ORIGINAL: JohnMac

[X(] Hey guys, I do not wish to be the harbinger of doom but the 3301 is suspect in my opinion. This is a servo made by Hitec for glider wings. We had a guy loose a SM Hawk earlier this year due to one of these servos failing. The gearbox stripped. Now I don't know if they put a better gear set in for JR but the gears in this Hitec servo appeared to be aluminium. The servo being stripped caused the rudder to flutter so violently that the fin integrity was lost and with no directional stability, the model was lost. My club has now banned this servo for jet control surfaces. BTW this was the Hawks 1st flight and built by a guy who builds real aeroplanes, his installation was excellent. It was also scrutinised by two other pilots as is our club protocol and it was found to be fine, so we are sure that the servo was the cause, not the effect.
We are now using the Multiplex slimstar servo in very slim space applications. The output arm on this servo needs beefing up as it is flimsy but with that done it works well and we have a couple of Hawks flying with this arrangment. This servo has Brass gears.
Regards,

John.