Skyryse and Robinson Partner on R66-Based Group 4 UAS

Skyryse and Robinson Helicopter Company have entered a formal partnership to develop a Group 4 unmanned aircraft system for defense applications, integrating the SkyOS fly-by-wire system into the Robinson R66 platform. The June 24, 2026, announcement builds on a series of technical and financial milestones for El Segundo, California-based Skyryse, including a $300 million Series C funding round and the commencement of Federal Aviation Administration (FAA) for-credit flight testing earlier in the year.

The core of this technology is the Skyryse One, a heavily modified Robinson R66 that replaces traditional mechanical flight controls with a digital operating system. According to company publications, the integration of SkyOS is designed to reduce pilot workload and introduce automated safety features to the light helicopter market.

Replacing Mechanical Controls with SkyOS

In technical documents published by Skyryse, the company detailed the extensive modifications required to convert a standard Robinson R66 into the Skyryse One. The retrofit removes more than 100 traditional mechanical parts, including pull tubes, hydraulic systems, the cyclic, the collective, and anti-torque pedals. These are replaced by a single control stick and dual touchscreens.

By eliminating these mechanical linkages, Skyryse states the fly-by-wire system removes 324 potential failure points from the aircraft. The underlying Rolls-Royce RR300 turbine engine remains unchanged from the standard R66, which was originally certified by the FAA in 2010.

The SkyOS system introduces several automated flight capabilities. These include dynamic envelope protection, hover assist, and automated autorotation. Skyryse previously demonstrated the automated autorotation capability in 2023, setting a recognized world record for the maneuver.

Skyryse has set an introductory price of $1,800,000 for the Skyryse One, compared to approximately $1,400,000 for a standard Robinson R66 equipped with optional upgrades. The company anticipates the Skyryse One will be the only helicopter capable of Instrument Flight Rules (IFR) operations priced under two million dollars.

Expanding into Defense with Group 4 UAS

The June 2026 partnership between Skyryse and Torrance, California-based Robinson Helicopter Company pivots the SkyOS technology toward military applications. The companies are collaborating to produce a Group 4 unmanned aircraft system (UAV) based on the R66 airframe.

The uncrewed platform is intended to support a variety of military missions, including collaborative combat aircraft (CCA) operations, air-launched effects (ALE), and intelligence, surveillance, and reconnaissance (ISR) profiles.

“Defense agencies need autonomous aircraft that are reliable, affordable and available now, not years from now. Robinson gives us the production infrastructure to deliver at scale and at a cost point that meets real-world, time-critical needs.”

David Smith, President and CEO of Robinson Helicopter Company, noted in the joint press release that manufacturing the SkyOS-powered UAS represents a natural extension of the manufacturer‘s core competency in producing reliable aircraft at scale.

FAA Testing and Series C Funding

The defense partnership follows significant regulatory and financial progress for the civil Skyryse One program. On February 17, 2026, Skyryse announced it had received approval to enter for-credit flight testing with the FAA. This marks a critical phase in securing a supplemental type certificate for the modified aircraft. The company previously received a Special Airworthiness Certificate for the first Skyryse One in October 2024.

Coinciding with the FAA testing milestone, Skyryse announced the closure of a $300 million Series C funding round in February 2026. The capital injection brought the company’s valuation to $1.15 billion. Skyryse stated the funds will be used to advance FAA certification efforts and scale the deployment of the SkyOS system.

AirPro News analysis

We note that adapting a certified, mass-produced light helicopter like the Robinson R66 into a Group 4 UAS offers defense agencies a lower-risk, lower-cost alternative to clean-sheet military drone programs. By leveraging Robinson’s established manufacturing infrastructure, Skyryse can bypass the production scaling challenges that typically hinder aerospace startups attempting to build new aircraft from scratch.

The dual-track approach of pursuing civil FAA certification for the piloted Skyryse One while simultaneously developing a military UAS provides the company with diversified revenue potential. If Skyryse successfully certifies the fly-by-wire system for general aviation, the removal of complex mechanical linkages could fundamentally alter maintenance schedules and operational costs for light helicopter operators. The $400,000 price premium over a standard R66 will likely be weighed by operators against the promised safety enhancements and the rare inclusion of IFR capabilities in this weight class.

Sources: Skyryse Technical Comparison