Research FLEET

AT-One operates Europe’s largest civilian research fleet of aeroplanes and helicopters. The wide variety of test aircraft are equipped with a large array of test equipment and can be modified according to the needs of specific research tasks.

Falcon 2000LX “ISTAR”

The In-flight Systems and Technology Airborne Research (ISTAR) aircraft is an in-flight simulator that will support the expansion of scientific knowledge about automated and uncrewed flying and the implementation of more advanced pilot assistance systems. ISTAR will also enable a major leap forward in digitisation for aviation – the aim is to create a digital twin that will accompany the aircraft over its entire lifespan.

Airbus A320-232 “D-ATRA”

The Airbus A320-232 ‘D-ATRA’ has been in service for the DLR since late 2008 and is the largest member of its fleet. The Advanced Technology Research Aircraft (ATRA) is a flexible modern flight research platform that is setting new benchmarks for airborne test vehicles in European aeronautics research.

Eurocopter EC135 ACT/FHS “Flying Helicopter Simulator”

The ACT/FHS ‘Flying Helicopter Simulator’ of the DLR is based on a standard Eurocopter EC 135 type helicopter, which has been extensively modified for use as a research and test aircraft. The mechanical controls, for example, have been replaced by a fly-by-wire/fly-by-light flight control system.

Dornier Do 228-101 “D-CODE”

The Dornier Do 228-101 ‘D-CODE’, a universal flying research platform operated by the DLR, serves as a carrier system for flight tests and experiments for DLR institutes and numerous external customers.

Cessna Citation II

A Cessna Citation II laboratory aircraft for flight testing of systems, sensors or procedures from and for our customers. The Citation is equipped with a state-of-the art cockpit with options for testing customer displays (certified and experimental), controls and concepts.


HeliTech is a RPAS helicopter which enables NLR to facilitate testing of large sensors and provide pilot training for heavy-class RPAS. This helicopter (PH-1AP) has a maximum take-off mass of 40 kilogrammes, a rotor diameter of 2.6 metre, and is equipped with a gas turbine engine.


With the Pipistrel Velis Electro NLR will, among other things, explore the possibility of increasing the range of the Pipistrel Velis Electro through new battery technology or a fuel cell and aerodynamic training and build up knowledge and experience of behavior and properties associated with an electrically powered aircraft.