More throw needed on U CAN DO 60
 

How far can I choke up on tail horns ( rudder and elevator) and not risk flutter.
I am using the long stock servo arms and control horns. With 4 40 rods and heavy connectors .

RE: More throw needed on U CAN DO 60
 

You will probably need to buy the larger dubro super strength servo arms to get the throws that you want.

RE: More throw needed on U CAN DO 60
 

OK <div>I wish Great Planes would think about 3 D when they supply you with 2 56 stuff .</div>

RE: More throw needed on U CAN DO 60
 

Glue a carbon or brass tube over the 2-56 and it works ok.

RE: More throw needed on U CAN DO 60
 

like delman said you need longer arms. One more thing you could do is drill a new hole in the horn that is lower. If you do not have the clearance to do that then you will need new arms.

RE: More throw needed on U CAN DO 60
 

I would not move in more than ¾ of an inch in on the horn and 1.0 inch or 1.25 on the servo. Best is 1 " servo to 1" surface. If you have flown the UCD and think you need more throws than what the manual states I would check the CG. My UCD’s CG is 6 inches back from LE (move the CG back ¼ inch at a time until it handles the way you want). My plane will turn on itself at slow speed with all surfaces 45 degrees. I use 4/40 Central Hobby carbon push rods and Sullivan steel horns and Dubro servo arms. I also hard point the sufaces with a wood dowel and the horn / screws will not crush the soft wood.