A control concept inspired by nature and combined with morphing technology has now been
realized by engineering students of ETH Zurich together with aviation experts. The eight-member
student team is testing novel control concepts and construction methods in aviation. The aim is to
reduce energy consumption and noise generation through reduced drag and to improve the
maneuverability of the aircraft.
Schübeler Technologies actively supported this innovative project and provided both engines and
technical expertise in an advisory capacity. “By participating in this project, we would like to contribute
to the further development of aviation,” explains Daniel Schübeler, Managing Director of Schübeler
Technologies. “The visionary approach of Bionic Flying Wing as well as the enthusiasm and creativity of
the team excited us.”
The project aims to prove the feasibility of bionic inspired morphing concepts in the air. To this end, a
deformable morphing wing structure with a three-meter wingspan was developed to be used in place of
discrete flaps. A top speed of up to 100 km/h can be achieved with it. The wing structures are
specifically deformed to replace conventional control surfaces. In this way, new design potential for the
aircraft of tomorrow is opened up The main challenge of this approach is that the wing must be stiff –
i.e., it must not flap – but still be able to be deflected. To achieve both, a healthy compromise had to be
found. Because of its high strength and low weight, the team therefore opted for CFRP (carbon-fiber-
reinforced polymer) as the construction material.
The requirements for the drive system used were also high. In the search for an efficient impeller that
delivers the greatest possible thrust in combination with low power consumption, the team quickly
came across EDF market leader Schübeler. On Schübeler’s recommendation, the team decided on the
DS-51-AXI HDS model with an 1125kv motor and 12 lipo cells. This drive offers a thrust of 5.5 kg (about
55N) with a current consumption of 85 amps, which was perfectly suited for an aircraft of this speed,
size and weight. Two fans are used and provide a total thrust of approximately 11kg (110N).
The HDS fan is a quality product designed for durability. The lightweight and highly shortened rotor
assembly provides efficient operation through high smoothness. The blades are made of high-
temperature, fiber-reinforced polymer, operate highly efficiently, broadband, and quietly. Strength is
provided by the carbon shroud.
In a successful first test flight in June of this year, the team proved that bionic inspired morphing
concepts can be used to safely control a flying wing aircraft. This was the product of countless hours of