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Old 12-03-2009 | 02:11 AM
  #14  
riot3d
 
Joined: Feb 2005
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From: oakland, CA
Default RE: Neptuno 170

The elevator push rod is done.

It is always time consuming to set up the ele servo and push rod, you want it to be as precise as possible. Especially, if you opt for the two servo in the stabs configuration. I still recall the first time I tried to set up a two ele servo pattern plane, it was on a Piorun Olympion, back in 1998. I believe the servo used were the analog S9102, and I could never get them to track correctly. Not until the digital servo came along, and it was an instant success on my Angel's Shadow. Since I have had good luck with my Altairs' two ele servo set up, I requested Louis to make my Nep with two servos, instead of one.

Even though, installing two ele servo is nothing new to me, but each plane is slightly different than the other. The most time consuming part is the initial trial fitting, especially on the first stab. There is a servo tray already built inside each stab, all we need to do is to drill the mounting holes. Since Jet Legend has already supplied us with servo horns, clevises, rod ends and turnbuckles, which makes the installation a lot easier. However, instead of using the supplied horns, I used the trusty MK and Hirobo parts with a red M3 cap. The MK usually comes with a M3 screw for the horn, since I was never a big fan of screws in fear of stripping the head, I switched it to a M3 socket head instead.

After installing the servos, I have the following suggestion for Jet Legend:-

A) Lower the servo tray inside the stab more. Presently, the linkage is not quite in line with the servo arm, it's on a slight angle. I have to shim the connector with washers

B) In turn, I had to spend quite a bit of time enlarging the servo arm openings

C) The servo lead exit hole on the fuselage is too small also. Again, more time spent on drilling and sanding

The next step is rudder cable rigging. Stay tuned ...
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