CubCrafters has introduced a turbine-powered version of its Carbon Cub UL, putting a French regenerative turboprop engine on the nose of one of the lightest high-performance backcountry airplanes currently in production.
The Carbon Cub ULT is based on the already impressive Carbon Cub UL platform, which traces its roots to CubCrafters’ long-running effort to modernize the classic Piper Super Cub. The ULT iteration replaces the UL’s Rotax piston engine with a TurboTech TP-R90 regenerative turboprop. CubCrafters says the new aircraft is aimed at the FAA’s MOSAIC era, which expands light-sport aircraft rules and allows new propulsion types, including turbine engines.
Despite the addition of a turbine whine, however, the Carbon Cub ULT is not pitched as a faster or more powerful Carbon Cub so much as a different kind of Carbon Cub altogether: one with turbine smoothness, Jet-A/diesel fuel capability, push-button start and single-lever FADEC engine control, while retaining performance similar to the Rotax-powered Carbon Cub UL.
CubCrafters announced the airplane on July 7, 2026, ahead of its planned public debut at EAA AirVenture Oshkosh this month. The company said it is accepting customer deposits, with first deliveries expected in 2027.
Built for MOSAIC
CubCrafters says the ULT is the first US-manufactured turboprop aircraft eligible to be flown by sport pilots under the FAA’s new MOSAIC regulations.
The aircraft uses the FADEC-controlled TurboTech engine to automatically manage fuel flow, ignition, engine temperatures and propeller operation. CubCrafters says pilots start the aircraft by turning on the master switch and pressing the start button, with the FADEC handling the start sequence to ease workload.
The prototype cockpit shown by CubCrafters includes Garmin G3X Touch avionics, along with a dedicated turbine engine display for the TurboTech turboprop installation.
Unlike a conventional small turboprop, the TurboTech engine uses a regenerative cycle. The system recovers heat from the exhaust and uses it to preheat intake air before combustion. That improves efficiency and is intended to give the engine fuel consumption closer to a modern piston engine while retaining turbine smoothness and Jet-A/diesel compatibility.
TurboTech is a French aerospace company founded by former Safran engineers. Safran and GO Capital announced an investment in TurboTech in 2018, describing the company as a startup developing a new generation of turbine engines and hybrid propulsion systems.
The engine has been in development for several years and has already flown in European light-aircraft applications. TurboTech engines have been flying in European ultralight aircraft including those built by Bristell, JMB and GoGetAir aircraft, as well as two helicopters.
CubCrafters identifies the ULT powerplant as the TurboTech TP-R90 / R150. Its comparison page lists a power rating of 160 hp with “turbine + electric boost.” TurboTech’s current TP-R150 data lists a maximum output of 141 hp, eco-cruise fuel burn of about 5.0 gal/h at 50% power, a fully equipped weight of about 190 lb and a 3,000-hour time between overhauls.
Advanced engineering work
On paper, the ULT’s published performance is close to the Rotax-powered Carbon Cub UL. CubCrafters lists both aircraft at more than 113 kt cruise speed, 28 kt stall speed, 50 ft takeoff distance and 90 ft landing distance when comparing the ULT with the higher-fuel, variable-pitch Carbon Cub UL configuration.
CubCrafters has published an estimated empty weight of 880 lb, a maximum gross weight of 1,865 lb and an estimated useful load of 985 lb.
The aircraft carries 44 gal of fuel and has an estimated endurance of 5.2 hours and range of 682 statute miles, or about 593 nm. CubCrafters lists estimated cruise speed at more than 113 kt, stall speed at 28 kt, takeoff distance at 50 ft and landing distance at 90 ft. The company notes that performance figures assume optimal conditions and that actual numbers will vary.
The ULT has a 34 ft 3 in wingspan, 179 sq ft of wing area and seating for two. CubCrafters lists the aircraft as single-engine land and sea, with Light Sport and Experimental Amateur-Built factory builder-assist certification options.
“The Carbon Cub ULT represents some of the most advanced engineering work ever undertaken at CubCrafters,” said Patrick Horgan, CubCrafters President and CEO. “Bringing together regenerative turbine technology, full FADEC controls, lightweight composite construction, and our proven STOL capability into a practical backcountry aircraft demanded an incredible amount of focused innovation and refinement from our team.”
TurboTech CEO Damien Fauvet said CubCrafters is the company’s launch partner in the United States.
“CubCrafters has an exceptional reputation for innovation and engineering excellence in backcountry aviation, and the Carbon Cub ULT is an ideal platform to demonstrate the capabilities of the TP-R90 engine,” Fauvet said.
CubCrafters lists the Carbon Cub ULT base price as “TBD.” The turbine-powered model is likely to command a steep premium over the Rotax-powered Carbon Cub UL, which starts at $293,900, according to the company’s comparison page.
CubCrafters said the aircraft is undergoing flight testing near its headquarters in Yakima, Washington. The company plans to display the Carbon Cub ULT at booths 272-274 during EAA AirVenture 2026.