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Spectrum Analyzer
https://www.spirit-system.com/phpBB3/viewtopic.php?f=20&t=3838
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Author:  Dano [ Wed 01. Apr 2020 23:49:57 ]
Post subject:  Spectrum Analyzer

Can someone please explain the difference in desired reading for bench test as described in the manual (main and tail blades removed) and in flight?

I run the Analyzer on the bench with all blades removed and I get very good readings in all 3 axis. Out of curiosity in flight I take snapshot of each x and y axis and see result has extreme vibration over 100. Heli seems to fly ok. Small occasional tail wag 1-2 inch. Should I be worried? I still need to capture Z axis in flight.

My thoughts are that on bench test without blades it shows very little vibes so I think my heli mechanics is good. Only possibility left would be main or tail blades? They are perfectly balanced (i think).

Any clarification would be appreciated.

Attachments:
File comment: Z Bench
z4.png
z4.png [ 49.44 KiB | Viewed 96 times ]
File comment: Y Bench
y4.png
y4.png [ 56.01 KiB | Viewed 96 times ]
File comment: X Bench
x4.png
x4.png [ 54.77 KiB | Viewed 96 times ]

Author:  Dano [ Wed 01. Apr 2020 23:57:31 ]
Post subject:  Re: Spectrum Analyzer

These are in flight captures...

Attachments:
y_in flight.png
y_in flight.png [ 74.64 KiB | Viewed 96 times ]
File comment: Over 100 on the left hand spike.
x_in flight.png
x_in flight.png [ 69.13 KiB | Viewed 96 times ]

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