Hypersonic Aircraft, DART AE 001

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Supposedly, testing is happening this year. It's not clear though is they are talking about Summer in Australia (Jan-Feb (beginning of 2024) or Dec (end of 2024)), or in the US (June - Aug).

From 2023 - New Pentagon-funded hypersonic test vehicle could fly in summer 2024
https://www.space.com/new-hypersonic-test-vehicle-2024-flight-pentagon-funding

DART AE is a 9.8-foot-long (3 meters), 660-pound (300 kilograms) scramjet-powered technology demonstrator that can reach speeds of up to Mach 7, according to the company’s website. (Mach 1 is the speed of sound, which is about 767 mph, or 1,235 kph, at sea level. "Hypersonic" generally refers to flight that achieves speeds of Mach 5 or higher.)

https://www.hypersonix.com/
https://www.hypersonix.com/case-studies/kratos
https://www.hypersonix.com/case-studies/diu
 
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Astronuc said:
Supposedly, testing is happening this year. It's not clear though is they are talking about Summer in Australia (Jan-Feb (beginning of 2024) or Dec (end of 2024)), or in the US (June - Aug).
https://www.hypersonix.com/technology/dart
The prototype test launch, powered by a guided Rocket Lab rocket, is scheduled for Quarter 1, 2025.
 
I think they mean towing it to altitude like a glider and then releasing it to fly freely.

It allows for a larger aircraft than dropping it from another plane like Stratolaunch and Roc, but it’s riskier.

Edit: yep, that’s exactly what they’re aiming for:
Flight profile diagram of a glider towed by a jet to 40,000 ft, released, then igniting a rocket to pull up and release a small launch vehicle at 48,000 ft, which stages upward and deploys a satellite to orbit at about 17,000 mph.