Getting tailwag in inverted backwards flying - HeliFreak
Fun, Learning, Friendship and Mutual Respect START  HERE

Go Back   HeliFreak > R/C Helicopter Support > 500 Class Electric Helicopters

500 Class Electric Helicopters 500 Class Electric Helicopters manufactured by Align, Tarot, SYMA, Airhog, Chaos, HK and similar.

LinkBack Thread Tools Display Modes
Old 12-10-2008, 11:16 AM   #1 (permalink)
Registered Users
Posts: 91

Join Date: Jan 2008
Location: Sweden, Stockholm
Default Getting tailwag in inverted backwards flying


Im been having a problem with my Trex 500 for couple of months now. The problem is that I get tailwag when I do maneuvers like Hurricane and Funnels. I tried to lower the gain but the problem is still there. I have lowerd the gain untill the tail dos not hold.

Of course I have checked all bearings and the mechanics. No play at all. I use the tourque tube.

One of the strange things is that the problem is not always the same. Sometimes I only get wag in inverted backwards flying and some other times I get it even in hovering. If I get wag in hover, it helps to unplug the battery and replug it. Then it is better again.

I use a Solid-G gyro and a JR8900G servo and Spektrum DX6i transmitter. I have tried diffrent servos but I still got the problem. I have also tried diffrent tailblades and the best so for is Align carbon blades.

Any ideas?

Best regards
Daniel, Stockholm Sweden
Daniel tengvall is offline        Reply With Quote Quick reply to this message
Sponsored Links
Old 12-10-2008, 11:30 AM   #2 (permalink)
Team Taco VP
Posts: 34,492
My HF Map location
Join Date: Nov 2005
Location: Stanton, Ca. USA

Could be many things. Have you tried changing the ball position on the servo arm? I notice that if you are too far out the loss in servo resolution can cause steppy piros and wag in turns especially backwards. also the gain setting is touchy! 2 clicks either way can make a big difference. Make sure to use end point adjustment rather than the gyro menu. Reason is using end points the gain setting has more resolution or steps and thus finer gain control.

Also if you setup for rate mode (which the solid G doesn't have) go back and just 90 the servo arm and center the slider travel.

Finally noise! My Solid-G on my 500 had a noise problem. It was the BEC in my ESC and it caused a wag. A replacement ESC fixed this but the point is make sure you have no servo wires, motor stuff, etc near the gyro wires. Don't bundle them up together.

Finless is offline        Reply With Quote Quick reply to this message

Quick Reply

Register Now

In order to be able to post messages on the HeliFreak forums, you must first register.
Please enter your desired user name, your REAL and WORKING email address and other required details in the form below.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself. Use a real email address or you will not be granted access to the site. Thank you.
Email Address:
Where do you live? ie: Country, State, City or General Geographic Location please.
Name and Lastname
Enter name and last name here. (This information is not shown to the general public. Optional)
Helicopter #1
Enter Helicopter #1 type and equipment.
Please select your insurance company (Optional)
Helicopter #2
Enter Helicopter #2 type and equipment.
Helicopter #3
Enter Helicopter #3 type and equipment.
Helicopter #4
Enter Helicopter #4 type and equipment.


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Copyright © VerticalScope Inc. All rights reserved.

SEO by vBSEO 3.6.1