Friday, February 28, 2014

Vans Aircraft RV-12 Airplane Build, Section 11: Empennage Attachment (part 4)

Reference: pages 11-07; 2.0 hours

Today's entry is still deals with working on the electric trim system for the RV-12 airplane. There is a possible "Gotcha" I will address as the pieces are assembled.

Step 1: Attach the clevis plates parts and hardware called out by Van's Aircraft on page 11-07. Cleco the plates to the Pushrod while paying attention to the orientation of the plates and rod.

Builder's note: So here is a possible GOTCHA. When the clecos are inserted from both sides they can hit each other and will misalign the assembly as can be seen below. One possible fix is to trim the tall off the celco so they won't hit inside the tube. I didn't have a problem with this, but forewarned is forearmed.

Step 2: With the assembly correctly aligned, match drill #30 into the push rod. Then remove the clecos (but not the hardware) and deburr and remove any chips.

Step 3: Clamp the threaded insert into the end of the pushrod making sure the rivet holes are aligned. Note: Rivet is inserted just to align holes

Step 4: Match drill #40 the threaded insert and pushrod.

Step 5: Rivet the Clevis plates on while pressing towards the pushrod as each rivet is set. Rivet the threaded insert in.

Builder's note: I found using a hand riveter worked very well as the rivets across the tube from each other hit each other (just like the clecos did) until they are set. That's why you need to push down as the rivets are set.

Step 6: Installed the rod end and jam nut to give the required length as outlined by Van's Aircraft. I then final painted the exposed pushrod.

This complete today's work on the RV-12 airplane . After the paint sets I will continue with the installation fo the servo trim system for the RV-12 airplane.