Today is Sunday and the conditions are useless again for flying.
So its back into "Shut That Noise Up" project...
In this post 181's air box is getting analysed for harmonic resonance. The test
passes frequencies from 1hz to 20,000hz through the 1.5mm fibreglass component
to see where points of dynamic distortion will be at specific frequencies; blue
is zero red is maximum.
Four frequencies were isolated from the pack to review what is going on at 3600
/ 4000 / 5200 / 5600 rpm. The data provided correlates to where the air box body
is "resonating" at specific rpm. The purpose of this is to identify focused
points of resonance that can be individually attenuated as opposed to wrapping
the entire box.... image order correlates to rpm list above.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=510500#510500
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