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Old 05-07-2012, 05:58 PM   #1
supertoyz
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Location: Colchester, VT
Default Also having issues with tail wag...any idea's?

I just swapped out the BeastX on my Trex 500 with a GT5 and can't get the tail to stop wagging. The heli was built as a FB heli with a 401 and 9257 servo, it flew great. I converted it to FBL with a Microheli head and BeastX last year. It flew great right off the bench so I'm 99% sure it's not a mechanical issue. I'm converting my Trex 250 to FBL and wanted to try a GT5 which wouldn't work on the 250 so I decided to swap out the BeastX on the 500 to use on the 250. I installed and setup the GT5 according to the directions (not sure they should be called that) and took it outside for a test hover at 60% global gain. Overall it seemed ok but had a tail wag and bounce back when stopping hard. I also noticed that the tail would rotate a little at liftoff and also rotate when flipping throttle hold to land. I assumed it was from too low a gain. I then setup the flight modes with gain settings of N-60 / ST1 - 80 / ST2 - 100 / H 60 to try, I was able to get to 100 with no problems however it had no effect on the tail wag. I then started bumping P & I, I've tried P from 20 to 90, at 90 it stopped any noticeable bounce back, it seems to piro and stop ok but still wags. I've also played with I from 20-80 with no change. I tried deadband from 0-30 with no change. I tried the presets they have in the instructions for both the X50 and E720 with no luck. On spool up and initial lift off it seems ok but as soon as the blades are up to full speed it starts wagging. On a hard climbout the tail wags harder on the start and end of the collective inputs. If I could figure out how to get the tail in rate mode I'd try setting the tail to be neutral mechanically to see if that helps. I did confirm that for the global gain setting I do have white numerals on black background instead of the opposite, although the setting above it is black on white background. I'm not sure what that readout is. According to servodatabase.com and the beastx servo info page all of the servo's have the correct settings (DS510's and 9257) I'm kind of stumped because I think I've tried about everything and can't seem to get any change in the wag, no better, no worse. Any idea's?

Last edited by supertoyz; 05-07-2012 at 09:15 PM..
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Old 05-08-2012, 10:50 AM   #2
ady
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my prevent mine from wagging , i turned off the D-sense on the tail , in the GT5 unit
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Old 05-08-2012, 08:03 PM   #3
supertoyz
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That solved it.......one of the settings the instructions say shouldn't need to be changed, go figure

Thanks for the help
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Old 05-09-2012, 11:27 AM   #4
ady
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nice one chap , glad it worked out , and the them instructions are rubbish ain`t they
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