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#1 2007-09-06 20:10:00
- gaetanomarano
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- From: Italy
- Registered: 2006-05-06
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Re: The solution of all Ares-I problems: the "J-2Y" engine >>>
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I think that a possible solution for the (now definitive, but still underpowered) Ares-I problems could be a "resized J-2X" as explained in my new article:
http://www.gaetanomarano.it/articles/03 … ngine.html
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#2 2007-09-06 22:43:45
- cIclops
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- Registered: 2005-06-16
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Re: The solution of all Ares-I problems: the "J-2Y" engine >>>
According to NASA the Ares I is not "underpowered" so there is no need to develop an engine that has so much more thrust. Efficiency is more important for an upper stage, improvements in Isp (currently 448 secs) are always helpful. No doubt P&W will be working hard to make the J-2X as efficient and reliable as possible.
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#3 2007-09-07 07:03:14
- SpaceNut
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Re: The solution of all Ares-I problems: the "J-2Y" engine >>>
There were lots of engine projects going before the Columbia accident and those were all canned. Some of them could have been what we could have used today in the building of the visions flight of ships. These were under the OSP and SLI programs.
Such things as the RS-84 kerosene and the RS-83 Hydrogen buring were amoung them.
The RS-83 http://en.wikipedia.org/wiki/RS-83 was being design as a replacement reuseable beyound shuttle but the work could have been transferred into the ARES V with more power than the RS-68's for even greater payloads to orbit.
So while you may have what you think is a solution NASA will not care, the decision has been made until such time that it will not work and then NASA will move on....
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#4 2007-09-07 07:18:20
- gaetanomarano
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Re: The solution of all Ares-I problems: the "J-2Y" engine >>>
RS-84 kerosene and the RS-83 Hydrogen
there is a BIG difference between these abandoned projects and a new engine that actually IS under devlopment and FUNDED with $1.2 billion
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#5 2007-09-07 07:20:04
- gaetanomarano
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Re: The solution of all Ares-I problems: the "J-2Y" engine >>>
Ares I is not "underpowered"
ok, but if they will need more power, the J-2Y could be a simple and fast solution
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#6 2007-09-07 11:38:16
- gaetanomarano
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Re: The solution of all Ares-I problems: the "J-2Y" engine >>>
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my J-2Y could add more power to the AresV that, in its current version, can lift 13 mT less payload than planned/necessary
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#7 2007-09-07 11:55:38
- cIclops
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Re: The solution of all Ares-I problems: the "J-2Y" engine >>>
The RS-83 http://en.wikipedia.org/wiki/RS-83 was being design as a replacement reuseable beyound shuttle but the work could have been transferred into the ARES V with more power than the RS-68's for even greater payloads to orbit.
The RS-83 design has a better Isp and less weight than the RS-68B but it also has less thrust. However it's biggest disadvantage is that it doesn't exist. The RS-68B is a modification of the RS-68 that is already in production and is flight proven on the Delta IV launchers.
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#8 2007-09-07 20:43:55
- SpaceNut
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Re: The solution of all Ares-I problems: the "J-2Y" engine >>>
I agree that it does not since it was canned back at the end of 2004 IIRC but the point is Nasa turns around on a dime without thinking through all of the issues.
I think first articles would have been made and since the RS68 is being rehashed to better the risk parameters for being a manned use it would have made sense to have continued with the project...
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#9 2007-09-07 22:35:50
- Michael Bloxham
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- From: Auckland, New Zealand
- Registered: 2002-03-31
- Posts: 426
Re: The solution of all Ares-I problems: the "J-2Y" engine >>>
Gaetanomarano brings up an interesting point about the potential to simply resize the engine for more thrust...
Obviously, for engines already in production, the cost would be significant due to retooling. But, as far as I know, production of the new J2 engine hasn't yet started, so I think he has a valid point.
- Mike, Member of the [b][url=http://cleanslate.editboard.com]Clean Slate Society[/url][/b]
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