I was planning to use a HS-5625 servo in a pull-pull configuration for rudder control on my Futana 90. As I read more about this setup, i'm starting to get discouraged about using it due to reports of servo burnout and high current draw due to the pull-pull wires being too tight. Is it really that difficult to achieve the correct tension on this setup. You can't err on the loose side due to the danger of excessive slop and resultant flutter potential. Is it sufficient to go just tight enough so that the servo doesn't buzz at neutral or do I really need to go to the trouble of buying a servo programmer and hooking up an ammeter to assure that there is no abnormal current draw when the rudder servo is in the neutral position?

Although I have not used many pull-pull setups I have a few and have never had any problems at all with them. I have two in use and am setting up my third pull-pull on a 30cc which I have not completed. I plan to have it ready in a few weeks.

For the last two years I have had a pull-pull on an AW Extra 260 60-90 and have bashed the plane pretty hard and not once any issues. Maybe the ones that have had problems are not setting it up properly. I have never used an amp meter or anything for mine. I do have a slight bit of slack just so that if you press the rudder to one side or the other the slack is immediately gone. I don't have them so tight that they put undue pressure on the servo or rudder.

Maybe some others will chime in on this subject and bring some more info to the table.