Commemorating ten years operation of the Indonesian low speed tunnel (ILST)

The Indonesian Low Speed Tunnel (ILST) commissioned in 1987 is a closed circuit one with a working testsection of 4 x 3 m and 10 m in length which is a combined of two: front and rear test sections. The upstream part has a length of 5.75 and the downstream one is 4.25 m. In total four arrangement can be made, and it is moveable on a transverse rails. The tunnel has a nominal speed of 110 mps.
There are two balances facilitating force measurements. external and internal balances. Four possible model attachments are provided enabling either two or three ‹:limensional tests(2-D, half- and full-models) or non-aeronautical test. These are central oxd wire struts, sling support ams turn tables, which gives more testing fiexibility to ILST.
Following the conducted test section calfbration with and without model ft 1988, ILST has been actively involved in supporting the development of the noifot2a/ aircraft industry (IPTN). Three main aircraft models, namely the configuration of basic and development of CN-235; the configuration of basic and development of N-250 aM also the pFeliminary design of N- 2130. Those have been carried out and occupying the activities at the ILST in the last 10 years.
In addition to that, several in house and cooperative research activities in conjunction with national and international research institutes, aircraft industries as well as university like IPTN, Fokker, BOEING, NLR-the Netherlands, NAL-Japan, TU Delft have also been conducted. This paper reviews the ILST activities within the last 10 years in operation.