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Re: Goblin 380 3 bladed head help
Posted: Sat 23. Jan 2016 19:48:03
by ZeXx86
Cyclic gain should be reduced little bit for 3-bladed rotor heads (by 10-20%), but in some cases it will fly even with same.
Wrong cyclic gain will rather cause some sort of oscillations (too high) or lower precision/instability (too low gain).
Re: Goblin 380 3 bladed head help
Posted: Sat 23. Jan 2016 20:20:55
by ZeXx86
Regarding the governor - if it is not configured properly, performance can be affected too.
Especially rudder may not hold very well.
If this is the case, then inprecise rudder can be reason for the cyclic issue.
Lastly, if vibrations are very, very high (especially on the rudder), it can cause that the helicopter is not flying precisely.
But I think that this is not the case, since you just swapped the rotor head.
Re: Goblin 380 3 bladed head help
Posted: Sat 23. Jan 2016 23:32:11
by Coco66
According to SAB you should reduce your cyclic gain of AT LEAST 30% (you did 13%, 58 to 50).
http://www.goblin-helicopter.com/shop/m ... 0640-K.pdf
Re: Goblin 380 3 bladed head help
Posted: Sat 23. Jan 2016 23:59:59
by Rcpassa
They say 30 percent on vbar. It varies with different systems.
Re: Goblin 380 3 bladed head help
Posted: Sun 24. Jan 2016 0:00:56
by Rcpassa
It looks like a problem with one servo. It's working great after the servo was addressed
Re: Goblin 380 3 bladed head help
Posted: Mon 25. Jan 2016 9:29:39
by ZeXx86
Perfect, thanks for the info.