ORIGINAL: Mastertech
I agree on the Y with bearings through the fuse being the best overall. But the twin servos in the tail are the stiffest as far as linkage goes.
The one I had fail was on a YS powered bird. Electrics don't have that vibration. When I had that happen on my YS powered ship I replaced the twin servos with a Y push rod and bearings on the push rods where they exit the fuse. Rock solid system.
Tim
Mastertech.
I do show a single lever single pushrod system, the system has nothing to do with any Y with bearings. People often do have a surge to make things impressive and needless complicated. We are not making a steam engines.
Because you did make a summery I did show the system because it is forgotten. The principle of this system is more than 50 years old and used by pilots in the period they also were engineer, applied in the most famous classic pattern planes of the USA. Astro Hog, Smog Hog, Orion , Taurus etc.
Only challenge is, you have to make the system yourself, but when made it is the best system you can have. Stiffness of the (wood of the) elevator halves is a problem and not this system. Do a test with your own plane and add a weight with the use of strong tape on the TE of the elevator halves generating a total torque of 8,8 kgf cm = 7,6 pound force inch total and check deformation left and right. When you see a difference the plane fails in contruction and during flight IMO.
I did not tell another pro of this system.
The single main pivot bearing of the pushrod is encapsulated in the fuselage, protected against rainwater and dust just as the crankpin bearing is protected in the crankcase of the glow engine. When made with the right plain bearing material and dimensions this system holds its accuracy for many many hundreds of flights.
Cees