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HomeAircraftHelicopterHelicopter Main Discussion › Tail wag help 3G
10-14-2012 08:26 AM  6 years agoPost 21
quakermaas

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Munich, Germany

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Make sure you test the 550E with the 3G unit set to small helicopter

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10-14-2012 01:12 PM  6 years agoPost 22
HeliNutAndy

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worcester, MA USA

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Make sure you test the 550E with the 3G unit set to small helicopter
Thank you for the suggestion. I am going to give it a try today. It is raining currently which is supposed to clear up and then the wind is supposed to take over for the day.

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10-14-2012 01:56 PM  6 years agoPost 23
icanfly

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ontario

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I've found too much gain on a gyro, teeth on the tail drive gears missing and or damaged, loose belt, teeth missing from the belt, sticky tail pitch slider, all culprits of tail waggle.

It is recommended to spray a bit of silicone into the tail boom.

looks like a loose tail belt, had the same problem with mine. Check the belt tension after every flight if it has stretched, assuming you have a belt driven tail.

Is your headspeed way to high?

Like the 550.

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10-14-2012 02:15 PM  6 years agoPost 24
HeliNutAndy

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worcester, MA USA

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The heli has a torque tube and the gears are new, straight, and do not have any missing teeth. I am running a throttle curve of 0-75-80-85-90 so the head speed should not be too high. The slider moves freely as well so I am at a loss at the moment. I'm hoping that the suggestion that quakermaas has given resolves the issue and thank you for the help.

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10-14-2012 02:25 PM  6 years agoPost 25
HeliNutAndy

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worcester, MA USA

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I found this useful bit of information that I am going to play around with:

The delay function is used to prevent “hunting” of the tail rotor. If the delay is too small, the tail rotor may “wag” back and forth. Increase the delay setting to eliminate it. It’s best to keep the delay as low as possible without the tail hunting. Hold the set button for two seconds to enter programming mode and then press the set again multiple times to reach the ‘delay’ LED. When the status LED is green, the gyro is optimized for larger helicopters, defined in the manual as 425mm blade size and up. When the status light is red, it’s optimized for smaller helicopters using 325mm blades or less. Use the rudder stick to toggle between these two modes. The delay setting will be increased the further you push the rudder stick off center. The delay LED will start flashing to indicate a zero-percent delay setting. Full deflection of the rudder stick gives a 100-percent delay. Lock in and set the delay by holding the rudder stick at the desired delay setting and then press the set button.

Courtesy of Helipilotonline.com/500007

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10-14-2012 08:35 PM  6 years agoPost 26
quakermaas

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Munich, Germany

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Another thing I should point out, if you are using the ESC that came with the 550E two years ago, you should keep the throttle curve high and as straight as possible.
From memory of reading forums at that time, the ESC does NOT have smooth throttle steps/curve, which can cause the tail to kick a little.

I use for 550E
Normal 0-92.5-95-100
Idle up one 100-95-100
Idle up two 100-95-100

If that seems a little high for now, maybe use

Normal 0-85-90
Idle up one 95-95-95
Idle up two 100-95-100

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10-14-2012 09:03 PM  6 years agoPost 27
HeliNutAndy

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worcester, MA USA

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I just came back from flying and setting the 3G to "small helicopter" fixed the wag issue. It is very windy here and the tail held strong using 65% gain. Thank you quakermaas and everyone else that helped. Now that I am comfortable with the Helicopter I am going to up the throttle curve to avoid any esc issues if possible and I may get another pinion gear to stretch my flight times a bit.

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10-14-2012 09:50 PM  6 years agoPost 28
quakermaas

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Munich, Germany

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Good to hear it is running better and glad to be of help.

It was a well known issue when the 550E 3G was released, I am still happily flying mine, with the same setting from two years ago and no crashes yet

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