Didn't a US test recently achieve Mach 15 or over? And one of the programs aims for >Mach 20 top speeds.
Doesn't AGM-183 fall under the ARRW program umbrella?
I'm not aware of anything recent in the US flying Mach 15. Maybe they tested one of the missiles designed to be used by the USN and US Army? (Boost glider based on the ancient SWERVE test vehicle. More a maneuvering RV than a true glider though.)
AGM-183 and ARRW are the same vehicle. Apparently the documentation is a bit deceptive. There is money allocated for one more test and money for follow on development allocated somewhere else.
"This is not the correct take (I've pointed it out to Steve in comments below the tweet). The RDT&E or prototyping funding for ARRW is going away in FY-23 because it is expected to end the development and prototyping phase of the program. This would have happened in FY-22 had there been no delays. The AF has opened up an ARRRW line in its procurement budget. This currently includes $40 MM funding for tooling and AUR production but that is apparently being diverted to cover the shortfalls on the testing side to make up for the delays. However, if the program is successful over the next 12 months, the AF can request reprogramming, and the Congress can add dollars into this procurement account to avoid a gap between FY-23 RDT&E completion, and additional FY-24 funding.
All in, the AF has build a mechanism to finish ARRW development and testing, and to begin buying the missile once it is ready. Whether they do this, and at what pace, will be highly dependent on how the program is executed by the armament directorate and Lockheed Martin."
I recall the US expressing doubt in how effective hypersonic weapons are due to exorbitant costs. They haven't planned on cancelling projects due to costs but it's an interesting comment on this class of weapons. Seemingly suggesting they haven't worked out how to control the costs from getting crazy and making the weapon essentially near useless except as a doomsday nuclear delivery system which I recall being something one of the articles claimed is how they expect China to operate hypersonics - as nuclear delivery only because it is simply too expensive to use conventionally.
There is also the time to target aspect. If a target of opportunity is spotted that needs to be taken out ASAP a high speed weapon might be the only way to hit it before it moves again. Hypersonics (and good C3/I) is the best way to do that. I'd wondered about the Russian use of Kinzhal and Bastion in Ukraine. Maybe they were fleeting targets.
I'd argue it's because these weapons are not exactly anywhere near as useful to the US as it is to China. A result of the military postures and doctrine of the two with China being in a defensive position and requiring A2AD, also making expensive forms of A2AD worthwhile. Meanwhile the US wants power projection and hypersonics aren't exactly any more effective than any other PGM. Their aim is control of air and sea so that airborne assets can use PGMs - considerably cheaper and easier to make than hypersonics. However it's very difficult to use a PGM to sink a carrier and even a hypersonic at 10x the cost or 100x the cost of a PGM is well worth it if it is able to perform this role.
So their "lack of trying" is more down to these reasons.
It's not lack of trying. It's lack of commitment. Too often the US quits at the first sign of difficulty. But yeah, there hasn't really been a pressing need, I'll give you that.
And come on, yeah US funding isn't infinite but it is as close to being effectively unlimited as any other. Over 4% of GDP (the largest GDP sum mind you) compared to China's not even 2% GDP spent on military. Okay lots of bases to maintain and higher pay for pretty much everyone. That's still at least similar available funding. It's just they don't see anywhere near as much value as China does and this is down to the military posture of the two.
I'd argue the US, effectively, has a smaller budget than China all things considered. Everything on the list costs less in China.