I was wondering, the instruction manual for my Kyosho GeeBee-Z calls for one full-size servo to operate the elevator, which is supposed to be connected in the middle by a " [ " shaped connector. Instead, I decided to put separate control horns on the right and left elevators and have them controlled directly.

I have two options for controlling the elevators

1. I can use a regular-sized servo, mounted in the middle of the fuselage, with a long control rod that forks at the end.

or...

2. I can use two mini servos, mounted near the rear of the fuselage. Each of these servos would operate an elevator half. I figured that since each servo is only controlling a half of the elevator, the two together would be strong enough. Or, is one full-size servo stronger than two mini-size servos together?

What would be the advantages and disadvantages of each method?

Hiya,
I would recommend using one standard or better servo up near the CG and use a pushrod with a Y for the elevators. The GeeBee has short moments and you don't want to move weight to the tail. Besides, the mini servos are really meant for mini-planes (park flyers or very small glow) and their gear trains have very small teeth that would strip if subjected to high flight loads. Don't just go by the advertised torque ratings. I have seen several Kyosho GeeBees fly very well with stock setup. My own GeeBee R2 (Paige Aviation kit) was setup with a wire elevator connector with internal control horn and a pushrod to the front mounted servo. GeeBees (at least the R1, R2 and Z) are very sensitive to CG location so check it carefully before flying. Good luck, they are a fantastic sight in the air!

I would agree. Keep the servo up in the tray.

I used a O.S. .91 FX, and it balanced almost perfect. Putting servos in the tail will cause adding weight or a huge engine up front.

The plane flies very well, its the landings that are tricky.