Originally Posted by rmdhawaii
The big question is still the servo position. What performance issue are they addressing by making this change? Is it a throttle/brake issue? That existing servo guard is somewhat of a nuissance. It can't be CG, because that would have been worked out during initial development - or one would at least think so.
CG's, centeralisation have all been mentioned. The trade off between the lower CG and the heavier part of the server sitting out are approximately the same. AFM is on the right path i believe but just didnt see the complete picture.
On the laydown version the heavier section of the servo sits higher and further out. Just moving the heavier section inwards helps a little with the roll change. But standing the servo up also puts the heavier area right down on the chassis so the CG is slightly lower than it would be with the laydown servo and the mass weight is closer to the centerline. Improvement on both areas if even only marginal.
Laydown is only an advantage on the steering servo as the heavy section is moved a considerable amount lower. The heavier section might be moved further out but this will help with balancing against the position of the engine and pipe.