He flew the next model, named the BlackFly, in August 2014 and then relocated the company to Palo Alto, California in September 2014.

[1][6] In discussing the design in person with Leng at AirVenture in July 2018, AVweb reviewer Paul Bertorelli indicated that it is "a terrific idea and I'm betting the concept itself has legs, whether Opener's version fails to gain a market or not", but expressed concern about the lack of pricing and "cost/value relationship" marketing overreach.

Bertorelli also expressed concern that the company did not allow journalists access to look over the aircraft and would not answer any technical questions.

[7] The new CEO of Opener, Ben Diachun stated in January 2020 that the BlackFly was close to being ready for manufacturing and sales.

In hover mode, the aircraft is pitched roughly vertically and maintains its position and altitude by default, though it can move laterally and longitudinally, as well as change its heading, if commanded.

In cruise mode, the aircraft is pitched roughly horizontally and maintains straight and level flight by default, though it can accelerate forwards and backwards, as well as make coordinated turns, if commanded.

For efficient Cruise flight, the BlackFly cants the wings and propellers to an optimal angle of attack.

The landing gear consists of a rub-strip on the bottom of an amphibious hull and a small rubber bumper on the rear of the fuselage.

The vehicle is designed to fly from a grass surface, but can also be flown from asphalt, snow, ice, and fresh water (in potential emergencies).

The elevons are in the prop-wash of the outer propellers, enhancing their roll and pitch authority at low speeds.