I don't think there's a rule in IMAC regarding push pull pull pull


only thing i don't like about push pull with ( servro's on one side ) is it seem's the end points are never equall if you max them out




for 3d flying I'd say main question is center of gravity ( if your puting weight in the tail and having your servro under the canapee then that's somthing you could change )

just wondering how big of plane are we talking here 3 servro's on the rudder ??? i think that older servo's that's the way it was but now i day's i dont think so


like for example 3 8911's on lion's would be over kill for a 40% plane i think if you had enough force on the rudder for blow back with that set up the rudder would physical fail before the servo's blow back

for IMAC i think they want the whatever set up has the most resloution at the center point and toqure with the least amount of Fade . the 3d guy probly doesn't care about center point resllution

the popluar set up i see is push pull two servo's miorring eachother mounted under the horizontal Stab .. note that you should use singlechannl's and end point's for each rudder servo if mirrored and you'll have to reverse one of the channal's mechaincaly or inside the radio

main thing you don't want end point's fighting eachother and cuaseing exessive load you could burn up a servo or get some nasty binding

another option is the two servo's and a joinig rod on one single side