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Force measurements

We have an aerodynamic balance in the lab specifically designed for the Lund wind tunnel. The balance measures lift, drag and pitch moment at a resolution of 0.005 N.

The forces are measured by three Kistler 9207 quartz force sensors, to measure drag, lift and pitch moment. Each sensor is connected to a Kistler 5037B3 three channel amplifier which is fed with 15 V from an Instek GPS-4303 DC power supply. The amplifier provides a -10 to 10 V force-relative output. The maximum range of force on each sensor is ±5 N. The amplifier is connected to an Advantech PCI-1710 PC Lab-card in a stand-alone personal computer. The input values are read and interpreted by custom built programs created in Matlab.

The balance consists of a metric table that is directly mounted on the force transducers. On the metric table a sting is mounted with a holder of models for measurement at its upper end. The holder allows different angles of attack to be investigated with an easy adjustment.

Page Manager:
Stuffed swift

Equipment in the Lund Wind Tunnel
The drag of a stuffed swift body has been, among other things, measured using the aerodynamic balance.

Contact information

Anders Hedenström
Professor, KVA Research Fellow
Evolutionary ecology

Telephone: +46 46-222 41 42
E-mail: Anders [dot] Hedenstrom [at] biol [dot] lu [dot] se

Per Henningsson
Evolutionary ecology

Phone: +46 46-222 48 29
E-mail: Per [dot] Henningsson [at] biol [dot] lu [dot] se