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T-REX 600 › Tail Wag- Please Read 1st post First
08-12-2007 06:14 PM  10 years agoPost 1
ArtK

rrVeteran

Temecula, Ca

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These are observations about tail wagging of the Align 600E and N with the thrusted T/R grips. I am writing this because I know the frustration and I hope it helps.

1. After trying every possible gyro, link, tape configuration the only thing that stopped the wag was replacing the thrusted T/R grips. I believe it is something to do with them binding at high speed. Don't know for sure because I can't get inside the T/R grips to see this. I just received this tip from others on this forum and Andy from Align replaced the grips for me and it solved the problem.

2. It is rarely a Gyro Issue.
a. Mounting Tape rarely influences this. Thin or thick it should not wag because of tape. I have seen 401's, 611, 6100 all wag not due to mounting tape issues. Thick, thin etc. Some guys use the stock thick tape, others double the tape, some use the 3m thin heavy duty mounting tape. - All works on a properly functioning helicopter. Even my 600N which initially had terrible vibration problems still held the tail rock solid with one piece of thin 3m tape on my 611. So I am skeptical that vibes will affect a high-end gyro as much as people think.

b. If the gyro does cause wag it is most likely due to gain and this is easily fixed by decreasing gain or moving the link closer in on the servo. Multiple combinations of gain and servo arm length work without a problem. If you reduce gain to much you loose T/R control which means its not the gyro. I have never had a problem making any gyro work on a properly functioning helicopter. Higher servo voltage also affects gain requiring less with more volts. But as I said you should be able to lower the gain not much lower then 30% on most gyro's and the tail should hold. If not you have to increase the gain and if the tail wags it has to be something else.

3. Sometimes it is an electric motor issue. I did observe using a different timing setting on higher voltage 4s and 8s setups for my micro and 600E greatly affected the twitchiness of the tail. By using a lower timing I was able to eliminate this.

4. Rotor RPM effects gain. Increase RPM requires a decrease in gain. (More thrust from the tail with less pitch) and vice versa.

I hope this helps. Please do not go off topic with this post. I am putting it out there for people to read and I don’t want this diluted with Align bashing etc people will loose track of trying to solve the problem.

Thanks,
Art K.
PM me if you have any questions.

The best way to get over it is to take responsibility for it.

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