The last part of the build thread is servo installation.

This is the installation of the remaining control rods for the servos connection to the control horns and the swashplate as well as screwing the servos themselves into place.

I chose Hitec HS55 servos as they fit fairly flush within the T-Rex CDE. I have to say that this part of the build was also the most disappointing for me as the servos barely clear or actually rub on the canopy and the whole servo tray felt like it was rushed and a bit of an after thought. Considering how well the rest of the build is thought through and fits together I feel my disappointment here is well justified.

First job is to screw the servos into place orientated the correct way round and make up the last pushrods. The pictures below illustrate the servo orientations, exactly the same as in the manual.
Having installed the servos, mount the servo horns shown below, screw on the balls and connect up the ball links following the directions in the manual. I tried several ways of doing this and concluded that the way shown in the manual does give the least rubbing/binding on the canopy. The key thing is to make sure that when the servo horns are vertical the control horns that they connect to are also vertical. Adjust the pushrods lengths to make sure this is achieved. See the picture with the red lines below for an illustration of what I mean. Also below are several pictures showing the servos and control horns.
That completes the main servo installation. Tail servo should be installed as per the manual instructions. Make sure that the pushrod to the tail runs completely straight and parallel to the tail boom with no adverse bends that could cause binding. The rest of the build comes under the heading 'setup'. This is covered in the setup section of the site, although at this time the CCPM setup instructions are not written, mainly due to the differences in setup depending on what radio system you are using. However, I would recommend reading through Nigel Fraser Ker's setup article in the setup section of the site as the majority of the information is relevant to a CDE T-Rex.

That concludes the T-Rex CDE build.
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