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Low Head Speed Helicopters Low Head Speed Helicopter Setups and Flying info


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Old 11-02-2016, 09:45 PM   #1
technut
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Default LHS HEAD SHAKE

My Trex 700 e flybar shakes at LHS. Is this because of hard head dampners or mains being too tight. Doesn't shake at higher speeds. I know someone has the answer!
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Old 11-03-2016, 05:36 AM   #2
trillian
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It can sometimes be due to the blades being tight. It can also be the swash gain in your FBL unit. I have had the occasional wobble in a hover and cured it by lowering the gain a bit.
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Old 11-05-2016, 05:10 PM   #3
im4711
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I noticed that hard dampers do not do to well for low rpm. So maybe you want to play with softer dampers.

also -> for the blades run it initial spool up a bit higher so they straighten out and than go to the low rpm. If blades are to loose you can easy run into issues where under harder collective input they fold back and ... boooooom

I have been there already.
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Old 11-05-2016, 09:01 PM   #4
Dennis P
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Being that you are flybarred I would guess that they may be to hard but I have also found if they are not greased up well this can happen. I really try and have them lubed up well for lower headspeed stuff and it helps a lot .
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Old 11-09-2016, 04:20 PM   #5
technut
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TY for all the suggestions. I'm installing the red dampners and recheck everything else. Will let yall know results
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Old 11-14-2016, 09:47 PM   #6
technut
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Greased up red dampners and installed. Checked main blade tightness and flew her. No more head shake. TY to all who helped!!!
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