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In our previous tests we have shown that ultrasound interference is an issue (here and here) and that suspending the detector away from the engine is difficult (here, here, and here). One way to beat this problem is to turn off the engine and glide. If we take this approach then the detector rig can be mounted on the aircraft directly. A couple of things to consider:
We then placed Velcro strips on either side of the plane where we are going to attach the detector and recorder, and on the devices. This makes it easy to attach and remove the devices. First we found the center of gravity and marked it on the side of the plane 'CG' The detector and recorder fitted on really nicely to the Velcro which seemed pretty secure. To make sure that these don't fall off we put the lanyards around the pins that secured the wings, when the wings are in place this means there is no way they can fall off even if the Velcro fails. Next up we'll try testing the rig in flight and seeing if we can record some ultrasound!
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March 2017
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