Full scale propulsion tests are under way for the Butterfly programme. Once the results are in, and correlated to real-world data, the team will turn its attention to the full scale prototype.
Bristow backs Butterfly for next gen vertical flight
December 21, 2021
Bristow continues to add to its future fleet management options with eVTOL aircraft. On top of recent commitments, it has now pre-ordered up to 50 Butterflys for high density, noise sensitive passenger routes.
Overair ready to emerge as Butterfly from design cocoon
August 20, 2021
Butterfly's capability stems from its propulsion system, known as Optimum Speed Propulsion (OSP). The aircraft's four large propellers spin slowly in hover and even slower cruise, resulting in aerodynamic advantages.