ORIGINAL: Gray Beard
ORIGINAL: bikerbc
For 1/4 scale I use HS-755HB's with karbonite gears and for 40 60 size planes I use HS-635HB's with karbonite gears...I dont care for metal gears because they are noisy and they wear faster . And I dont need digital. My radio will do almost everything that a digital can do for the kind of flying I do..Digitals use more power. And I have been told that digitals dont play nice with analogs and you arent supposed mix them..I have mixed them with no problems but dont any more just in case...So I stay away from digitals..
Carbonite gears are brittle and strip easily on planes with big control surfaces on things like a hard landing or vibration from some engines. Hitec does not recommend them for gas powered use at all. Hitec also says not to use them on giant scale planes. I have had to replace the gear trains on some 6985s I have that were used on ailerons of an 80 inch gasser. Big ailerons, brittle gears. I do like the servos though but these days I prefer different gear trains.
I just have to agree with Gray Beard.
All devices that I know using gears that work hardhave lubricated metal gears.
The gears in the servos are greased and should preferably be metal.
Think about the gears in the transmission and differential of your vehicle.
Of course if a servo manufacturer use plastic or other material to save cost and meet competition low prices they have to find some way of claiming some advantages. I think it is only a sales' argument.
Give me metal any time for precision, durability and reliability.
Zor