Originally Posted by Flybye Steve

If you have to use a pull pull system, I would advise you use dmcquinn solution. A lose cable has the potential to cause "Flutter". Flutter=disaster.

of the seventeen 25 to 40 percent 3D planes I have assembled and flown over the past 16 years, exactly ZERO of them had tight cables beyond 5'ish degrees of rudder travel....

Zero have had a rudder flutter problem!

Cables need to be tight around neutral....

Aero-forces keep tension on the "Pulling" cable past only a few degrees of deflection.

Mith, this is well established. Surprising that people still comment about a loose cable causing doom.

Originally Posted by VinceY

Mith, this is well established. Surprising that people still comment about a loose cable causing doom.

OOOpsie!! my bad... I promise.. I won't say another word on it!!

Offset servo arms are normally for criss crossed cables and straight arms are for straight cables. If the servo arm is 4 inches, the control horn needs to be 4 inches as well. As the Mith says, the slack on the non pulling cable during rudder deflection is not an issue.

Originally Posted by dmcquinn

I wrote a windows program that may help with rudder pull-pull geometry issues. Free. Runs on Windows 7 or higher.

https://drive.google.com/drive/folde...Ge?usp=sharing

David,

I've been using your pull pull software program for years. You should be nominated for the Noble Peace Prize in science for this.

Thanks - J Tab

Originally Posted by Jaketab

David,

I've been using your pull pull software program for years. You should be nominated for the Noble Peace Prize in science for this.

Thanks - J Tab

This comment made my day!

Pushing a limp noodle is a lost cause.