Leif Elite Veteran Location: Oxford, PA - USA
My Posts This: Topic Forum | I did a chinese weight mod on the tail of my Evos, but I'm running with the Freya tail hub/grips. For the standard Evo grips, it's probably easiest to just run a long blade bolt with extra nuts for additional weight.
See the linked thread for details on the modification: http://www.runryder.com/helicopter/t434993p1/
The purpose of the chinese weight mod is to reduce the tendency of the tail blades to "center". The centering force of the tail is actually quite strong and causes a significant amount of resistance for the tail servo to work against. With the chinese weights, the tail servo doesn't need to work as hard and you can run with much lower gyro gain.
This version of the modification does not completely eliminate the centering tendency, but it does reduce the load on the tail servo by quite a bit.
Leif |