Current US hypersonic weapons projects. (General)

While it’s true that subsonic anti-ship missiles are usually smaller and can be carried in greater numbers, in practice, each aircraft pylon typically carries only one missile—regardless of speed class. This means a mixed loadout of both subsonic and supersonic missiles is not only possible but potentially optimal.

One of reasons we only see small load outs of air to surface weapons is because that is all that is possible: even Harpoon is heavy enough that F-18E/F is limited to four. The USN needs a sub 1000# weapon to unlock larger load outs. We definitely have seen aircraft loaded with 11 mk83s before, so these kind of load outs are possible. But not with current stand off weapons.
 
Your sarcasm aside, the big difference there is that those are developed items in production where as the magic of hypersonic flight in a 15’ package has yet to be demonstrated, and it would be very pricey. You can also buy several hundred LRASMs for a billion, which would almost double USN inventory. The USN cannot use HACM and has no JSM purchases, and the NSM purchases are surface launched, so you hyperbole is noted but not especially effective for your argument.

LRASM is still a program that consumed more $3+ Million per AUR. Imagine how many $150,000 - $450,000 Barracuda line or similar products you can buy for the annual LRASM budget. Also, zero out the LRASM/JASSM RDT&E budget and move that to Barracuda and that will result in even more missiles.

and the NSM purchases are surface launched, so you hyperbole is noted but not especially effective for your argument.

There is nothing unique about the NSM that makes other subsonic cruise missiles incapable of being surface launched. It is still a multi million dollar missile. A surface launched MACE would be quite a bit cheaper affording a much larger inventory. Your argument, if valid, needs to work both ways. It can't just be used to justify walking away from 'fast' weapons when in fact we pay millions of dollars per round for 'slow' weapons. There's opportunity cost to consider.

1744403922092.png
 
LRASM is still a program that consumed more $3+ Million per AUR. Imagine how many $150,000 - $450,000 Barracuda line or similar products you can buy for the annual LRASM budget. Also, zero out the LRASM/JASSM RDT&E budget and move that to Barracuda and that will result in even more missiles.

That was my point: cheap subsonics with low launch weight exist at low costs now. HALO is purely theoretical, and for its development costs, you could buy thousands of subsonic weapons off the shelf, assuming HALO development was even successful. And there is little precedent for hypersonic capabilities in that package.
 
That was my point: cheap subsonics with low launch weight exist at low costs now. HALO is purely theoretical, and for its development costs, you could buy thousands of subsonic weapons off the shelf, assuming HALO development was even successful. And there is little precedent for hypersonic capabilities in that package.
I agree. Which is why I mentioned the we should urgently be diverting funding from expensive subsonic missiles to cheap subsonic missiles because of exactly the reasons you’ve outlined. Time to stop wasting money on LRASM, JSM, TLAM etc.

My point is that there is a reason for why we buy more capable and exquisite weapons. Networked JASSMER at $1.5- $2 MM a pop is still going to be desirable vs Barracuda or alternative at $150,000-$200,000 a pop. Even though you can buy 10 of the latter for each JASSM. Doesn't mean we should not be buying cheap cruise missiles but just that the actual end user sees a value in exquisite capability. The same applies to hypersonic weapons. The end user also has some pretty sophisticated ways that it can model weapon effectiveness, cost per effect and adversary air and missile defenses. These weapon programs were not born in a vacuum. Something must have prompted the Navy to consider a future increment of its offensive surface attack weapon for the early 2030s even though it had the 'interim' capability in production. And clearly it didn't approach that analysis with the "my current baseline is too capable and expensive, and thus I should develop something less capable and cheaper".

An inventory of hundreds of hypersonic anti-ship weapons paired with thousands of subsonic anti ship weapons is going to be a lot more effective than an inventory of thousands of subsonic anti ship weapons alone..even if the latter is cheaper. Clearly, the Navy walked away from HALO because it couldn't manage the risk and it has competing priorities. But let's not leap to the conclusion that it was simply not worth it and the moment someone showed them the Barracuda 500 they decided to walk away in favor of a $150,000 per AUR promise and snazzy digital marketing. Programs like MACE, ACME, ERAM etc. existed and/were in the works in parallel to those looking to develop more exquisite capabilities. Whether that was more capable and expensive variants of existing subsonic weapons (JASSM-ER + , LRASM, BLock V TLAM, JSM etc) or supersonic (AARGM-ER, SiAW and future SoAW) and hypersonic (ARRW, HACM, HALO, LRHW etc) efforts.
 
Last edited:
I do not disagree in principle, but if anything was going to be cut, it is the hypothetical hypersonic, not the cheap cruise missiles everyone is offering. HALO is purely hypothetical; making a hypersonic in that size class has never been done by anyone.
 
I do not disagree in principle, but if anything was going to be cut, it is the hypothetical hypersonic, not the cheap cruise missiles everyone is offering. HALO is purely hypothetical; making a hypersonic in that size class has never been done by anyone.

It probably could have but the Navy probably also did not have a strict hypersonic requirement. But broadly I agree. The bomber and F-15EX (or land based FA-18) delivered hypersonic HACM would be a good capability to field. As well as integrating a seeker on LRHW. If indeed those investments are preserved then I think the Navy will do fine with LRASM inventories. But I'm highly skeptical of the "its really not that effective" argument that pops up after there is a setback instead of doing what we've historically done..gotten back to testing and fixing what goes wrong and fielding weapon systems. IF we hadn't followed that we wouldn't have had the JASSM to build the LRASM out of.
 
One thing I seeing people forgot bout the newer ASHMs like the TLAM V, LRASN, and NSM...

is that they are Stealth designs that fly extremely low.

Talking sub 100 foot here.

Unless you have AWACs types up, you are not even able to fucking see that till its 50 miles out.

Without stealth mind you, the radar Horizon max out at 50 60 miles for ships mask sets, for the big phase arrays like tge SPY1 that down to 30 40 since they are lower.

The Stealth likely makes it a out right PITA to detect up to 10 miles away. Inside that it slowly becames easier til its visible in the 5 miles band where ThermoOptics can detect and track it.

That cuts out most of the weapons can bring to bear and at the Tomahawks speed of 550 mph?

You got less then 30 seconds to kill it from a 5 mile detection, 1 minute from 10 and 2 for 20.


That isnt a whole lot of time even with computers.


Throw in numbers, which we do need far FAR more of...

Well 8 to 16 missiles popping up at at 10 miles is a scary deal.

Compare to hypersonic cruisers that need to be above 10k to work, and you can see that from well over 200 miles away via radar. Even at mach 5, or bout 1 mile a second that gives you well over 3 minutes to set up a shot kill it.

And unlike Low flyers that can get lost in the clutter and make identification a slower process.

You will be able to instantly ID a hypersonic for what it is. You can not hide that. At all.

That is very likely the DOD thought process on the whole hypersonic deal.

There are supersonic sea skimming AShMs, why shouldn't hypersonic AShMs have a similar capability? The high altitude during the terminal phase should only really be an issue with boost glide vehicles and ballistic missiles. But something moving at, excuse my language here, Mach-Fuck barely above the sea level seems incredibly scary and difficult to deal with. And that's generally what most aim towards with their hypersonic "ship-killers".
 
Maybe the US DoD should dust off the old ASALM plans, give them a 21st century update, test the updated design and put it into production if it works, that would give the US a supersonic AShM.
 
Are there any US hypersonic air to air missiles in development? Could they be the AIM-174b and/or AIM-260? The Chinese allegedly tested one with a 600 plus mile range, designed to counter B-21. Are the Russians working on any?
 
Last edited:
Also, how does LRASM compare to barracuda? Perhaps 2 barracudas would be cheaper then 1 lrasm, but have the same or more effectivness. Does anyone have any information on the rcs of lrasm and barracuda?
 
Are there any US hypersonic air to air missiles in development? Could they be the AIM-174b and/or AIM-260? The Chinese allegedly tested one with a 600 plus mile range, designed to counter B-21. Are the Russians working on any?
I think the Phoenix actually surpassed Mach 5? Russia uses the R-37M which also reaches hypersonic speeds. Unsure what speeds the AIM-260 reaches, but probably between Mach 3 and Mach 5.
 
I think the Phoenix actually surpassed Mach 5? Russia uses the R-37M which also reaches hypersonic speeds. Unsure what speeds the AIM-260 reaches, but probably between Mach 3 and Mach 5.
IMHO, the AIM-260 will be hypersonic. But have any of you heard any rumblings that would confirm or deny this?
 
I recall reading somewhere years ago (It was before the Phoenix was retired) that the AIM-54C had a burnout speed of Mach 5.5.
Indeed. It stands to reason that US air to air rocket motor technology has, since then, produced engines that are a lot more powerful and smaller.
 
Indeed. It stands to reason that US air to air rocket motor technology has, since then, produced engines that are a lot more powerful and smaller.

I suspect that the Phoenix only reached its' max speed in high altitude, long range shots.
 
I suspect that the Phoenix only reached its' max speed in high altitude, long range shots.
I agree. It employed somewhat of a high altitude (maybe around 100k feet) flight profile, where it would burn out and glide, using the lift generated by its relatively big strakes. Essentially, it lofted for the majority of its time in flight. The same would probably be true for aim-260, but it does not really have any strakes. Thus, the motor is probably more powerful, while also being smaller. AIM-260 would also probably be able to reignite its motor, for improved terminal manuevering.
 
Last edited:
It probably could have but the Navy probably also did not have a strict hypersonic requirement. But broadly I agree. The bomber and F-15EX (or land based FA-18) delivered hypersonic HACM would be a good capability to field. As well as integrating a seeker on LRHW. If indeed those investments are preserved then I think the Navy will do fine with LRASM inventories. But I'm highly skeptical of the "its really not that effective" argument that pops up after there is a setback instead of doing what we've historically done..gotten back to testing and fixing what goes wrong and fielding weapon systems. IF we hadn't followed that we wouldn't have had the JASSM to build the LRASM out of.

I was not arguing that hypersonics were ineffective, but someone else here was suggesting they would be invulnerable.

I think it would definitely have uses, but it would have a high cost of development in both money and time, and a high cost of purchase. A 500 mile subsonic is something you can buy off the shelf now I think that’s why HALO died.
 
A 500 mile subsonic is something you can buy off the shelf now I think that’s why HALO died.
You could have bought a 500 mile subsonic even before HALO was chosen as the increment 2 solutions following completion of a formal AoA for the program. In fact, the increment 1 it was to essentially replace (in Navy procurement budgets) was a subsonic weapon. Most articles that talk about HALO cancelation refer to technical challenges and cost. Not the fact that the Navy finally found that that 500 nmi subsonic missiles are a thing.
 
Are there any US hypersonic air to air missiles in development? Could they be the AIM-174b and/or AIM-260? The Chinese allegedly tested one with a 600 plus mile range, designed to counter B-21. Are the Russians working on any?

Depends how you define hypersonic. Most any A2A missiles will break through Mach 5 at motor burn out if launched at speed and altitude. If you mean sustained Mach 5, probably no.
 
You could have bought a 500 mile subsonic even before HALO was chosen as the increment 2 solutions following completion of a formal AoA for the program. In fact, the increment 1 it was to essentially replace (in Navy procurement budgets) was a subsonic weapon. Most articles that talk about HALO cancelation refer to technical challenges and cost. Not the fact that the Navy finally found that that 500 nmi subsonic missiles are a thing.

But the costs have collapsed since LRASM was created. And LRASM was never well optimized for the anti shipping mission.
 
But the costs have collapsed since LRASM was created. And LRASM was never well optimized for the anti shipping mission.

Could be. Hoping they collapse further and we cancel LRASM and JASSM all together. We need Arsenal 1, 2 and 3 churning out a few million of those bad boys a year.
 
Maybe your right. But AIM-174 probably cannot be carried internally on FA-XX. Thus, it is not very stealthy. Let us propose that it has a 350 mile range when launched from an aircraft. By the time it would reach a target about that distance out, provided that the enemy plane was headed towards the other at supersonic speeds, the launch aircraft would probably be in range of an internally carried air-to-air missile that would be similar to AIM-260 (perhaps PL-17). Assuming that the above is true, would it not be more logical to then only go with the AIM-260?
 
For anyone interested, here is the raw statement from a U.S. Navy spokesperson familiar with the matter. This was the same statement cited in my story.

I originally found out about a possible hold on the HALO missile from a statement made by a senior Northrop Grumman executive to me in an interview at Sea Air Space 2025. They said NGC developed a propulsion system in under 12 months for HALO which was "now on hold". A follow-up with NAVAIR yielded this.

"The Navy cancelled the solicitation for the Hypersonic Air-Launched Offensive Anti-Surface Warfare (HALO) Engineering and Manufacturing Development (EMD) effort in fall 2024 due to budgetary constraints that prevent fielding new capability within the planned delivery schedule. The decision was made after the Navy conducted a careful analysis, looking at cost trends and program performance across the munitions industrial base compared to the Navy’s priorities and existing fiscal commitments."

"We are working closely with our resource sponsors to revalidate the requirements, with an emphasis on affordability."

"The Navy is committed to its investment in Long Range Fires to meet National Defense objectives, with priority emphasis on fielding continued capability improvements to the AGM-158C Long Range Anti-Ship Missile (LRASM), currently fielded on the Navy F/A-18 and Air Force B-1B aircraft. Improvements include hardware and software upgrades that will enhance targeting capabilities.“

Working on figuring out what the Navy's new approach is for 'affordability' in OASuW Increment 2. I'll update here if I find anything.
 
Number was from commander in Chief Syrskyi, other magazine just report it
Those stats are just weird and probably affected greatly by where the actual targets were relative to air defences, e.g. the shootdown rate for Kinzhal (25%) is higher than Iskanders and KN-23s (4.5%). And the shootdown rate for Zircons - the unstoppable Mach 10 missile - is higher still (33%) and yet the intercept rate on the dog-turd-supermarket-killing Kh-22/32 (Mach 3.5) is only 0.55%. I'm discounting S-300/400s because it's unclear whether they were missed or missed themselves given performance.

Based on that it seems like the Zircon and Kinzhal were a waste of time, or is it just that a greater % were fired at Kyiv, which is relatively well guarded? Note also that Ukraine ran out of interceptors at one point too.

 
Last edited:
Those stats are just weird and probably affected greatly by where the actual targets were relative to air defences, e.g. the shootdown rate for Kinzhal (25%) is higher than Iskanders and KN-23s (4.5%). And the shootdown rate for Zircons - the unstoppable Mach 10 missile - is higher still (33%) and yet the intercept rate on the dog-turd-supermarket-killing Kh-22/32 (Mach 3.5) is only 0.55%. I'm discounting S-300/400s because it's unclear whether they were missed or missed themselves given performance.

Based on that it seems like the Zircon and Kinzhal were a waste of time, or is it just that a greater % were fired at Kyiv, which is relatively well guarded? Note also that Ukraine ran out of interceptors at one point too.

Due to their status, these hypersonic missile likely get engaged by much greater quantity of interceptors as opposed to common supersonic missile
IMG_8558.jpeg
 
Those stats are just weird and probably affected greatly by where the actual targets were relative to air defences, e.g. the shootdown rate for Kinzhal (25%) is higher than Iskanders and KN-23s (4.5%). And the shootdown rate for Zircons - the unstoppable Mach 10 missile - is higher still (33%) and yet the intercept rate on the dog-turd-supermarket-killing Kh-22/32 (Mach 3.5) is only 0.55%. I'm discounting S-300/400s because it's unclear whether they were missed or missed themselves given performance.

Based on that it seems like the Zircon and Kinzhal were a waste of time, or is it just that a greater % were fired at Kyiv, which is relatively well guarded? Note also that Ukraine ran out of interceptors at one point too.


Going from memory, the Kinzhal incidents were usually directed at Kiev. But more broadly yes, what was fired where will make a huge difference - Patriot has a decent chance against very high speed targets if they are fired directly towards the battery at some next to it or behind it. So a complete analysis of effectiveness of various offensive missile types would require a knowledge of the entire Ukrainian air defense network at the time of engagement to really get an apples to apples comparison.
 
For anyone interested, here is the raw statement from a U.S. Navy spokesperson familiar with the matter. This was the same statement cited in my story.

I originally found out about a possible hold on the HALO missile from a statement made by a senior Northrop Grumman executive to me in an interview at Sea Air Space 2025. They said NGC developed a propulsion system in under 12 months for HALO which was "now on hold". A follow-up with NAVAIR yielded this.







Working on figuring out what the Navy's new approach is for 'affordability' in OASuW Increment 2. I'll update here if I find anything.

Thanks for heads up. Wasn’t NG eliminated from HALO in the first downselect though? I thought RTX won it.
 
Working on figuring out what the Navy's new approach is for 'affordability' in OASuW Increment 2. I'll update here if I find anything.
The Navy has an effort looking at low cost high speed weapons. They recently published a solicitation asking industry for it. But as some here have opined, the Navy now having apparently realized that there are subsonic missiles out there, may walk back those requirements as well.
 
Last edited:
There are supersonic sea skimming AShMs, why shouldn't hypersonic AShMs have a similar capability? The high altitude during the terminal phase should only really be an issue with boost glide vehicles and ballistic missiles. But something moving at, excuse my language here, Mach-Fuck barely above the sea level seems incredibly scary and difficult to deal with. And that's generally what most aim towards with their hypersonic "ship-killers".

Air resistance slows everything down at sea level. Mach 2.5 is the fastest figure I’ve seen for a sea skimmer. I doubt Brahmos or Zircon are much faster at low altitude; hypersonic speeds are pretty much by definition high altitude for air breathers. Even ICBM RVs massively slow down in the thick air of the lower atmosphere. I suspect every hypersonic glider slows down to supersonic speeds on its dive to the target.
 
Due to their status, these hypersonic missile likely get engaged by much greater quantity of interceptors as opposed to common supersonic missile
View attachment 766493
I think it's more to do with the fact that Zircons have been used pretty much exclusively on Kyiv. The quote also makes no sense as regards 32 launchers per battery, last I checked it was 6-8, unless it means 32 missiles, but that would suggest they're using PAC-2s, rather than more suitable PAC-3s (8x16 - old non-MSE PAC-3s note).

What was the source?

Air resistance slows everything down at sea level. Mach 2.5 is the fastest figure I’ve seen for a sea skimmer. I doubt Brahmos or Zircon are much faster at low altitude; hypersonic speeds are pretty much by definition high altitude for air breathers. Even ICBM RVs massively slow down in the thick air of the lower atmosphere. I suspect every hypersonic glider slows down to supersonic speeds on its dive to the target.
There's nothing to suggest Zircon even has a low altitude capability, unless we're talking about just before impact. Can it even operate in ramjet rather than scramjet mode?

Going from memory, the Kinzhal incidents were usually directed at Kiev. But more broadly yes, what was fired where will make a huge difference - Patriot has a decent chance against very high speed targets if they are fired directly towards the battery at some next to it or behind it. So a complete analysis of effectiveness of various offensive missile types would require a knowledge of the entire Ukrainian air defense network at the time of engagement to really get an apples to apples comparison.
Which is why a better analysis would focus solely on Kyiv, since we know there is definitely a Patriot network deployed there... somewhere. Other places may well only be defended by fresh air. The stats should also subtract failures of the offensive missile, since if a Kh-22 or Kh-47 crashes in a field it's not really within the Patriot's remit to intercept it, nor is it necessary.
 
Last edited:
Thanks for heads up. Wasn’t NG eliminated from HALO in the first downselect though? I thought RTX won it.
Yes they were. They also mentioned having developed a highly loaded grain motor for someone's HALO bid... which makes me think there's a lot more at play here than just a missile in the OASuW Increment 2 program.
 
Yes they were. They also mentioned having developed a highly loaded grain motor for someone's HALO bid... which makes me think there's a lot more at play here than just a missile in the OASuW Increment 2 program.

Orbital ATK might have been subcontracted. I think NG is part of the RTX submission for HACM as well.
 
Air resistance slows everything down at sea level. Mach 2.5 is the fastest figure I’ve seen for a sea skimmer. I doubt Brahmos or Zircon are much faster at low altitude; hypersonic speeds are pretty much by definition high altitude for air breathers. Even ICBM RVs massively slow down in the thick air of the lower atmosphere. I suspect every hypersonic glider slows down to supersonic speeds on its dive to the target.
Is it conceivable that a hypersonic would only go down to sea-skimming mode when it was only 50 or so miles from the target?
 
Also, hypersonics may be detected, but the enemy might not have enough time to act on them, at least reliably. Perhaps hypersonics could be used somewhat as decoys, while cruise missiles would do most of the actual attack,
 

Similar threads

Back
Top Bottom