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Skookum Robotics Skookum Robotics SK-360 SK-540 & SK-720 Digital Flybar

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Old 02-03-2018, 02:36 PM   #1 (permalink)
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Default SK720 Vibration Testing

I am trying to track down a vibration on a Trex 600L and was wondering if it is okay to test by running the heli up on the ground or is it preferable to have the heli in a hover?

I have also included two log files.

Attached Files
File Type: skv Log1_All Blades Ground Runup.SKV (477.5 KB, 6 views)
File Type: skv Log2_All Blades Hover.SKV (713.5 KB, 7 views)
Trex 600L--Goblin 420--Trex 760x--Synergy 516--Synergy N7

Last edited by sawacs; 02-03-2018 at 05:32 PM..
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Old 02-04-2018, 10:14 AM   #2 (permalink)
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For a cleaner vibe analysis, you need to be in the air.
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Old 02-04-2018, 02:12 PM   #3 (permalink)
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I agree, however it is easily done on the ground or table. Blades off to start, and any soft pad underneath it. I always vibe test mine on the coffee table before it ever sees free air.
The first log, logged a bad take. The second looks like a tail issue? But? What head speed are you pushing? I can usually tell by seeing the head on the log, but yours is either superbly setup, or the back ground 'noise' is overshadowing the head.

There is alot of fairly high overall back ground vibes being shown on the logs which cloud the issue. What kind of tape or foam are you running under the Skook?
If it can be done wrong, I will find a way to excel at it.
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