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The U.S. Marine Corps is set to test at least two new autonomous cargo helicopters, as it seeks to field platforms that can rapidly resupply Marines in contested environments. The service recently awarded contracts for two such platforms, one being the R66 Turbinetruck that inserts Sikorsky’s MATRIX autonomy system in the proven Robinson R66 airframe. The second is the Uncrewed 505, a development of the Bell 505 in a program led by Near Earth Autonomy, in collaboration with Bell Textron, Moog Inc., and XP Services.

This is all part of ongoing efforts to develop uncrewed logistics platforms that the Marines can use in contested environments, something that is of particular relevance as the branch looks to the requirements for a future conflict with China in the Pacific.

Lockheed Martin announced yesterday that its Sikorsky subsidiary and Robinson Unmanned had received a contract for the Turbinetruck from the Marine Corps. This comes under the Marines’ new-look Autonomous Aerial Logistics Program Medium Aerial Resupply Vehicle — Expeditionary Logistics (MARV-EL). The contract is worth $15.5 million and covers Increment 2 of MARV-EL.

“As we expand the MATRIX family, we also extend the reach of uncrewed solutions for both civil and military customers,” said Rich Benton, vice president and general manager of Sikorsky. “The commercially developed R66 Turbinetruck is simple, economical, and re-configurable; ideal for high-risk, hard-to-reach environments, where keeping personnel out of harm’s way is essential.”

“Our partnership with Sikorsky brings the trusted performance and reliability of the R66 platform into the unmanned logistics arena,” added David Smith, president and CEO of Robinson Helicopter Company. “The R66 Turbinetruck represents a significant step forward in expanding proven rotorcraft into scalable, autonomous cargo solutions for demanding operational environments. Together, we are delivering a game‑changing capability that will enhance warfighter readiness and open new opportunities for safe, reliable, and affordable autonomous transport.”

Robinson Unmanned | The Future of Autonomous Rotorcraft is Here

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The R66 Turbinetruck puts together the R66 airframe from the Robinson Helicopter Company, a single-turbine engine design that is best known as a five-seat light rotorcraft on the commercial market. The R66 was selected for the Turbinetruck application primarily on account of its reliability, low maintenance demands, and high level of versatility. The aircraft is currently in widespread civilian service as a trainer, passenger, and utility helicopter.

Combining the R66 airframe with Sikorsky’s MATRIX system provides the ability to perform autonomous uncrewed operations. MATRIX has previously been proven in a U.S. Army UH-60M helicopter, giving it a ‘robotic brain,’ and the culmination of a series of tests stretching back years now that have been steadily working on ever-greater pilot-optional capabilities for the Black Hawk family. As we have noted in the past, the same technology could easily find its way onto other aircraft, as evidenced by the Turbinetruck.

Sikorsky and DARPA Autonomous Black Hawk Flies Logistics and Rescue Missions Without Pilots on Board

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Lockheed Martin says the Turbinetruck is intended to give the Marines “flexible, affordable and rapid combat sustainment,” with its primary roles including the delivery of ammunition, medical supplies, and other essential equipment directly to the troops that need it. These critical loads need to be supplied “regardless of terrain, weather, or enemy threat,” the company adds.

According to Robinson Helicopter, the Turbinetruck can carry a load of 1,300 pounds internally, or external loads supported via a cargo hook. The internal cargo compartment is accessed via front clamshell doors and a right-hand baggage door. A total useful load of 1,500 pounds can be transported, and the aircraft has a range of more than 325 nautical miles.

When it comes to MARV-EL, this now stipulates an uncrewed aircraft that can carry a logistic payload of between 1,300 and 2,500 pounds to a combat radius of 100 nautical miles, operating through a common digital handheld device.

In an operational scenario, the mission objectives would be entered into the Turbinetruck using a digital tablet. The system would then automatically create a flight plan, using sensors and algorithms to guide the helicopter safely to the target location.

The Turbinetruck would allow the Marines to conduct critical logistics missions without having to put any additional personnel at risk, as would be the case if crewed rotorcraft were employed at the tactical edge of the battlefield. Crewed rotorcraft also come with increased demands on maintenance and availability. Meanwhile, crew-rest cycles might mean that the aircraft have to stay on the ground during high-tempo operations, while these assets will inevitably be in heavy demand for all kinds of other missions in any kind of high-end fight.

A video outlining the Robinson R66 Army Trainer, a crewed version of the helicopter offered to the U.S. Army schoolhouse:

Robinson R66 Army Trainer Helicopter | Press Conference & Official Reveal | AAAA in Nashville

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At the same time, the MARV-EL concept is especially tailored for the Indo-Pacific theater, in which Marines and other U.S. military forces would be expected to fight from and around austere forward operating bases — a concept known as Expeditionary Advanced Base Operations — as well as unimproved landing zones, and from the decks of ships.

In this context, the Turbinetruck, and the MARV-EL program, more generally, hope to fill a notable capability gap between small tactical drones and larger crewed airlifters. This is something that Lockheed Martin describes as a “middleweight” uncrewed logistics platform capable.

Robinson Unmanned will deliver the first R66 Turbinetruck to Sikorsky for integration, test and evaluation, and demonstration. At that point, the aircraft will undertake capability demonstrations to prove out the MATRIX system in the R66 airframe.

Since MATRIX is platform-agnostic and has an open architecture design, it is intended to be easily integrated into various airframes.

As for the rival Uncrewed 505, this takes the Bell 505 Jet Ranger X helicopter and combines it with Near Earth’s Captain autonomous system, and Moog’s Genesys avionics. The 505 is also a single-turbine helicopter that is in use in similar training, passenger, and utility roles as the R66.

The MARV-EL Increment 2 program will also see the Uncrewed 505 prototype developed for the Marine Corps. Near Earth says it will spend the next 36 months integrating and flight-testing the autonomous flight system in the Uncrewed 505, before progressing from early demonstrations to full mission capability.

“The program is to develop an uncrewed aerial logistics aircraft for where the risk and need are highest,” said Lyle Chamberlain, CTO of Near Earth. “We are combining our Captain autonomy architecture with a proven Bell 505 platform to move cargo without putting Marines in harm’s way. To be as intuitive as possible, we are designing the aircraft around existing Marine Corps workflows. Operators will be able to request, dispatch, and manage missions through familiar command-and-control pathways, including MAGTAB and MANGL integration. At the same time, cargo can be loaded with standard pallet jacks and forklifts. This approach reduces infrastructure burden and helps make autonomous resupply practical for expeditionary operations.”

Near Earth says the Uncrewed 505 is optimized for efficient transportability, with two aircraft fitting inside a C-130 cargo aircraft with minimal disassembly.

Other aircraft have previously emerged out of the MARV-EL program.

These included the Kargo UAV, a rotary-wing drone from the Kaman Corporation, which previously developed an optionally crewed version of its K-Max helicopter.

KARGO UAV | Transforming Expeditionary Logistics

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Notably, Kaman partnered with Near Earth Autonomy for the autonomy system for both the Kargo UAV and the optionally crewed K-Max.

Another competitor for MARV-EL was the SeaOnyx from Leidos. In 2023, it was announced that Leidos had won a Marine Corps contract to develop a prototype of this autonomous resupply vehicle under the Medium Unmanned Logistics Systems — Air (MULS-A) program, which later became MARV-EL.

However, neither of these platforms met Marine Corps requirements, leading to MARV-EL being recompeted. At the same time, the previous requirements (including delivering a logistics payload of 300-600 pounds within a radius of 25 to 100 nautical miles to a combat area) were made more ambitious, increasing cargo payload and range.

Overall, MARV-EL again highlights the Marines’ growing focus on expeditionary warfare in contested environments, in the Pacific theater especially. With their versatile airframes, the R66 Turbinetruck and the Uncrewed 505 could be adapted for other missions, including intelligence, surveillance, and reconnaissance (ISR), electronic warfare (EW), communications relay, and search and rescue. All of these are growth areas for the Marines specifically and the U.S. military more generally.

Bell 505: Ideal Trainer

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At the same time, the R66 already has a foothold with the U.S. military, with TH-66 Sage used to train U.S. Army and Navy helicopter operators, under contract. The Army is also now looking at both the R66 and the Bell 505 for its Flight School Next training helicopter program.

Whichever design or designs are ultimately selected for the MARV-EL requirement, the Marines can expect a new medium-weight logistics platform that bridges the gap between smaller drones and larger crewed aircraft currently in use. At the same time, it will help reduce risk by keeping more fixed-wing and helicopter crews out of harm’s way.

Contact the author: thomas@thewarzone.com