I am scratch building a 96" span plane. I need to know what the deal is with the inline servos for the rudder. I am seeing this alot in pictures. Is it for more torque? Do you need that much power for these kind of planes. I was going to just put one standerd size servo in the fuse under the elevator to control the rudder. But I dont know if that is going to be enough. This is my first one of this kind, so I am just learning the new stuff.

You are DEFINATELY going to need multiple high torque servos on a 96" span 3D capable plane. One standard servo is not going to be near enough power for this application. Several in line is the way to get more power in a pull-pull setup.

How many do you think for a plane this size? And how the hell do you set it up? Or is there another setup for the rudder. And do you think I will need 2 High torque servos for the ailerons?

I mean two high torque servos for each aileron.

at that size....

you will probably need 2 per aileron and 2 per elevator half... might get away with one on the elevator....

as for rudder....

wait for others.... but two or three 5955's or 8611a's would work.......



Forgive me, but are you sure you are ready for this project?

Brian,
First off, what are you wanting to do with this aircraft? 3D? Imac? or just putt around?

If your going 3D you'll need good power:

For rudder you can use ONE!! Hitec 5745, 250oz at 6v, yes 6 volts, don't use 4.8 for digital servos.

use Hitec 5945's for your ele, One per

now for the ail... If you build up the wings you may need two per wing, (Hitec 5645, or 5625) because of flex, but if your using foam core wings you can use one Hitec 5955 per wing. Center it on your aileron.

Now most of the problems asso, with digital servos, is a lack of power and the ability of the batteries to keep up. So use a good Battery system like Formeco.

http://www.fromeco.org/

The settup I just described I have used on all my 33% & 35% 3D aircraft.

Scott

the previous poster is RIGHT on the money with servo choices...

3 on the elevator for a 33% is overkill
2 per elevator half is overkill
and you can do one per aileron if they are stiff and you use 5955's.

We dont even know what kind of plane he is building.

Go take a picture or describe it to us. It all depends on how big the rudder is, not how big the plane is.

Here is a simple answere to servos.

$50, you should get 5645's or 945's or maybe 645's for $30

but a way better servo fo raround $70 is the 5945.

Never ever put two 5945 or comparable servos in line, it is pointless unless you already have them, One $100 5955 or 8611 will give you more power for less money.

At the most you should need 2 5955's.

Typically for a 35% scale aerobatic plane, you're going to need one per elevator half, two on each aileron, two on the rudder.

If you plan on doing 3D or competing in IMAC, you're going to want GOOD servos, like JR 8611A's, Futaba 9152's (I am not too familiar with Futaba, so forgive me if I got the number wrong), or Hitec 5995's. Servos like 8411's or 5945's will work also, but you might not have enough torque with only two of those on rudder.

I agree that you will need not just good batteries, but also good regulators if you are going with a 6v setup. If you are over-amping the system, you will notice it in the air. If you want to go with Lithium-ion batteries and regulators for them, Fromeco or Duralite are some of the best in my book; I have no complaints with either.

To match the servos together, you can use Matchboxes from JR or Equalizers from Smart-fly, which will work on most setups.

Hope this helps,
Brandon

Thank you all. I have figured out what the plan is off this info. Ive built giant before, but not with the kind of power Im going to need to control this plane, and like you guys, I want to do some arobaticts. Nobody at the hobby shops know what im talking about. So this is alot of help. Thanks.

(8) 9152's