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Old Jun 07, 2015, 08:55 PM
gainey is offline
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phantom fx-61 cg help please

Hi everyone
I have the fx-61, I am using the arkbird auto pilot, gopro on the nose with board camera, 4500mah battery.
for some reason I just cannot get the cg right, when I fly in gyro mode I have to constantly hold up elevator, in low flight I have to do the same, I just cant seem to get it spot on.
How do I set a wing, should the elevators be level with the main body?
I have attached a picture with two black lines above the main spar to show my cg points (the cg is right on the spar I believe)
can any help please
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Old Jun 09, 2015, 05:56 AM
giteart is offline
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Greece, Attica, Ellinikon
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C.G. should be at the spar or 3~5mm front of the spar. Don't go behind the spar.
Elevons level.

For more help visit this thread here
http://www.rcgroups.com/forums/showt...25904&page=423
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Old Jun 11, 2015, 06:11 PM
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All wings tend to be nose heavy and require some "reflex" or elevator up trim for level flight. Here's how I trim my wings:
1. Balance the plane such that it is slightly nose heavy when held at the spar - just slight, not a whole lot or you will have problems trimming the plane
2. On ground adjust elevator such that with stick at neutral elevons are deflected ~3/16" upwards. It is crucial to have exact same amount of deflection in both elevons or it will create roll on the plane during flight.
3. During flight up/down trim elevator for level flight at cruise throttle setting
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Old Jun 18, 2015, 06:59 AM
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thanks I will try it
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Old Jul 03, 2015, 07:47 AM
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Mine is set for the spar "exactly"! I actually hang mine by a string when everything is inside & RTF, then I rest the cover do its in its general position.

This is how I fly it & it's one of the best platforms EVER, especially using the vector FC

You can see I had to add a half ounce of weight on each side & I'm using the suggested 3s 4500 mah & a cobra motor due to the stock motor giving a ton of vibration
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