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Rheobus
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 Posted: Sun 27. Dec 2015 17:26:30 |
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Joined: Sun 15. Feb 2015 19:48:05
Posts: 4
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hi
my goblin 770 wobbles at Head speeds below 1500 rpm in hovering.
over 1500 its ok, what can i do?
Greetings from Ingo
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ZeXx86
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Posted: Sun 27. Dec 2015 17:40:07 |
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Joined: Mon 29. Apr 2013 16:06:44
Posts: 12442
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Hi,
if there is DFC head, then it is unfortunately quite normal - DFC heads are not constructed for too low RPMs.
With normal rotor heads lower RPM is possible.
But it is always very important to make everything very symmetrical. In case of Goblin there is a problem when rotor blades are too tight. So making it more free will help.
You can also try to decrease Cyclic Gain. What is value of the Elevator Filter?
_________________
Spirit System developer
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Rheobus
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Posted: Sun 27. Dec 2015 17:49:38 |
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Joined: Sun 15. Feb 2015 19:48:05
Posts: 4
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thanks for help
no DFC Head, its a Competition with Sab 770 Blades
Elevator Filter ist 4
Cyclic Gain is 56
in the higher Head speed is Elevator Filter 3 and 2 and Cyclic Gain is 70 and 75
i tryd higher Elevator Filter and Cyclic Gain but the problem were bigger
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ZeXx86
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Posted: Tue 29. Dec 2015 8:38:37 |
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Joined: Mon 29. Apr 2013 16:06:44
Posts: 12442
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You can go with Cyclic Gain to 40% without any problem.
In the worst case you can go to the Advanced tab and temporarily try to decrease Geometry 6° value by 15-30.
_________________
Spirit System developer
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