Hermeus

Short description: American aerospace manufacturer

Hermeus

Type| Private
Industry| Aerospace
Founded| 2018
Founder| AJ Piplica (CEO)
Skyler Shuford (COO)
Glenn Case (CTO)
Mike Smayda (CPO)
Headquarters| Atlanta, GA

Number of locations

| 2
Website| hermeus.com

Hermeus Corporation is an American startup company from Atlanta, Georgia focused on the development of commercial hypersonic aircraft. Their mission is to radically accelerate air travel through the development of multiple dual-use Mach 5 capable aircraft.[1]

## Contents

* 1 History
* 2 Products
* 2.1 Chimera engine
* 2.2 Quarterhorse
* 2.3 Darkhorse
* 2.4 Halcyon
* 3 See also
* 4 References
* 5 External links

## History

The company was founded in 2018[2] and received an initial round of funding led by Khosla Ventures.[3] In March 2021, the company signed a Space Act Agreement with NASA for research and development of high-speed aircraft.[4] Later in 2021, the company signed a contract with the United States Air Force, securing full funding for development of its Quarterhorse hypersonic jet.[5]

In March 2022, Hermeus raised a $100 million Series B led by Sam Altman. The capital will be used to complete development of Hermeus' first aircraft, Quarterhorse, begin flight services operations, and accelerate development of Darkhorse – an uncrewed aircraft capable of sustained hypersonic flight. The lessons learned from development, flight test, airworthiness, and operations of Darkhorse will inform Hermeus' approach to developing its commercial passenger aircraft, Halcyon.[6]

On November 17, 2022, Hermeus' Chimera turboramjet engine performed a successful transition from turbojet mode to ramjet mode in a simulated hypersonic flight.[7] According to Hermeus, this test is considered notable for demonstrating the speed and efficiency with which the Chimera engine was developed (21 months with a budget of $18 million).

## Products

### Chimera engine

Chimera is the turbine-based combined cycle (TBCC) engine powering Quarterhorse.[8] At low speeds Chimera operates in turbojet mode. As temperature and the speed of the incoming air increases, Chimera uses a pre-cooler to reduce the temperature of the air coming into the turbojet, allowing the engine to draw out additional performance before switching to ramjet mode.[9] The ability to transition between these two modes allows Quarterhorse to take off from a regular runway and then accelerate up to high-Mach speeds.[7][10]

On November 17, 2022, Hermeus announced that it had demonstrated transition during testing at Notre Dame Turbomachinery Lab. Hermeus designed, built, and tested Chimera in 21 months for $18 million.[7]

### Quarterhorse

Quarterhorse prototype

Hermeus' first aircraft will be Quarterhorse, a remotely piloted high-speed aircraft. Like its namesake, the American Quarter Horse, it will excel in sprinting short distances. The goal of Quarterhorse is to validate their proprietary Chimera engine in-flight and touch Mach 4+ speeds – breaking the nearly 50-year-old airspeed record held by the legendary SR-71.[8]

The Chimera engine uses the General Electric J85-21 in its turbine stage.[11]

Quarterhorse is on schedule to fly some time in 2024.[8]

### Darkhorse

Darkhorse is a hypersonic remotely piloted aircraft designed for defense and intelligence customers. The aircraft will have multi-mission flexibility and will be fully reusable.

In December 2022, Hermeus selected the Pratt & Whitney F100 engine turbofan to act as the turbine portion of Chimera II, the engine that will power Darkhorse.[12]

Darkhorse is on track for engine testing in 2025.[citation needed]

### Halcyon

Halcyon is a passenger aircraft capable of travelling over 125 trans-oceanic routes at hypersonic speeds with a range of 4,600 miles (7,400 km).[13] At those speeds, passengers could ostensibly travel from New York to Paris in 90 minutes, compared to 7 hours at subsonic speeds. That is approximately five times faster than any commercial aircraft available today.

In August 2020, Hermeus received a $1.5 million contract from the United States Air Force to develop their proposed aircraft to enter and serve the American presidential fleet in the future and function as a possible Air Force One .[14]

## See also

* Aerion
* Boom Technology
* Exosonic
* Spike Aerospace

## References

1. ↑ "ABOUT" (in en-US). https://www.hermeus.com/about.
2. ↑ "Hermeus wins seed funding for hypersonic aircraft, with former Blue Origin president as adviser". 13 May 2019. https://www.geekwire.com/2019/hermeus-wins-seed-funding-hypersonic-aircraft-former-blue-origin-president-adviser/. Retrieved 7 September 2020.
3. ↑ Berger, Eric (13 May 2019). "Hermeus announces plan to build the fastest aircraft in the world" (in en-us). Ars Technica. https://arstechnica.com/science/2019/05/hermeus-announces-plan-to-build-the-fastest-aircraft-in-the-world/. Retrieved 7 September 2020.
4. ↑ "PRESS RELEASE: NASA SAA" (in en-US). https://www.hermeus.com/press-release-nasa-saa.
5. ↑ "PRESS RELEASE: Funded to Flight" (in en-US). https://www.hermeus.com/press-release-funded-to-flight.
6. ↑ "PRESS RELEASE: Series B" (in en-US). https://www.hermeus.com/press-release-series-b.
7. ↑ 7.0 7.1 7.2 "Hermeus Completes Hypersonic Engine Milestone" (in en-US). https://www.hermeus.com/press-release-tbcc-milestone.
8. ↑ 8.0 8.1 8.2 "QUARTERHORSE" (in en-US). https://www.hermeus.com/quarterhorse.
9. ↑ "Hermeus Mode Transition Marks Milestone Toward Hypersonic Flight | Aviation Week Network". https://aviationweek.com/aerospace/aircraft-propulsion/hermeus-mode-transition-marks-milestone-toward-hypersonic-flight.
10. ↑ "Turbojet to hypersonic ramjet: Hybrid Chimera engine shows its range" (in en-US). 2023-01-24. https://newatlas.com/aircraft/hermeus-chimera-hypersonic-test/.
11. ↑ 'Could HERMEUS turn the hypersonic arms race on its head? June 2023
12. ↑ Hermeus-Pratt & Whitney Outline Hypersonic F100 Test Plan March 2023
13. ↑ "Hermeus | Hypersonic Aircraft Startup | Atlanta" (in en). https://www.hermeus.com/. Retrieved 7 September 2020.
14. ↑ Niles, Russ (6 September 2020). "Air Force Eying Supersonic Air Force One". AVweb. https://www.avweb.com/aviation-news/air-force-eying-supersonic-air-force-one/. Retrieved 7 September 2020.

## External links

* v
* t
* e

Supersonic transport

* Civil aviation
* Supersonic aircraft
* list

Withdrawn
from service|

* Concorde
* Tupolev Tu-144

Historic
projects|

| Airliners|

* Boeing 2707
* Bristol Type 223
* Convair Model 58-9
* Douglas 2229
* High Speed Civil Transport
* LAPCAT
* Lockheed L-2000
* Rockwell X-30
* Sud Aviation Super-Caravelle
* Tupolev Tu-244

|

Business jets|

* Aerion SBJ
* SAI Quiet Supersonic Transport
* Sukhoi-Gulfstream S-21
* Tupolev Tu-444

Current
projects|

| Airliners|

* HyperMach SonicStar
* Next Generation Supersonic Transport
* Reaction Engines A2
* Zero Emission Hyper Sonic Transport
* Boom Technology Boom

|

Business jets|

* Aerion AS2
* Gulfstream X-54
* Spike S-512

See also|

* Boom XB-1 Baby Boom
* Lockheed Martin X-59 QueSST
* Quiet Spike

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