Jet Stream 500
9
Guide to the Jet Stream 500
Loading a test model:
To load a test model, be sure the wind tunnel is stopped by pressing the
(enter) key
to return to 0 MPH. Then turn off the main power on the back of the control panel. Turn
the two test bed fasteners under the test area counterclockwise 1/4 turn each to drop the
test bed from the main wind tunnel. Be careful not to bend the pitot tube. Once the test
bed is cleared from the tunnel, you may attach the test model to the angle of attack arm
using the supplied T brackets. The best position to mount the model is in the center of the
test area (away from the walls of the test area). If the model is close to a clear test wall,
the wind effects will disrupt the results. Also, be sure the model is attached firmly or it
may vibrate or come loose from the arm, damaging the flow straightener behind the test
area. Once the model is in place, carefully reinsert the test bed back into the wind tunnel
and lock in place by turning the two fasteners 1/4 turn clockwise. Once secured, verify
that the model and test bed is properly aligned and locked in place before applying power
to the tunnel.
Important Note:
Be sure that while attaching the model you don't exert excessive force to
the arm or damage will result to the sensitive sensors in the test bed. If a sensor is
damaged, it must be returned to Interactive Instruments for repair.
Before starting a test:
Verify that the wind tunnel is properly setup (
see
Installation and Setup procedure
)
Be sure the test model is firmly attached to the test arm
Check to see that the test bed is inserted and locked into the test area
Set the desired angle of attack by adjusting the knob under the test bed
Make sure that everyone in the room is using proper ear protection
Turn on the wind tunnel's main power
Starting a test:
It would be best to let the tunnel warm up after powering the unit for a few minutes before
pressing the start button. This would allow the sensitive electronics to warm up and give
more accurate results. If the tunnel is very cold (below 60 degrees F), be sure to let the
tunnel warm up for at least 15 minutes (with the wind tunnel powered up but not
operating) to allow time to reach calibration temperature. Since the tunnel is calibrated in
room temperature between 70 to 80 degrees F, more accurate results will be obtained if
operation is limited to room temperature. Operation outside of this range may give
inaccurate wind speed and force measurements.
You are now ready to activate the wind tunnel:
Key in the desired wind speed value (in MPH or KPH) followed by
to activate the
wind tunnel fan. With the fan running other wind speed values can be entered as well.
The up/down keys will increase or decrease the wind speed in 5 MPH increments. You
may also hold the up or down key down and the wind speed will ramp up or down.
Note:
Whenever the wind speed is at 0 MPH, the lift and drag forces are automatically
set to zero. This is to compensate for the weight of the model under test.
