Geschichte des Instituts

History – Road Map of Events: 1979-1988

1981 Launching of VFW 614 in-flight simulator project ATTAS (Advanced Technologies Testing Aircraft System). The research aircraft was jointly developed with Dasa Bremen and Liebherr Aerospace.

1983-1994 Member of Special Research Project (Sonderforschungsbereich) SFB 212 on Aviation Safety. During this period, issues pertaining to flight safety and related problem areas were addressed. Excellent rapport and technical contributions paved the way to continuation of the traditional participation since 1995 in a yet another project SFB 420 on Flight Measurement Techniques.

1984 First vortex-wake aircraft interaction study on request of Frankfurt Airport. Dynamic aircraft response to a perpendicular vortex entry investigated.

Meeting with the Indonesian Minister of State for Research and Technology and President of IPTN B.J. Habibie (center), B. Rebe, President of the Technical University of Braunschweig (right), and P. Hamel in the ATTAS Cockpit.
1984 A new flight test technique GRATE (Ground-Attack-Testing) for unmasking handling qualities deficiencies was developed. It was used at the German Forces Flight Test Center WTD 61 for aircraft flying qualities assessments and pilot training. A derivative dubbed ATLAS was developed by NASA Dryden Flight Research Center and used within cooperative flight test programs with the Institute (Memorandum of Understanding between USAF-FMOD/ DLR) and at the Air Force Test Pilot School, Edwards Air Force Base.

1984 Completion of the onboard and ground-based Flight Test Instrumentation System (FTIS) for the Indonesian CN 235 prototype aircraft. This project included a fully equipped autonomous Container-City and was accomplished within only 15 months. A multiyear government supported cooperation with IPTN followed including Man Power Development and Training (MPDT) programs, ATTAS in-flight simulation investigations for the N 250 fly-by-wire transport aircraft, and N 250 flight test instrumentation support.

Indonesian prototype aircraft CN 235 (1985)
1985 First version of a dialog-oriented flight test data analysis package DIVA (Dialogorientierte Versuchsdatenanalyse) tested and implemented. DIVA later became the standard flight data analysis code for flight test engineers at the Institute and partner organizations such as German Forces Flight Test Center WTD 61 and Dasa Flight Test Center, both in Manching. It is used in common projects like X-31A and Eurofighter.

1985 First in-flight simulation performed with the airborne fly-by-wire/light Helicopter Bo 105 ATTHeS (Advanced Technologies Testing Helicopter System). The decoupling of the rigid rotor response of the host helicopter was the most challenging task and rendered feasible only by diligent modeling of higher-order rotor dynamics and the implementation of a high bandwidth model following control system. ATTHeS became the only European test facility for rotorcraft in-flight simulation. ATTHeS was operated until 1995 with a total of about 1300 hours of digital-electronic flight control experience when the research helicopter was lost during a routine flight.

In-flight Simulator Bo 105 S-3 ATTHeS (foreground) Bo 105 S-123 (background)
1985 First entry of newly designed modular rotor test rig in DNW. This test rig, later dubbed ROTOS (Rotor-on-Sting), was commonly designed with MBB-UD and incorporates an internal balance, a hydraulic drive motor, and a PCM data acquisition system. ROTOS and an upgraded version will be heavily used in future DNW model rotor test campaigns.

Versatile sting-mounted rotor test rig ROTOS in DNW with advanced rotor blades (1989)
1988-1990 Launching, chairing, and managing multinational AGARD FMP Working Group 18 on Rotorcraft System Identification comprising a wide range of research specialists and industry representatives. Special Bo 105 flight tests were initiated at the Institute resulting in a world-unique high quality flight data compendium for model validation purposes and flight control law investigations. The outcome of this working group resulted in the preparation of the standard reference documents AGARD Advisory Report 280 and Lecture Series 178.

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