ORIGINAL: opjose
I would not mechanically oppose them that way...
The elevator servos need to move in OPPOSITE directions to each other for both elevator halves to move in the same direction.
The aileron has no such requirement so you could opt to hook them both up to a ''Y'' cable and run them off one channel.
With the elevators you reallyl need to use one of the techniques I mentioned above.
IMHO the WORST choices are to put each servo on a separate channel or to use a cheap servo syncronizer cable.
The elevators end up with a lot of travel for 3D, and the delay becomes very visible at stick extremes. Mechanical opposition is still better than both of these options.
Actually, you dont need to electronically reverse the servo or use a syncroniser. Let us take the LHS servo looking from the tail- if it turns counterclockwise with the pushrod connected to the servo arm above the pivot point, it will pull the elevator down. Now consider the servo on the other side. Here also the servo rotates counterclockwise but has the pushrod connected into the same horn hole but below the pivot point. Thus it will also pull the elevator down. All servo horns are numbered because each is set at a tiny different angle to each other, meaning that if you install the horn such that arm no "1" is at exact 90 Deg to the servo on one servo, you can achieve exactly the same angle using only the same arm number on the other servo at neutral. So long as you have the same servo horn number and the same hole connected on either side and your neutral is set properly using the number of turns on theclevis on both sides, both deflections will be equal and no reverser is required. Both my Topstar and Reactor are setup this way.
ORIGINAL: opjose
As Ahicks mentioned standard servos fit just fine.
Z Bends work fine, if you set them up as per the instructions and use ''keepers''.
I went with the provided horns and ball links for the elevators. I've well over 200 flights on my Funtana and they have held up well.
Ahicks, z-bend will be only on the servo horn side with snaplink keepers
ORIGINAL: opjose
Re: Strengthen...
Landing gear attachment area.
Tri stock EVERYWHERE you can.
Remember the idea is NOT just to put a piece of triangle stock along the mount, but rather to SPREAD OUT any torsional loads.
As you tackle this, don't think to yourself... ''where can I glue in some tri-stock'', but instead, if the gear pushes forward, ''where is the load applied and what can I do to prevent twisting?''
Longer adjacent cross members are far more effective than gluing on some tri-stock on each side of the gear mount board.
You mean think of the fuse side as a truss and analyse which way the landing force will go and add additional tri and rectangular stock along the force lines? Thats exactly what I will do. I have done the same with my Topstar. When I got the old airplane it used to groan horribly when you picked it up mid fuse. So I added lile ply and spruce stock inside the fuse in the direction in which force would be transmitted similar to bridge trusses. On top of those I added more lite ply in pices alomg and across the grain. All this was done with epoxy for max strength. When I was done, it stopped groaning. Subsequently I had so many crash (dead-stick) landings with a 75AX but never had anything break where I had reinforced
Ameyam