Abstract :
In the Aerodynamics laboratory at the Adisutjipto College of Technology, the wind
tunnel mass measuring instrument only uses an ordinary digital scale. So to facilitate reading
in the wind tunnel, a tools is built using a load cell sensor and with digital readings that have
been converted from mass to force. This data reading system is connected to an LCD as a
display in monitoring the resulting speed changes.
By using the data collection method, and also after performing tool calibration and
testing with ordinary digital scales, results were found by using the NACA 4412 airfoil test
object and by testing where there were different angle of attack.
From the results, it can be concluded that measurements made at different angle of
attack have different values even with the same wind speed. This happens because there are
several factors, and the error factor that the wind tunnel has in the Aerodynamics Laboratory
of the Adisutjipto College of Technology reaches an average of 3.6%.