DARPA's hypersonic scramjet achieves successful flight
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Re: DARPA's hypersonic scramjet achieves successful flight
#2DARPA has such a list of impressive, world wide useful technologies that wouldn't have been able to be created without funding from the government at the time given the time and money and at time, unlikeliness to be successful [0].
It really sucks that there's a 'D' for 'Defense' at the front of the acronym. Their website says they're "creating breakthrough technologies and capabilities for national security". Horrible that national security is the reason for this, when it should be human progress.
[0] https://www.itpro.com/technology/34730/10-amazing-darpa-inve... [1] https://www.darpa.mil/
Re: DARPA's hypersonic scramjet achieves successful flight
#3Mach 5 is a bit faster than the Virgin Galactic flight (Mach 3). The folks on Inspiration reached ~ Mach 23.
Re: DARPA's hypersonic scramjet achieves successful flight
#4I'm curious about the PR strategies at play when governments either saber-rattle or keep secrets.
Announcing breakthrough, surprising even, HAWC tech seems to clue in opponents about what sorts of countermeasures they'd want to start developing.
By contrast, the US has held the high-altitude Aurora/SR-72/whatever tech very close to the vest for decades, when it's pretty much obvious that a new generation of high altitude replacements for U-2/SR-71/etc have been in the works or operational for a long time.
Could this be economic trolling/baiting like what in the 80's, (in part?) contributed to the USSR bankrupting itself trying to keep up with cold war tech?
Re: DARPA's hypersonic scramjet achieves successful flight
#5I'm curious about the PR strategies at play when governments either saber-rattle or keep secrets. Announcing breakthrough, surprising even, HAWC tech seems to clue in opponents about what sorts of countermeasures they'd want to start developing. By contrast, the US has held the high-altitude Aurora/SR-72/whatever tech very close to the vest for decades, when it's pretty much obvious that a new generation of high alti…
> contributed to the USSR bankrupting itself trying to keep up with cold war tech?
Source?
Re: DARPA's hypersonic scramjet achieves successful flight
#6US's answer to Russia's Zircon missile?
https://www.military.com/equipment/weapons/why-russias-hyper...
> U.S. Aegis missile interceptor systems require 8-10 seconds of reaction time to intercept incoming attacks. In those 8-10 seconds, the Russian Zircon missiles will already have traveled 20 kilometers, and the interceptor missiles do not fly fast enough to catch up.
Re: DARPA's hypersonic scramjet achieves successful flight
#7Mach 5 is a bit faster than the Virgin Galactic flight (Mach 3). The folks on Inspiration reached ~ Mach 23.
> Mach 5 is a bit faster than the Virgin Galactic flight (Mach 3)
Mach 5 is a lot faster than Mach 3, not only in relative terms (it's 40% faster) but in absolute terms as well: around mach 5 is a regime change where the physics of flight get altered and interference effects become extremely significant, small changes to any surface component will have major impact on airflow, and thus will affect any component downstream from them.
This makes air-breathing hypersonic devices a much bigger challenge than air-breathing supersonic ones.
Re: DARPA's hypersonic scramjet achieves successful flight
#8DARPA has such a list of impressive, world wide useful technologies that wouldn't have been able to be created without funding from the government at the time given the time and money and at time, unlikeliness to be successful [0]. It really sucks that there's a 'D' for 'Defense' at the front of the acronym. Their website says they're "creating breakthrough technologies and capabilities for national security". Horrib…
Many humans are quite aggressive. Pacifists are easily defeated by force.
How can you have progress without security?
Re: DARPA's hypersonic scramjet achieves successful flight
#9US's answer to Russia's Zircon missile? https://www.military.com/equipment/weapons/why-russias-hyper... > U.S. Aegis missile interceptor systems require 8-10 seconds of reaction time to intercept incoming attacks. In those 8-10 seconds, the Russian Zircon missiles will already have traveled 20 kilometers, and the interceptor missiles do not fly fast enough to catch up.
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Re: DARPA's hypersonic scramjet achieves successful flight
#10I'm curious about the PR strategies at play when governments either saber-rattle or keep secrets. Announcing breakthrough, surprising even, HAWC tech seems to clue in opponents about what sorts of countermeasures they'd want to start developing. By contrast, the US has held the high-altitude Aurora/SR-72/whatever tech very close to the vest for decades, when it's pretty much obvious that a new generation of high alti…
Given the fact that other governments are fielding hypersonic scramjet missiles, I don't think so.