Andy, let me suggest that you build a new, lighter rudder. The stock item weighs in at a hefty 80-90 grams so the balance weight amount you are quoting isn't surprising. The lighter rudder will require less balance weight and if you are careful in the build, you could come out with a balanced rudder weight to equal the stock part.
What I have generally done with larger third scale models is to balance about 2/3rds the weight of the surfaces, to save weight and reduce servo workload. Larger models require an addition of around 10-12 ozs to partially balance all surfaces this way, but the added weight is well spent.
The concept of partial balancing may be applied to pattern size, since weight is always a concern for us.
MattK
ORIGINAL: Andy P.
Hi Guy's,
I've just repaired the fuselage on my Impact and have reached the point where I need to re-fit the rudder. Has anyone experimented with static balancing on the rudder? Ive checked mine and it will require 80g in the forward mass balancer to balance the rudder on the hinge line. it has been explained to me that balancing the rudder will eliminate the further possibility of rudder flutter. I'm reluctant to add that much weight to the fuselage rear end but equally don't relish the thought of building a balsa replacement, any ideas?
All replies appreciated!
Andy.