prototype engines that bracket the requirements of the three contractors," says Ford. He suggests the emphasis has shifted towards the kerosene-fuelled engines. "NASA wants to address kerosene first to reduce risk," he says. The USA has little experience with kerosene-burning rocket motors, having focused for decades on cryogenic engines." http://www.flightglobal.com/pdfarchi...0-%202996.html Then if NASA chose to develop one of these, such as the RS-84, to save costs, it conceivably might only cost $650 million (!) Then since the Air Force also wants a heavy thrust LOX/kero engine for its flyback booster program, the cost to NASA if the costs were shared might only be $325 million. NASA would only have to spend $108 million per year over 3 years to develop a reusable heavy thrust engine(!!) Also, the Air Force is already funding a heavy lift engine to power their proposed flyback boosters. However, since they're envisioning the heavy lift versions of such boosters to be used 1 to 2 decades down the road, they are taking a leisurely approach to the development of such an engine: Developers Seek to Speed Reusable Rocket Engines. Apr 10, 2008 By Guy Norris/Colorado Springs, Colo "Aerojet is meeting with the US Air Force in a bid to speed development of a US-designed, reusable hydrocarbon rocket engine that could play a key part in plans for an operationally responsive space vehicle. "Dubbed HC Boost, the technology development program is aimed at providing an improved, home-grown alternative to the Russian RD-180, the only other viable current-production hydrocarbon rocket engine. Unlike the RD-180, however, the US engine would be designed to be re- usable for up to 100 missions, have up to 15% better performance and would operate for up to 50 missions between engine overhauls. "More importantly perhaps, says the Air Force Research Laboratory (AFRL) which is leading the program, it would help pave the way for responsive access to space in terms of days and weeks, rather than months. The development would also, it says, free up U.S. dependency from the Energomash-produced RD-180, which is used to power the Atlas V launcher. "Aerojet is currently working on the HC Boost under a $109 million contract spread over almost nine years. The Sacramento, Calif.-based rocket specialist believes that more can be achieved by compressing the schedule and, at the same time, shifting the focus from a pure technology-driven research effort to a demonstration effort. "If we can do it in half the time they'd get a lot more for the money," says Aerojet president Scott Neish." http://www.aviationweek.com/aw/gener...08.xml&show=us Aerojet wants to accelerate this pace to perhaps 4 to 5 years and produce a prototype engine, undoubtedly also requiring increased funding. It's interesting this time frame would be about the same time it took to produce a working prototype of the Rocketdyne RS-84 heavy lift hydrocarbon engine if its development was restarted this year. Whether it's the Aerojet version or the Rocketdyne version, I definitely think that for low cost access to space, early development of such an engine should be made a priority. Bob Clark |
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so... the Ares-1 is DEAD
Robert Clark writes:
says Ford. He suggests the emphasis has shifted towards the kerosene-fuelled engines. "NASA wants to address kerosene first to reduce risk," he says. The USA has little experience with kerosene-burning rocket motors, having focused for decades on cryogenic engines." http://www.flightglobal.com/pdfarchi...0-%202996.html I don't get this last quote from Bob Ford of Martin. Maybe that's true of Martin after the Titan I, but the Atlases and Deltas marched on with RP-1 for quite some time. However, I see the Atlas-V uses the Russian RD-180. So exactly what is the state of RP-1 rocketry in the USA? Is it as dire as Bob Ford would have us believe? I'm sceptical of that statement. Dave |
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so... the Ares-1 is DEAD
David Spain wrote in
: Robert Clark writes: says Ford. He suggests the emphasis has shifted towards the kerosene-fuelled engines. "NASA wants to address kerosene first to reduce risk," he says. The USA has little experience with kerosene-burning rocket motors, having focused for decades on cryogenic engines." http://www.flightglobal.com/pdfarchi...0-%202996.html I don't get this last quote from Bob Ford of Martin. Maybe that's true of Martin after the Titan I, but the Atlases and Deltas marched on with RP-1 for quite some time. However, I see the Atlas-V uses the Russian RD-180. So exactly what is the state of RP-1 rocketry in the USA? Is it as dire as Bob Ford would have us believe? I'm sceptical of that statement. The Russians have extensive experience with high-thrust staged- combustion engines, whereas the only largish US hydrocarbon engine developed to active flight status has been SpaceX's Merlin, which is a straightforward 'legacy' design, meant to be simple and inexpensive, as are the engines flown on earlier versions of Delta and Atlas. I would like very much to see staged-combustion hydrocarbon engines developed and flown in the US, but it's not going to be cheap. At the moment, SpaceX is the "leader" in the US by being retrotech. And I'm not sure that building engines based on the NK-33 or RD-180 is exactly leadership, so much as catchup. --Damon |
#5
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so... the Ares-1 is DEAD
On Fri, 18 Dec 2009 02:18:57 -0800 (PST), gaetanomarano
wrote: -- early rumors from the Obama-Bolden meeting say that the Ares-1 is DEAD: -- http://blogs.sciencemag.org/sciencei...siveobama.html -- Assuming this report is true -- and I have learned to be cautious where rumors from the Obama camp are concerned -- that's disapointing. The Ares I's techincal problems weren't insurmountable; the Augustine panel acknowledged it was a good program and the question was not whether it COULD be built but SHOULD it be. (Personally, Ares I & V's resonance with the Saturn 1B and Saturn V gave the whole concept a retro-cool vibe I liked. And a successful Orion Ares 1 flight would send some individuals to eat at Kentuky Fried Crow, which would have been very satisfying. But I digress.) As to the international partnerships, I don't like the idea about being dependent on other countries for the landers and habitats. It only saves us money if they don't insist we send money to pay for it, as with the Russian components of the station. If we're going to bring other countries in, we should contribute our own hardware in addition to theirs and not slack off. And why fly all the way to the Moons of Mars but not land on Mars itself? That may be intruging to some eggheads, but does lack some common sense. Orbital mechanics dictatse how long you have to stay at Mars before beginning the return trip. If you're going to be stuck there anyway, why NOT land? "Oh, we're the first to fly to a point in space. Yeah. Why are we there again?" At least Mars is a place to go. Demos is like a rest stop on the way. The larger question is one of consistency across administrations; nothing can get done if we change gears every 4-8 years. Obama didn't continue with everything Bush started, although he kept the destination; will Obama's successor follow through on what he implements? I don't know how we can get that level of consistency, but that's what needed for anything to get done. |
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so... the Ares-1 is DEAD
On Fri, 18 Dec 2009 09:13:15 -0500, David Spain
wrote: ..... So exactly what is the state of RP-1 rocketry in the USA? Is it as dire as Bob Ford would have us believe? I'm sceptical of that statement. IIRC, the last major RP-1 engine built was the Saturn V's F1. Pre-Atlas V Atlases had kerosene engines, I think, as did the Delta 2. But the Delta 4 is all cryogenic. So are the Space Shuttle Main engines. It's been a while since the US buil a t new RP-1 engine, but given how many cryogenic engines have been used as first stages, why not stick with that? |
#7
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so... the Ares-1 is DEAD
On Dec 18, 4:49*am, Robert Clark wrote:
On Dec 18, 5:18*am, gaetanomarano wrote: -- early rumors from the Obama-Bolden meeting say that the Ares-1 is DEAD: --http://blogs.sciencemag.org/scienceinsider/2009/12/exclusiveobama.html -- as already said two weeks ago in my “Why the Ares-1 is already DEAD” article: --http://www.ghostnasa.com/posts2/058ares1dead.html -- Thanks for that info. Since we will be using a heavy lift launcher to be ready by 2018, this will be well within the time range to allow a new heavy thrust liquid fueled engine to be developed. As I argued before considering the development already done on the RS-84 heavy thrust kerosene engine, a prototype version could be ready by 2012 if development was restarted this year: RS-84 Engine.http://www.pwrengineering.com/datare...EngineOverview... This article from 2002 stated the development costs for two heavy thrust liquid fueled prototypes would cost $1.3 billion: TICKET TO RIDE. "Potential replacements for the Space Shuttle are taking shape as NASA struggles to finalise the requirements for a second-generation reusable launch vehicle." GRAHAM WARWICK / WASHINGTON DC 8-14 OCTOBER 2002 FLIGHT INTERNATIONAL "Engine development" "The success of our architecture depends on the success of NASA's engine development programme," says Young. The space agency is funding work on four main engine candidates, two hydrogen fueled and two kerosene-fueled. Pratt & Whitney and Aerojet are developing the Cobra, a 600,000 lb-thrust (2,670kN) hydrogen-fueled, staged-combustion, first and second-stage engine, while Boeing's Rocketdyne division is working on the 650,000 lb thrust-class RS-83. Rocketdyne is also pursuing the RS-84, a kerosene fueled, staged-combustion, first-stage engine generating 1,100,000 lb thrust, while TRW is developing the 1,000,000 lb thrust-class TR107. The plan is to test two prototype engines at a cost of $1.3 billion. "NASA will go for prototype engines that bracket the requirements of the three contractors," says Ford. He suggests the emphasis has shifted towards the kerosene-fuelled engines. "NASA wants to address kerosene first to reduce risk," he says. The USA has little experience with kerosene-burning rocket motors, having focused for decades on cryogenic engines."http://www.flightglobal.com/pdfarchive/view/2002/2002%20-%202996.html Then if NASA chose to develop one of these, such as the RS-84, to save costs, it conceivably might only cost $650 million (!) Then since the Air Force also wants a heavy thrust LOX/kero engine for its flyback booster program, the cost to NASA if the costs were shared might only be $325 million. NASA would only have to spend $108 million per year over 3 years to develop a reusable heavy thrust engine(!!) Also, the Air Force is already funding a heavy lift engine to power their proposed flyback boosters. However, since they're envisioning the heavy lift versions of such boosters to be used 1 to 2 decades down the road, they are taking a leisurely approach to the development of such an engine: Developers Seek to Speed Reusable Rocket Engines. Apr 10, 2008 By Guy Norris/Colorado Springs, Colo "Aerojet is meeting with the US Air Force in a bid to speed development of a US-designed, reusable hydrocarbon rocket engine that could play a key part in plans for an operationally responsive space vehicle. "Dubbed HC Boost, the technology development program is aimed at providing an improved, home-grown alternative to the Russian RD-180, the only other viable current-production hydrocarbon rocket engine. Unlike the RD-180, however, the US engine would be designed to be re- usable for up to 100 missions, have up to 15% better performance and would operate for up to 50 missions between engine overhauls. "More importantly perhaps, says the Air Force Research Laboratory (AFRL) which is leading the program, it would help pave the way for responsive access to space in terms of days and weeks, rather than months. The development would also, it says, free up U.S. dependency from the Energomash-produced RD-180, which is used to power the Atlas V launcher. "Aerojet is currently working on the HC Boost under a $109 million contract spread over almost nine years. The Sacramento, Calif.-based rocket specialist believes that more can be achieved by compressing the schedule and, at the same time, shifting the focus from a pure technology-driven research effort to a demonstration effort. "If we can do it in half the time they'd get a lot more for the money," says Aerojet president Scott Neish."http://www.aviationweek.com/aw/generic/story_channel.jsp?channel=busa... * Aerojet wants to accelerate this pace to perhaps 4 to 5 years and produce a prototype engine, undoubtedly also requiring increased funding. It's interesting this time frame would be about the same time it took to produce a working prototype of the Rocketdyne RS-84 heavy lift hydrocarbon engine if its development was restarted this year. Whether it's the Aerojet version or the Rocketdyne version, I definitely think that for low cost access to space, early development of such an engine should be made a priority. * Bob Clark H2O2 and propargyl alcohol, or H2O2 and cyclopropane. ~ BG |
#8
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so... the Ares-1 is DEAD
On Dec 20, 8:32*am, Michael Gallagher wrote:
On Fri, 18 Dec 2009 09:13:15 -0500, David Spain wrote: ..... *So exactly what is the state of RP-1 rocketry in the USA? Is it as dire as Bob Ford would have us believe? I'm sceptical of that statement. IIRC, the last major RP-1 engine built was the Saturn V's F1. Pre-Atlas V Atlases had kerosene engines, I think, as did the Delta 2. But the Delta 4 is all cryogenic. *So are the Space Shuttle Main engines. *It's been a while since the US buil a t new RP-1 engine, but given how many cryogenic engines have been used as first stages, why not stick with that? * Why not stick with H2O2 and propargyl alcohol, or H2O2 and cyclopropane? ~ BG |
#9
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so... the Ares-1 is DEAD
On Dec 20, 6:09*pm, Pat Flannery wrote:
Michael Gallagher wrote: IIRC, the last major RP-1 engine built was the Saturn V's F1. Pre-Atlas V Atlases had kerosene engines, I think, as did the Delta 2. But the Delta 4 is all cryogenic. *So are the Space Shuttle Main engines. *It's been a while since the US buil a t new RP-1 engine, but given how many cryogenic engines have been used as first stages, why not stick with that? Although the plumbing and turbopump design must be very complex, the tri-propellant RD-701 engine is interesting, particularly if you were trying to build something with the high isp needed to make a STTO vehicle practical:http://www.astronautix.com/engines/rd701.htm Pat Why not stick with H2O2 and propargyl alcohol, or H2O2 and cyclopropane? ~ BG |
#10
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so... the Ares-1 is DEAD
Michael Gallagher wrote:
IIRC, the last major RP-1 engine built was the Saturn V's F1. Pre-Atlas V Atlases had kerosene engines, I think, as did the Delta 2. But the Delta 4 is all cryogenic. So are the Space Shuttle Main engines. It's been a while since the US buil a t new RP-1 engine, but given how many cryogenic engines have been used as first stages, why not stick with that? Although the plumbing and turbopump design must be very complex, the tri-propellant RD-701 engine is interesting, particularly if you were trying to build something with the high isp needed to make a STTO vehicle practical: http://www.astronautix.com/engines/rd701.htm Pat |
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