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Greetings From the DNW --

by Larry Young

May 6, 1998

Greetings from the DNW (Duits-Nederlandse Windtunnel) in The Netherlands (also known as Holland). The DNW is a German- and Dutch-owned and operated wind tunnel. The DNW wind tunnel is particularly well suited for aeroacoustic research for various types of vehicles such as automobiles, airplanes and rotorcraft.

NASA, U.S. Army and Boeing researchers are currently at the DNW wind tunnel studying the aerodynamics and acoustics of a 1/4-scale V-22 Osprey tiltrotor proprotor. This proprotor is being tested on the isolated rotor configuration of the Tilt Rotor Aeroacoustic Model (TRAM). This is the third week of a four-week test entry. This is the second time the TRAM test stand has been tested in the DNW. Earlier, preliminary testing occurred in December, 1997.

The information from this test will be used to help develop a new generation of quieter and more efficient tiltrotor aircraft. Tiltrotor aircraft are of great research interest to NASA. They have possible civilian as well as military applications. Data from the DNW tests will be used in conjunction with data from future tests in the National Full-Scale Aerodynamics Complex at NASA Ames Research Center to aid in the development of these quieter tiltrotors.

Right now the TRAM test team is working long hours trying to acquire all the data needed to meet the test objectives and make the test a success. The data being acquired is one of a kind information. Gigabytes of data are being measured and stored for future study. The two key challenges of any rotorcraft test team are, first, keeping the model 'healthy' and operational and, second, reviewing and evaluating the quality and comprehensiveness of the test data being measured.

On a more personal note, Holland is a beautiful country in the spring time. Holland is located adjacent to Belgium and Germany in Western Europe. Holland is famous for its tulips, wind mills, canals and dikes that protect it from the sea. Whether it's exploring the countryside or its largest and best known city, Amsterdam, Holland is a great place to visit (or, more correctly in the case of the TRAM test team, work in).

Tot Straks!! ('See you later' in the Dutch language)


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