Navy Doubles Down On X-BAT VTOL ‘Fighter’ Drone Development
Shield AI says it is on track to roll out the first prototypes of its X-BAT jet-powered stealth ‘fighter’ drone by the end of this month. Flight testing of this uncrewed aircraft, which is designed to take off and land vertically from a tail-sitting position, is still scheduled to kick off before the end of the year. X-BAT’s core concept was already highly ambitious, but an extremely aggressive timeline to reach some degree of operational capability through the U.S. Navy’s Runway Independent Maritime Expeditionary Strike (RIMES) program has now been disclosed.
TWZ got an update on X-BAT, which we were first to report on in-depth last year, in an interview yesterday with Shield AI’s Armor Harris, Senior Vice President and General Manager of the company’s aircraft division. This came ahead of today’s announcement that the company has received an additional $150 million in funding from the Office of the Under Secretary of War for Acquisition and Sustainment through its Defense Exportability Features program via the Navy. This is on top of the $50 million investment the Navy, in cooperation with the Pentagon’s Defense Innovation Unit, made in X-BAT’s development earlier this year as part of the RIMES effort. Shield AI has committed an equivalent amount of internal funding, for a combined total of $400 million.
Jamie Hunter
“In broad strokes, the last year has been a bunch of collaborative risk reduction with the Navy. So, wind tunnel testing, engine testing, thermal testing, all kinds of stuff to basically take the major risks in the program, [and] burn them down, so we can move confidently into the production design,” Shield AI’s Harris told us. “The last culmination of the risk reduction is the flight testing of the two full-scale prototypes. The first one of those will be done at the end of October.”
“That’s a full-scale vehicle,” he continued. “It’s got the outer mold line, it’s got the F110 engine, the full propulsion path, everything in it.”
To date, Shield AI has only shown models of the X-BAT publicly. A new one displayed at the Navy League’s Sea-Air-Space 2026 exposition in April revealed major changes to the core design. This included a complete reworking of the planform from a ‘cranked kite’ type arrangement to one with a distinctly different arrowhead-shaped profile featuring a straight leading edge with a more dramatic sweep.
The video below includes clips showing the original X-BAT design and the current one.
The aforementioned “propulsion path,” testing of which has already been conducted on the ground, primarily consists of the General Electric F110 paired with an Axisymmetric Vectoring Exhaust Nozzle (AVEN). The nozzle was originally developed in the 1990s for an experimental thrust-vectoring F-16 fighter. Shield AI is using the original AVEN, which had been in storage for decades, to support development of X-BAT. The nozzle will provide pitch and yaw control, with roll control for the drone coming from bleed air routed through thrusters in the drone’s wings.
No runway, no problem.
Shield AI and @GE_Aerospace just cleared a critical path to vertical flight, completing engine light-off testing of the Axisymmetric Vectoring Exhaust Nozzle (AVEN) for X-BAT.
Engineers from both companies integrated the AVEN into GE Aerospace's… pic.twitter.com/OxV3y3sRKB
— Shield AI (@shieldaitech) July 20, 2026
Shield AI has previously said that the roughly fighter-sized X-BAT will have a maximum range of 2,000 nautical miles and a service ceiling of around 50,000 feet. The company has also said in the past it is targeting an effective combat radius roughly twice that of the F-35, or around 1,340 nautical miles, but also that it could be closer to 1,000 nautical miles. Space has been made within the X-BAT design for a potential in-flight refueling capability, but there is no active work yet to integrate that feature.
In terms of payload, X-BAT’s design includes internal weapons bays roughly the same size as those on the F-35, as well as two external hardpoints under the wings. Those hardpoints are plumbed, meaning that range-extending drop tanks, or even buddy refueling stores to allow the drone to act as a tanker, could be carried. Baked-in modularity and open-architecture mission systems are intended to make it easier to fit various sensors, data links, and other capabilities down the line.
A rendering highlighting X-BAT’s stores carrying capabilities. Two AGM-154 Joint Stand-Off Weapon (JSOW) glide bombs are depicted here in the internal bays. The silhouette of an AGM-158C Long Range Anti-Ship Missile (LRASM) cruise missile is shown under the wing. Shield AI
“X-BAT’s really designed to be a multi-role capability, and, if you look out at the 10-20 year time horizon, it’s hard to predict what the future fight is going to look like,” Shield AI’s Harris noted. “We fundamentally believe that multi-role capabilities are critically Important. And, so, X-BAT, the reason why it’s sized to where it is is [sic] to be able to carry serious strike weapons internally and externally, in addition to being able to do air-to-air [combat], electronic warfare, and other mission sets.
“You could think of it as like X-35 versus F-35,” he also said yesterday when asked about any expectations now for further changes between the initial pair of prototypes and the final production design.
Lockheed Martin’s X-35 demonstrators are, in very broad strokes, similar to, but distinct from any of the resulting variants of the Joint Strike Fighter. Shield AI has notably already talked in the past about integrating more low-observable (stealthy) attributes to the exhaust end of the design down the line.
A side-by-side look at an X-35 de
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