[1] It was funded by the Defense Advanced Research Projects Agency (DARPA) and designed by Groen Brothers Aviation (GBA), which has since been re-branded as Skyworks Global.

GBA, along with Georgia Tech, Adams Aircraft Industries, and Williams International, worked on Phase 1 of that program, a 15-month effort funded at $6.4 million.

[3] In 2012, Groen Brothers Aviation was acquired by investor Steve Stevanovich as it was collapsing and nearly bankrupt, and was renamed Skyworks Global in 2017.

[4] In July 2019, Skyworks partnered with Northrop Grumman-owned Scaled Composites to develop a VertiJet gyrocopter prototype, aiming for a 348kn (644 km/h) cruise and a 1,000nmi (1,850 km) range; it was projected that the aircraft would fly within 18–24 months.

[4][needs update] Intended to fulfil the US Marine Corps’ armed escort requirements disclosed in April 2019 for a rotorcraft that could match the performance of the Bell Boeing V-22 Osprey; it was also projected that a commercial gyrocopter carrying four passengers could be built for less than $10 million.