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twitchy bird

Old 08-28-2015, 03:01 PM
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rt3232
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Default twitchy bird

Been flying a HOG electric and it has became twitchy after some hard landings and cartwheels, So I have replaced the servo's with metal gear ones, as I found some missing teeth.

On the bench I can operate it with no problems for up to 6 min. and nothing. But in the air it changes trim's all most as fast as I can set them. receiver green lite stays on and solid


So any suggestions


Cheers Bob T
Old 08-28-2015, 04:47 PM
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Not all servos center very well. Some of the metal geared [steel] servos I have seen have too much slop in the gear train and don't want to center at all.
Old 08-28-2015, 05:54 PM
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rt3232
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Gary I hear you but I have marked center and operated just the servos and they come back to with in the width of a fine line pen mark, and the holes in the surface arms are tight, no slop at all. and I should have said this bird is a
wild Hog delta wing thingy lots of fun when right.

This is my first electric so I don't know much about possible problems with the ESC, having done the cartwheels, and flop landings. The receiver is mounted on foam, I am using a fast receiver and at present the 2 antennas are run parallel to the servo leads about a 80 deg angel between them so I am going to change that, and may be go to the under surface of the wing, as it might be signal interference

I don't think flutter could be a problem as it only flies at an estimated about 40 to 60 mph

Cheers Bob T
Old 08-29-2015, 12:29 PM
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Hi!
Have you checked all flying surfaces so that they do not flex. If you push on, let's say the elevator it should be quite stiff.
Old 08-29-2015, 12:37 PM
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rt3232
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Hi jaka

Been there and done all that made the above changes and it helped but it is still twitchy, So I will replace the receiver and see how that goes

Cheers Bob T
Old 08-30-2015, 04:09 AM
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Are you using Sullivan golden rods on the controls, if so the outer tube may have come unglued. And explain the trim issue
Old 08-30-2015, 01:01 PM
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Hi jetmech

on Wild Hog you use tempered wire inside a tube it's a delta thingy. Going with a new receiver.

Cheers Bob T
Old 08-31-2015, 04:54 AM
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Check the outer tube.
Old 08-31-2015, 11:58 AM
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rt3232
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jetmech

I hear you, But they are held in place by heat shrink on both ends no rattle or movement, got a new receiver ordered, now my days off are messed up so will not get a chance to do any thing till next week.

Thanks guys for all of your comments

Cheers Bob T

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