Lockheed Martin AIM-260 Joint Advanced Tactical Missile (JATM)

TomcatViP said:
I understand it as having more grains per specific volume of powder (hence less void b/w the grains).
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Would that mean a change to the initial thrust grain or else some way of retarding the burn rate in the sustainer grain?
 
Typically the highly loaded grains are nearly or completely solid. The propellant is no more energetic than a standard propellant grain, in fact, you can produce a highly loaded grain with typical composite propellants. That being said, they are able to put a lot more propellant in a given volume. They are not an end burner design. There are a variety of methods used to control the burning surface area within the propellant grain to achieve the same type of initial performance as a typical center perforated or finocyl grain design. Given that there is significantly more propellant, there is significantly more performance.
 
Calphor said:
Typically the highly loaded grains are nearly or completely solid. The propellant is no more energetic than a standard propellant grain, in fact, you can produce a highly loaded grain with typical composite propellants. That being said, they are able to put a lot more propellant in a given volume. They are not an end burner design. There are a variety of methods used to control the burning surface area within the propellant grain to achieve the same type of initial performance as a typical center perforated or finocyl grain design. Given that there is significantly more propellant, there is significantly more performance.
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Any specifics? Hints?
 
JJPET said:
i wonder if this could mean a potential B variant of the aim260 already being developed. of course this assumes the aim260 is still using a amraam like propellent
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AIM-260 is an LM product, so 1) unrelated and 2) solid propellant motors have a huge number of applications across products and companies and 3) this seems to still be in the testing stage at this time.
 
Josh_TN said:
AIM-260 is an LM product, so 1) unrelated and 2) solid propellant motors have a huge number of applications across products and companies and 3) this seems to still be in the testing stage at this time.
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Hypothetically would it be trivial just replace the propellant in the current AIM260 if LM has an equivalent? And how does the technology ownership/IP work for these missile programs? I would hope that at this point we've learned enough lessons to avoid making upgrades in proprietary packages/variants And build things to rapidly integrate new tech in a piecemeal way as it becomes available.

Its been mentioned before that other AAMs are in development. This could certainly benefit those programs.
 
chinese sim on aim260. states its max effective range is 265km while launching at mach 1.2 at 10,000M.

i have some gripes for the sim. 1st it assumes it uses the PAC 3 altitude control and based on released images thats not the case making the missile slightly heavier. 2 it doesnt take into account any propellant advancements 3. no specialized lofting it seems. seems fairly accurate
 

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  • AIM-260空空导弹发展及性能分析.pdf
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Josh_TN said:
AIM-260 is an LM product, so 1) unrelated and 2) solid propellant motors have a huge number of applications across products and companies and 3) this seems to still be in the testing stage at this time.
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i know its a LM product but thats not to say others havent contributed to projects in a minor fashion such as ATK and Nammo making the motors for the amraam. if raytheon gets to a deal with LM and the USAF and USN then it could be a potential new variant again assuming the current aim260 is using a amraam energetic propellent
 
I suspect it uses some modestly more modern than AIM-120 SRM, but it probably does not use a still experimental fuel from a competing consortium.
 
NMaude said:
I second this also are there any websites which go into the technical details of a highly load grain rocket-motor is?
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I have been looking for public websites that have something close enough to describe the techniques, but have not been able to find anything. I’ll keep looking and if I find anything that is in the public domain I’ll post it here. I also checked DTIC to see if there was anything posted there as well. I do know that there have been several DoD contracts over the past few years that have been working on highly loaded grains. Ursa Major and Anduril have been public about it, but there is a mention of a similar program on Northrop Grumman’s website as well. I would assume that L3 Harris has a similar program as well.
 
Calphor said:
I have been looking for public websites that have something close enough to describe the techniques, but have not been able to find anything. I’ll keep looking and if I find anything that is in the public domain I’ll post it here. I also checked DTIC to see if there was anything posted there as well. I do know that there have been several DoD contracts over the past few years that have been working on highly loaded grains. Ursa Major and Anduril have been public about it, but there is a mention of a similar program on Northrop Grumman’s website as well. I would assume that L3 Harris has a similar program as well.
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If they've found a way to 3D print it, instead of using mandrels for the core, that would open up a lot of possibilities for controlling surface area geometry. But then you probably wouldn't be able to print/cast it in place so you'd have to load the billet of propellant into the case which would have its own issues.
 
According, to the article it's a 3 month delay but the shutdown is just two three weeks. Where's the extra time coming from?
 
Seragina said:
According, to the article it's a 3 month delay but the shutdown is just two three weeks. Where's the extra time coming from?
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id have to imagine from the restarting and shutting down process. when it restarts everyone has to come back and get into routine aswell as making sure the equipment and all is working + schedules need to be reworked so everything is organized
 
JJPET said:
id have to imagine from the restarting and shutting down process. when it restarts everyone has to come back and get into routine aswell as making sure the equipment and all is working + schedules need to be reworked so everything is organized
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But also, this is politics. They're laying the whole delay in a number of different programs at the door of the shutdown. At least some of those delays would have happened anyway, or are due to the delay in passing an NDAA, etc.
 
Good to see the JATM missile is not affected by the shutdown after all Forest Green, I was wondering about that.
 
Is there any news on battery technology for JATM?. Id assume current batteries in missiles are lithium ion and non solid state, could be wrong though. I know some newer EV's are using semi solid state batteries which are supposedly safer and are much more energy dense i think a mercedes reaching 700+ miles on a single charge compared to its original 4-500. I know the LRAAT was investing into battery technology and wouldn't surprise me if they had a very small and high energy dense battery solution.
 
Good news, Australia cleared for export of AIM-260 JATM
www.navalnews.com

USA Approves First AIM-260A JATM Export to Australia - Naval News

The Royal Australian Air Force will be the first foreign operator of the advanced AIM-260A JATM air-to-air missile according to U.S. sources speaking to Naval News on condition of anonymity. The sale is the latest in a series of close cooperation military deals between Australia and the United...
www.navalnews.com www.navalnews.com
 
joshjosh said:
Good news, Australia cleared for export of AIM-260 JATM
www.navalnews.com

USA Approves First AIM-260A JATM Export to Australia - Naval News

The Royal Australian Air Force will be the first foreign operator of the advanced AIM-260A JATM air-to-air missile according to U.S. sources speaking to Naval News on condition of anonymity. The sale is the latest in a series of close cooperation military deals between Australia and the United...
www.navalnews.com www.navalnews.com
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Interesting that the nations who are cleared for the AIM-120D are also cleared for the AIM-260A. Off the top of my head, that'd be Germany, Norway, Poland, the UK, Australia and Canada.
 

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