Building a plane that uses two seperate elevator surfaces driven by a single servo. If I was smarter, I would just have opened up the slot for the stab and made a joiner wire, but I'm just not that smart. The kit includes a little hardware but that allows you to run the two seperate pushrods to the two elevator halfs, then connect them to a single pushrod coming off the servo. I don't particularly care for this type of setup, especially on the elevator. As I see it my choices are:

1. wrap the two pushrods and teh pushrod from the servo with copper wire and solder them all together solid.

2. Run the two pushrods to the servo horn, using two seperate holes. Connect the pushrod to the elevator control horns in different holes to make up for the difference in travel. I could probablly get this very close, as I'm using World Models control horns that are infinetely adjustable, but I don't think I can get the two rods right next to one another in a control horn and still get a securing device on them.

3. Since I do have a 9c, install another servo for the other elevator half and mix them. Difficult as there is only space for three servos, but I could just use a micro servo for the throttle and mount it somewhere else. Plus is is a .40 sized warbird, and I don't really want to make it overly complicated.

Opinions and ideas welcomed!

TIA,
Andy

Choice number 1 is pretty standard, works well. In effect, you build a "Y" pushrod. each end at the elevator halves has its own threads so you can adjust each elevator half independently.

I've seen number one work pretty well. The other two require extra weight or hardware. With number 2 you wouldnt have equal movement on the elevators and the rods might bind. You can use a wood pushrod the length of the fuse and then just split off into a Y with the two elevator pushrods.

For this installation I like to use the Dave Brown arrow shaft push rod kit. It includes an end piece with two holes for hooking up dual elevators using 2-56 push rods. This system works great and is easy to install. IMHO. Good luck.

Bill

#1

For the past couple of years I have been building race planes that require duel rods to the elev. I use one from the tail all the way to the servo and the second comes from the other side and meets the "main rod" about 2" short of the servo. Depending upon the angles of the rods I put a "Z" bend in the end of the shorter rod so they come together nice and clean and the tubes have room between them. If I need more space between them I "Z" bend both at the same point so they join nice and clean then wrap them with 24G copper wire and silver solder it all together. I also run 4/40 rods for less flex, but I have used 2/56 with great results too. Running a 7.5lb plane at 150+mph I prefer duel control rods and 4/40 parts. If you need I can try to post a picture later. [8D]