Hermeus successfully flew its latest Quarterhorse aircraft, marking the company’s second first flight in less than a year. The flight kicks off a test campaign that will see the unmanned aircraft reach supersonic speeds. Roughly the size of an F-16 and powered by a Pratt & Whitney F100 engine (Pratt & Whitney is an RTX …
In May, 2025, hypersonic plane developer Hermeus flew its Quarterhorse Mk 1 prototype. It flew at Edwards Air Force Base. They are showing rapid, iterative development. They got a flying prototype in 20 months. It was 204 days from the completed design to the flying prototype. The Quarterhouse Mk2 that will fly at Mach 3 …
Venus Aerospace and Hermeus are the modern day companies that are truly using the small and effective engineering team approaches and methods of the Clarence “Kelly” Johnson led (1943-1975) Lockheed Skunkworks. Here is analysis of their technology and how they will crack the three speed zone problem that has stopped researchers for decades. Going from …
In 2024, Hermeus built their first aircraft and completed its ground test campaign. They opened a new test facility – set to become a national asset for high-Mach and hypersonic propulsion testing, and quickly brought it online with F100 engine tests. They expanded ther Los Angeles footprint, grew the team across both coasts, and increased …
Hermeus is breaking ground on a new engine and flight test facility HEAT will accelerate US hypersonic development, offering increased testing cadence for not only Hermeus, but the DoD and larger defense industrial base. Hermeus has selected Cecil Airport in Jacksonville, Florida for its hypersonic engine test facility. Named HEAT (High Enthalpy Air-Breathing Test Facility), …
Hypersonic plane startup, Hermeus, plans to make a plane faster than the SR-71 blackbird spy plane. the SR-71 could reach mach 3.3 and fly at 85000 to 100,000 feet in altitude. Quarterhorse Mk 2 will fly with this precooler-F100 engine combination and be capable of hitting speeds greater than Mach 2.5. The entire Chimera engine, …
The startup Hermeus is rapidly developing a hypersonic plane. They have begun testing their proprietary precooler technology with the Pratt & Whitney F100 engine. This video highlights some of our favorite camera angles from testing. What’s a precooler and why are they testing it? The Hermeus precooler increases the maximum speed of the turbine engine …
Hermeus completed testing of their full system hypersonic ground Mk0 test plane. It is a complete system made in 6 months and tested in 37 days. The fully-integrated vehicle, Quarterhorse Mk 0 is a non-flying prototype acted as a ‘dynamic iron bird’ for the company by validating all major aircraft subsystems in a real-world environment. …