FAA awards JetZero $5.3 million to instrument blended-wing demonstrator

The FAA has awarded JetZero $5.3 million to instrument the engines and nacelles of Jet1, the full-scale blended-wing-body demonstrator the Long Beach, California company has scheduled for first flight in the fourth quarter of 2027. The award, announced on October 28, 2026, falls under Phase IV of the FAA's Continuous Lower Energy, Emissions and Noise (CLEEN) program.

The money buys data, not hardware. JetZero says the instrumentation will record airflow at the engine inlet and at the fan exit during takeoff, climb, cruise and crosswind ground operations. The company frames this as an advance over engine test rigs and simulated ground-plane testing: measurements taken from an operating aircraft. JetZero said it will share the resulting data.

Why top-mounted engines matter

The measurements target the feature that most distinguishes JetZero's design: engines mounted on top of the airframe. The company claims that placement reduces noise for communities around airports — one of the three areas CLEEN addresses, alongside fuel burn and emissions.

That claim remains untested in flight. No blended-wing-body aircraft with top-mounted engines has operated in commercial service, so the shielding benefit exists so far only in modeling. The CLEEN instrumentation is the first step toward verifying it with real inlet and fan-exit data.

What does the funding change for the program?

It adds a taxpayer-funded measurement campaign to a demonstrator already financed largely by defense money. Jet1 is powered by two Pratt & Whitney PW2040 engines, the model used on the Boeing 757. Under agreements RTX announced on March 6, 2025, Collins Aerospace is designing and building the demonstrator's nacelle structures, including the inlet, fan cowl and fan duct.

The US Air Force selected JetZero in August 2023 to develop and flight-test the demonstrator, with the Department of Defense planning to contribute $235 million over four years. JetZero closed a $100 million loan facility on August 31, 2026, when it said the Jet1 build was 40% complete as of June 2026. Scaled Composites, a Northrop Grumman company, is building the aircraft.

JetZero joins a reshaped CLEEN phase

The FAA launched CLEEN Phase IV in September 2026 with two-year agreements to Boeing, GE Aerospace, Heart Aerospace, Honeywell Aerospace and JetZero. The three previous phases, starting in 2010, ran on five-year agreements and consisted largely of established airframe, engine and component manufacturers. Phase IV admits a blended-wing-body startup and a hybrid-electric regional developer.

Heart Aerospace announced on October 12, 2026 that it had received $2.9 million for turbogenerator work on its ES-36 hybrid-electric regional aircraft, matched by an equal company contribution. JetZero disclosed no cost share and no total project value — a gap worth noting when comparing the two awards.

Timing is tight. If JetZero's agreement runs the two-year term the FAA describes, Jet1's scheduled first flight would leave the in-flight portion of the work compressed into the second half of that period. A schedule slip would shrink the measurement window further.

From demonstrator to Z4

The demonstrator serves a larger commercial ambition. JetZero targets entry into service of its production aircraft, the Z4, in the early 2030s, with final assembly at the factory where it broke ground in Greensboro, North Carolina, on June 15, 2026.

The company says the Z4 is designed to be up to 50% more fuel efficient than comparable tube-and-wing aircraft using the same propulsion technology. That figure is a design target, not a certified result, and the words "up to" carry the usual load. Jet1's flight-test data — including the airflow measurements the FAA is now funding — will determine whether the claim survives contact with reality.

Until then, the $5.3 million buys the program its first independently relevant dataset: how air actually behaves at the inlet of a top-mounted engine in flight.