380/420 Goblin 380 pitch

Scottymize

Scottymize

New Member
Having issues getting equal pitch up and down. Perfect 0 degrees at mid stick. about 2 degrees different from top to bottom. Any idea's? servo ball placement? Manual calls for 13-15 mm out from shaft. Mine are at 13. Thoughts?
 
:welcome1:to the forum. Can you provide some more info like what kind of electronics you have on this bird :).
 
D.O.G. said:
:welcome1:to the forum. Can you provide some more info like what kind of electronics you have on this bird :).
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Hi!. Thanks for the Welcome!. Goblin 380, IKON 2, BK3001HV servos on cyclic. Setup on Spektrum DX9. Heli has Quantum motor with Castle Edge 75 ESC.
 
The first thing I would check, is that your servos are all properly centered. If they are off a little, it could cause unequal pitch. I don`t know if IKON has this feature. But in Bavarian demon, you can make slight adjustments in the transmitter`s end point for pitch to equal it out (provided it`s only a degree or two) without changing the mid stick zero.

We really do need a little more information though, to be able to pinpoint the issue for you. But the first place I would start, is checking the servo centering.
 
I believe I have pinpointed the issue. I will test fly today and update. Post a couple pics as well to explain. It seems I had forgotten the very basic principal of heli setup. LEVEL the helicopter. From the start, I never liked the Goblin 380 landing "feet" on the back. I wanted a more conventional landing gear setup . I installed a set of aftermarket landing gear on the bird. The landing gear has a more tail high, nose down stance. I setup the heli on the bench this morning and leveled out the main shaft. (about a 1/4" block under the front of the landing gear.) I went through the setup again and I am within .4 degrees of equal pitch and cyclic. I had tried moving the servo balls in one hole and out one hole and no change. besides, the geometry just looked all wrong dong that, but I had to try. I put them back where they originally were. Everything looks very close now so I will give it a try. I'll update this afternoon.

Thank you for all your input!
 
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