Why are so many people making such a big deal on the BobCat rudder/gyro set up ?

The answer is dead simple, use 9411s (just like I recommended in my RCJI review of the Bobcat ) and a piezo gyro set at 50 % gear down and 0 % gear up. Problem solved. Fly it, enjoy it.

Using 3421s is asking just too much of a very good but dinky servo. High frequency reversals of travel, as commanded by the gyro, are obviously hammering this little unit and its throwing in the towel.

9411s are just a LITTLE heavier, just a LITTLE bit larger and a lot more powerful than 3421s. There is no downside to using the 9411s they dont even cost much more and balance is not an issue, at least it isnt on my RAM 500 BobCat. which balances right on the mark with no ballast.

Glad to see that although BV disagreed with my recommendation for 9411s he is now endorsing their use.

My next BoBcat will also have bigger servos on the stab. too. The recommended servos are probably OK but a reserve of power is no bad thing on this or any other high speed model. The need for more than just ample flight control power was learned on the early full size jets, sometimes the hard way, over 50 years ago.
BRG,
David gladwin