America already has hypersonic missiles on the way. DARPA has just told industry that “on the way” is not good enough.

On 7 August 2026, the Pentagon’s far-out research agency released a notice for a possible new program — the Next-Generation Hypersonic Cruise Missile — asking industry for ideas that would leapfrog, not inch past, the weapons currently entering production. The word DARPA keeps using is not “improve.” It is “revolutionary.”

Incremental isn’t enough

DARPA is blunt about the state of the art. Past demonstrators, it says, proved the physics but delivered only “predictable, incremental gains” while staying expensive and hard to mass-produce. This time the agency wants a “quantum leap” driven by “high-risk, high-reward technologies” — without saying which ones.

Air-breathing vs boost-glide

The missile DARPA wants is a scramjet weapon: it breathes air to sustain flight above Mach 5, unlike “boost-glide” arms that ride a rocket up and then coast to the target. Air-breathers are more efficient and can be smaller, which means more aircraft can carry them — DARPA even wants variants ranging from ones a fighter can hang under a wing to pallet-dropped and bomber-only types.

From the X-51 to what comes next

None of this is starting from zero. DARPA’s X-51 Waverider proved sustained scramjet flight over a decade ago, slung under the wing of a B-52; its lessons fed the F-15E Strike Eagle-launched HACM now nearing production. The new notice is DARPA asking what the generation after that should look like — and betting that the honest answer is nothing like today’s.

Sources: DARPA solicitation notice (7 Aug 2026, via SAM.gov); Air & Space Forces Magazine. Program figures per USAF 2027 budget documents.