Vans Aircraft RV-12 Build, Section 21: Mid Fuse Bibs & Bottom Skins (part 4)

Reference: page 21-09; 0.5 hours

Today was a short workday for the RV-12 airplane. Working on the air compressor is cutting into the time spent on the RV-12.

Step 2: Rivet one of the f-1204-H Bulkhead Caps to the forward side of the F-1204B-L Aft Bulkhead Side and forward side of the using the rivets called out in Figure 2 of the RV-12 plans on page 21-09. DO NOT rivet the three holes in the top flange of the bulkhead cap which are common to the aft bulkhead side, or the single hole in the bottom forward flange indicated in the figure.



Step 3: Slide the BUSHING AL.197X .313. X 1.954 Bushing into the F-1204M Roller, than install them between the F-1204B-L Aft Bulkhead Side and the F-1204CL-L Fwd Bulkhead Side Assembly using the hardware called out in Figure 2 by Van's Aircraft. The bolt is secured with the nutplate attached to the back of the F-1204A Center Section Bulkhead.





Step 4: Rivet the remaining F-1204H Bulkhead Cap to the forward side of both the F-1204B-R Aft Bulkhead Side and the F-1204CL-R Fwd Bulkhead Side Assembly using the rivets called out in figure 3. DO NOT rivet the three holes in the top flange of the bulkhead cap which are common to the aft bulkhead side, or the single hole in the bottom forward flange indicated in the figure.



Step 5: Slide the BUSHING AL.197X .313. X 1.954 Bushing into the F-1204M Roller, than install them between the F-1204B-R Aft Bulkhead Side and the F-1204CL-R Fwd Bulkhead Side Assembly using the hardware called out in Figure 2 by Van's Aircraft. The bolt is secured with the nutplate attached to the back of the F-1204A Center Section Bulkhead. NOTE: The roller on the right side of the aircraft is oriented in the opposite direction of the roller on the left side



This completes page 21-09 of the RV12's plans. Happy landings!

Vans Aircraft RV-12 Build, Section 21: Mid Fuse Bibs & Bottom Skins (part 6)

I was able to complete a lot of assembly on the RV-12 aircraft today, until the air-compressor blow apart. In the picture below you can see some of the piston pieces (yes it is an oil-less compressor with somewhere between 700 and 1000 hour of run time (one Cessna restoration, the RV10 and the RV-12 project to date.) These things make an incredible racket when they decide to go south!



Reference: page 21-07, 21-08, 21-09; 6.0 hours

Step 1: Using the locating holes drilled on Page 21-6 Step 7, cleco the F-1237E Seatback Hinges to the F-1225-L & -L Seat floors as show in Figure 1 of the RV-12 plans. Center the lines drawn on Page 21-06 Step8 on the holes in the seat floors, then match-drill #30 the holes into the seatback hinges, Remove and deburr the holes.



Step 2: Except for the holes that will be used to attach the seat floor ribs, rivet the F-1237E Seatback hinges to the Seat Floors. Note: Rivets holes that are left open until later in picture below.



Step 3: In both Seat Floors, dimple the four holes in the aft flanges and the holes alond the forward and inboard edges as indicated in Figure 1 on page 21-07.



Step 4: Dimple the six nutplates, shown in Figure1, along the forward edge of the Seatfloors, then rivet them to the seat floors.



Step 5: Separate the F-1253 Seat Floor Support by removing the hatched areas shown in Figure 2 of the RV-12 plans.



Step 6: Rivet the F-1225-L Seat Floor to the remaining Left Seat Rib Assembly(except for the hole indicated) and the Flaperon Mixer Bracket/Seat Rib Assembly using the rivets called out by Van's Aircraft.



Step 7: Dimple the nutplates shown in Figure 3, then rivet them to the Flaperon Mixer Bracket/Seat Rib assembly and to the F-1225-L Seat Floor using the rivets called out. Temporarily install an 8-32 screw in the MS21051-L08 nutplate to prevent misalignment while riveting.





Step 8: Using the rivets called out in Figure 3 on page 21-07, rivet the F-1253-L Seat Floor Support to the bottom of the F-1225-L Seat Floor. Do not install a rivet in the aft most and forward most hole as indicated in the plans.



Step 9: install the smap bushings called ou tin Figure 3 of the plans.



This completes all of the steps on page 21-07.

Reference: page 21-07:

Step 1: rivet the F-1225-R Seat Floor to the remaining Right Seat Assembly (except the hole indicated) and the Pulley Bracket/Seat Rib Assembly using the rivets called out in Figure 1 on page 21-08 of the RV-12 plans.



Step 2: Dimple the nutplates shown in figure 1, then rivet them to the Pulley Bracket/Seat rib Assembly and the the F-1225-R Seat Floor using the rivets called out. Again, temporarily install an 8-32 screw in the MS21051-L08 nutplate to prevent misalignment while riveting.



Step 3: Using the rivets called out in Figure 1, rivet the F1235-R Seat Floor Support to the bottom of the F-1225-R Seat Floor as shown. Do not install a rivet in the aft most and forward most hole.



Step 4: Install the snap bushings called out in Figure 1.



Step 5: Rivet the Left and Right Seat Floor Assemblies to the F-1204A Center Section Bulkhead using the rivets called out in Figure 2 of Vans Aircraft's plans 21-08.











This completes page 21-08.

Reference page 21-09.

Step 1 Rivet the F-1204CL-L &-R Fwd bulkhead Side Assemblies to the Left and Right Seat Floor Assemblis using the rivets call out in Figure 1 of the plans.



That's it for today's work. I am going to have to figure out what to do with the compressor.

Vans Aircraft RV-12 Build, Section 21: Mid Fuse Bibs & Bottom Skins (part 5)

Reference: page 21-06; 2.0 hours

This entry deals with more construction of the fuselage for the RV-12 aircraft. If you haven't noticed before, I would like to draw your attention to the index on the right side of this blog. In it you will find links to the different pages that have been completed, by page number, other general aircraft topics, as well as links to my RV-10 build.

Step 1: Dimple the nutplate attachment rivet holes in the two F-1267A Crotch Strap Brackets and machine countersink the nutplate attachment rivet holes in the two F-1267B Crotch Strap Brackets.



Step 2: Dimple the nutplates for the F-1267A Crotch Strap Brackets then using the rivets called out by Van's Aircraft in the plans rivet the nutplates to the F-1267A & B Crotch Strap Brackets.



Step 3: Dimple the four #30 holes in the sloped flange of the one remaining F-1215-R Seat Rib as indicated in Figure 2 on page 21-06.



Step 4: Rivet one each of the F-1267A&B Crotch Brackets to the Flaperon Mixer Bracket/Seat Rib Assembly and to the remaining F=1215-R Seat Rib.





Step 5: Dimple the four #30 holes in the sloped flange of the one remaining F-1215-L Seat Rib as indicated in Figure 2 on page 21-06.

Step 6: Rivet the remaining F-1267 A&B Crotch Strap Brackets to the Pulley Bracket/ SeatRib Assembly and to the remaining F-1215-L Seat Rib (from step 5) using the rivets called out in Figure 3.



CAUTION: When cutting lengths of AN257-P3 hinge, be sure enough remains to account for the length requirements of the parts given on pages 23-08, 26-02, and 29-02.

Builder's note: I didn't cut the hinge pin at this time. I don't know if this will make any difference, however on the RV-10 it was a life saver.

Step 7: Cut a 20 inch length of AN-257-P3 and remove the hinge pin. From these two hinge halves, make four F-1237E Seatback Hinges using the dimensions called out by Van's Aircraft in figure 4 on page 21-06 of the RV-12 plans.



Step 8: As shown in Figure 4, draw a line on the flush side of the F-1237E Seatback Hinges centered on the locating hole drilled in the previous step.





This completes all the steps on page 21-06. Until next time!

Vans Aircraft RV-12 Build, Section 21: Mid Fuse Bibs & Bottom Skins (part 4)

Reference: page 21-04, 21-05, 39-02; 11.0 hours

A couple of things before I get started. First I am planning on installing the autopilot option, so this is the time to start in on section 39 Autopilot Servo Brackets. Some of the steps from each of the two sections are intermixed. Second the parts need to install the servo brackets are included with the fuselage kit in a separate bag.

Step 1: Separate the F-1219 Flaperon Mixer Arm by removing the hatched area shown in Figure 1 on page 21-04 of the RV-12 plans.



Step 2: Rivet the two F-1218 Flaperon Mixer Brackets to the F-1202A Forward Intercostal and the F-1220B Aft Intercostal.


Step 3: Machine countersink the nutplate attach rivet holes in the Flaperon Mixer Arm, then attach the nutplates called out in Figure 2 of the RV-12 plans.

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Step 4: Bolt the F-1219A & B Flaperon Mixer Arms and the bushings called out in Figure 2 to the F-1218 Flaperon Mixer Brackets using the hardware shown by Van's Aircraft on page 21-04 of the RV-12 plans. Torque the bolt enough to remove any slop or play, but still allow freedom of rotation.

Builder's note: The bushings are in hardware bag 2715. Also it is not called out in the plan but I lubricated the bushings and washers parts with Areoshell #5 grease.



Step 5: Bolt the second, longer bushing called out in Figure 2 between the F-1291A & B Flaperon Mixer Arms.



Step 6:Separate the four Seat Belt Attach Lugs, and the two F-1216 Seat Belt Attach Lug Supports.





Step 7: Remove the vertical strip of material from the lightening hole of each F-1215-L&R Seat Rib as indicated in Figure 6 of ther RV-12 plans on page 21-04.



Step 8: Using F-1215-L&R Seat Ribs, Seat Belt Attach Lugs, and Seat Belt Attach Lug Supports, cleco together four Seat Rib Assemblies; two right and two left.



Step 9: final-Drill #30 the eight 1/8" dia. holes common to all the parts , then rivet them together.



Builder's note: This completes page 21-04.

Reference page 21-5

Step 1: Set aside two Seat Rib Assemblies (one left and one right). In the remaiining two Seat Rib Assemblies, final-drill #19 the screw holes for the nine nutplates depicted in Figure 1 on page 21-05 of the RV-12 plans. Note that in the case of the MS21051-L08 nutplate, the screw hole is NOT the center hole.



Step 2: Dimple the indicated attach hole for the MS21051-L08 nutplate in the aft, sloped flange of the two Seat Rib Assemblies. (The second attach hole has been factory dimpled.)



Step 3: Dimple the four K1000-08 nutplates called out in Figure 1, then rivet them to both Seat Rib Assemblies. The five remaining nutplates are installed on paers 21-07 and 21-08.



Step 4: In both Seat Rib Assemblies, dimple (flush on top) the three #30 holes.



Builder's note:some of the pictures show the parts before priming and then after priming. A few of these steps I did out of sequence so I could prime them all at once.

Step 5: Locate the four remaining Seat Ribs. In all four seat ribs, final drill #19 the screw holes for the nutplates depicted in Figure 2 of the plans.

Reference 39-02 Step 1: Trim the called out F-1215 Seat Rib by removing the material shown hatched in figure 1 on page 39-02.

Builder's note: It is easy to get the seat ribs mixed up so go slow double check before cutting!!!





Reference 21-05 Step 6: Set aside one pair of the Seat Ribs (one left and one right). Dimple the nutplates shown in Figure 2, then rivet them to the remaining two Seat Ribs.



Step 7: Dimple the nutplates shown in Figure 3 on page 21-05 of the RV-12 plans and the corresponding holes in the Left Seat Rib Assembly(the left seat rib assembly from Figure 1), then rivet the nutplates in place.





Builder's note; My Flaperon Stops were curved and needed to be straightened see picture below.



Step 8: Machine countersink the two holes, indicated in Figure 3, in both F-1252 Flaperon Stops.These are 120 degree counter sinks NOT the standard 100 degree!



Step 9: Rivet one of the F-1252 Flaperon Stops and the Pulley Bracket Assembly to the left Seat Rib Assembly using the rivets called out in Figure 3.



Step 10: Rivet the F-1215-L Seat Rib that has the nutplates installed from step 5 to the Pulley Bracket Assembly as shown in Figure 3.



Step 11: Dimple the nutplates shown in Figure 4 and the corresponding holes in the Right Seat Rib Assembly (the right seat assembly from Figure 1 on page 21-05.



Step 12: Rivet the remaining F-1252 Flaperon Stop and the Flaperon Mixer Arm Assembly to the Right Seat Rib Assembly.

Reference 39-02; Step 3: (Step 2 is NA) Cleco the F-1269 Servo Doubler to the F-1215-R Seat Rib as shown in Figure 2. Match-Drill the holes from the servo doubler into the seat rib per the call-out in Figure 2, Detail A-A.



Reference 39-02; Step 4: Rivet the Servo Doubler to the F-1215 Seat Rib per the call-out in Figure 2. Detail A-A.



Reference 39-02; Step 5: Rivet the F-1269 Servo Doubler to the F-1220B Aft Intercostal. See Figure 1 for assembly orientation and Figure 2 for rivet call-out.







Reference 39-02; Step 6: Install the screw, washer and nut called out in Figure 2. Rotate, then rivet the nutplate back into place using the rivet called out in Figure 2.



This completes page 39-02.

Reference 21-05 Step 13: Rivet the F-1215-R Seat Rib that has the nut plates installed from Step 5 to the Flaperon Mixer Arm Assembly.