r/JobyvsArcher

On October 6, 2026, Vertical Aerospace Group Ltd. (“VAGL”), a wholly-owned subsidiary of Vertical Aerospace Ltd. (the “Company”), filed a patent infringement counterclaim against Archer Aviation Inc. (“Archer Aviation”) in the U.S. District Court for the Eastern District of Texas, alleging that Archer
Aviation’s electric vertical take-off and landing (“eVTOL”) Midnight aircraft infringes one or more claims of VAGL’s U.S. Patent No. 12,747,027 (the “Counterclaim”). VAGL filed the Counterclaim in the lawsuit that Archer Aviation brought against the Company and VAGL on February 23, 2026 (Archer Aviation Inc. v. Vertical Aerospace Ltd. & Vertical Aerospace Group Ltd., Civil Action No. 2:26-cv-00149-JRG). In its Counterclaim, VAGL seeks, among other things, injunctive relief to prevent further infringement as well as monetary damages.

What y’all think.

I had Gemini look at it..

This Form 6-K filing marks an escalation in the legal conflict between Vertical Aerospace Group Ltd. and Archer Aviation.
Filing a patent counterclaim under Chief Judge J. Rodney Gilstrap in the U.S. District Court for the Eastern District of Texas (Sam B. Hall, Jr. Federal Building and United States Court House, Marshall Division) changes the dynamics of this litigation.

An assessment of the technical, legal, and commercial merits of U.S. Patent No. 12,747,027 and this countersuit highlights key factors at play.

1. Technical Merits: The Substance of U.S. Patent No. 12,747,027
U.S. Patent No. 12,747,027 (invented by James Sheppard and Andrea De Matteis, assigned to Vertical Aerospace Group Limited under classification B64D 33/10) is titled:

"Propulsion system thermal management with propulsor fluid flow and ram fluid flow"

What the Patent Actually Covers:
It protects a thermal architecture for eVTOL powertrains that integrates cooling systems into the propulsion nacelles and airframe.
Specifically, it covers a dual-mode thermal management system that cools high-draw electric powertrain components (inverters, electric propulsion units, and battery buses) using propulsor-induced wash during vertical hover and switches/supplements with ram air flow during forward wingborne cruise.

Managing heat dissipation during high-power hover without adding the heavy drag of oversized conventional radiators is a core physics hurdle in eVTOL design. Vertical secured broad claims on routing airflow past heat exchangers using the slipstream of tilting/stowable rotors.

Why the Claim Against Archer's Midnight Carries Weight:
Archer’s Midnight relies on a 12-rotor architecture mounted along high-wing booms, requiring active cooling for 12 electric engines and multiple battery packs during hover and transition.
If Archer’s production cooling ducting, nacelle heat exchangers, or inverter radiators rely on fluid/ram airflow patterns claimed in the '027 patent, Archer faces utility infringement exposure. Unlike design patents, utility patents on powertrain cooling cannot be easily sidestepped with minor cosmetic alterations.

2. Legal Merits: Strategic Shifting in the Eastern District of Texas
Countering the "Copycat" Narrative: Archer initially filed suit claiming Vertical’s Valo mimicked the exterior ornamental lines of Midnight. By asserting a recently granted utility patent directly against the Midnight propulsion thermal system, Vertical is legally reframing the dispute: arguing that Archer built its flagship aircraft on Vertical’s underlying thermal engineering IP.

Trial Posture Under Judge Gilstrap: The Marshall Division of EDTX is known for rapid trial schedules and high risks of patent injunctions. By filing a counterclaim seeking injunctive relief (which could technically halt testing or commercial production of the accused Midnight airframes in the U.S.), Vertical creates mutual risk.

Archer's Rebuttal Defense: Archer will likely challenge the patent's validity by filing an Inter Partes Review (IPR) before the Patent Trial and Appeal Board (PTAB), arguing prior art in multi-rotor drone or tiltrotor thermal systems (such as legacy V-22 or Bell architectures).

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