Well, between attending a couple jet events and work, I finally got some time to put some work in on this new plane. I had placed an order for my Futaba 9157 servos and servo arms by Futaba which will be installed on all surfaces and I am ready to start.
My normal starting point on a new build is with the vertical stab. I feel that this allows me to get into the building mode slowly. The bottom opening had to have some slight trimming done to allow the servo to be trial fit into position. Turns out my servo opening in the wood mount needed some slight sanding on the opening to get the servo to drop in. This was done with some small sanding files and the servo fit right in. The servo mounting screw holes were already drilled at factory, so all that was left to do was to use #3 servo mounting screws , beacuse of the size holes drilled. I also used thin CA on the holes to help harden them. This was an easy mounting to get out of the way.
After deciding which double servo arm i was going to use, I decided on a MPI 2 1/2" double arm because I had it on hand, and this was the measurement of the control horn that was already factory mounted. You need to decide on what servo arm you want to use prior to cutting slots for the arm in the vertical stab skin. This is because not all arms are the same. Some mount higher or lower on the servo. To figure out the slot location, I measure from the top of the arm to vertical stab botom then transfer these measurements to the outside of the skin. Measure twice and cut once. I start at what would be the servo arms center point and work my way from there. It can take time but I end up with a keep slot for the arms travel movement. Sorry, I had pics of how this was done, but I accidently deleted them from my camera prior to downloading them.
After servo arm slots are done and you are happy with them, it is simple to install the ball link and pushrods. My servo position has me using 2" Hangar 9 Titanium pushrods and Dubro HD Ball links. I decided on just HD ball links because of the Push-Pull type setup.
I did the Vertical stab tube mounting of the alunium tube. And it was a simple mounting with the screw with the hole in the vertical stab and tube already done.
For now, this stab part is done and ready for mating up to fuse.
Just a side note, when you go to set up your radio travel throw, reduce you ATV to it's minimum so as not to overdrive the servo arm past the slot openings. With this size arm, full ATV travel is not necessary.
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