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Thanks Dan, will try that.There's a trick for that.
Epoxy/micro exotherms in the cup faster than epoxy alone, because the microballoons are insulators...the cure heat can't escape the lumped mass. I treat 4 mil plastic sheet as a shop essential, like paper towels. Mix the micro, then dump the whole cup out on a piece of plastic sheet and spread it so it's maybe 1/4" thick. Now it will have about the same working time as plain epoxy.







Marc,Decided to get started on the wings in earnest while waiting for the aileron tube and weights. It's worth mentioning that I've received incorrect rivets form both Vans and ACS. So now I always measure any new bag of rivets as well as ensure it is the correct type (426 or 470).
First the aileron brackets were made for both the left and right sides. Interestingly, the KAIs don't have a way to sign off on building the right side parts, so I just make a separate column on each page for the right side parts.
It was time to start assembling the ribs and installing the aileron brackets. When riveting parts to the rear main spar, I found it easiest to buck the solid rivets rather than squeeze them. Did I mention that tungsten bucking bar is fire.All the rivets for the aileron brackets were squeezed.
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Using the left side to double-check the right side assembly.
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And the aft ribs needed priming.
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The EAA SportAir workshop for fiberglass was super helpful for me, as that is an area I'm not very skilled. I made a test batch of 105/206 West Systems epoxy with 50/50 micro mixed in to test how filling in the rivets would work. Since this will go in the water (hopefully on floats some day), I want to ensure that water does not get captured in the rivet recesses and contribute to further corrosion.
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After trying several approaches, I found that using a toothpick with a dab of epoxy/micro mix worked well to apply just a little bit into the hole. I'll sand it tomorrow and see how it works.
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MarcI'll giver Super Fill a try. Looks perfect.
Main wing spars will arrive on Friday, and due to the limited room in my shop I am planning to prep all the skins and misc parts prior to actually assembling the wing spars to the tank.
With the skins primed, next step is to rivet the nut plates to the access panels. Clearly someone at Van's really like access panels, as there are lots of 'em. It might almost be easier to do this job once the skins are installed, but I am doing them now as per plans. The recessed backing plate for each access hole is really nice, but precludes any ability to back rivet the nut plates on.
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I bought a foot switch and taped the squeezer valve open, and mounted the pneumatic squeezer in the bench vice. It works really well, as both hands can be freed up to hold the workpiece in the right location.
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Next prep item was the landing light mounts.
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The inside was painted black and FlyLEDs test fit. I'm really excited to see these working in the distant future.
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Flyboys Accessories is a stocking distributor for FlyLEDs with service second to none!The -15 was designed to use these lights from FlyLEDs.
Tail Dragger Seven - for Van's RV-15
You can find them here. Currently they are shipped from Australia but they may be sold by Van's soon.
I saw that elsewhere as well. Dissimilar metals is all I can think of, but we painted the weights and primed the brackets instead.Is there a reason to prime the aileron counterbalance tubes, which are stainless?












The aileron counterbalance tubes came in so it was time to install them. Many thanks to the previous posters that figured lots of this out.
First step was to figure out which way the tube goes on correctly (great guidance in the RV-15 Wiki). I found it helpful to tape on the tube and then cleco the LE skin on to double check that everything lines up properly - and to know which holes to countersink. It should be dead nuts on if everything is right.
Then on to countersink the holes in the tube. It was hard to judge exactly how deep these should go, and the countersink tended to wander quite a bit because there's nothing to support it from behind. These worked OK, but I made them slightly larger for the other aileron.
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My neighbor had some issue with the internal ribs creating dents through the skin, so I figured I'd sand down that part a bit. Turns out it really wasn't necessary as everything came together quite well. (Maybe he was forcing things?)
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I used a single 960 washer under the screw head and the nuts went on just fine and didn't bottom out.
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Additionally, some Dowsil 737 silicone (Proseal would work too) was used on the middle rib to minimize the rib vibrating on the tube. I'm not sure why this metal to metal unsecured contact is OK.
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The bottom side of the LE skin laid up nicely because of the dual flat surfaces, but the top was curved so I decided to put a shallow roll along the long aft edge. It was OK without the roll, but IMO better with the roll (which takes about 2 minutes to do). Here's a picture with the rivets in.
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Learning a bit from my neighbor's trials and tribulations, it worked well to cleco the LE skin as follows:
1. Cleco all along bottom long edge of the LE skin
2. Cleco up the three ribs going forward. (starting in center, then edges)
3. Push the skin around the tube and cleco the forward hole on the top front of the LE skin
4. Work your way backward and then cleco the long top aft edge.
5. Rivet per instructions.
At least for me, everything lined up nicely.
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And here with the weights (which were primered and taped to isolate from the tube)
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According to this galvanic reaction chart, lead and stainless steel don't play well with each other.
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Two ailerons officially completed!
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I think that a mirror view of the assembly should be included in the KAIs…just one isometric drawing would be sufficient to check you work and be assured that you are building as intended.
I had my printer do a mirror image of the KAI's. I put it in Section 5 of the Wiki.I think that a mirror view of the assembly should be included in the KAIs…just one isometric drawing would be sufficient to check you work and be assured that you are building as intended.
Marc,I just had an insight as I posted this image above that the mirror image bracket may not be the same - and sure enough it is not.
This is what they should look like from above.
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This is the left side build per KAIs - note the elevation of the bracket relative to the hole in the rib. It is correct.
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And this is the right side built without thinking through it (and not specified in the KAIs) - obviously incorrect. Well, that's a new project for this week.
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And this is the right side built without thinking through it (and not specified in the KAIs) - obviously incorrect. Well, that's a new project for this week.
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The right side as shown is incorrect. It what it looks like when you build both sides the same. The bushing should have the long section on the bottom, so I have to disassemble the halves and re-do it. (like Nate)Marc,
Since I haven't started them yet this is probably a silly question. Why are the bushings reversed on the right side (longer on top).
Got it... Looking at the WIKI and reading posts like yours and others is a huge help. Really appreciate you taking the time to document your build.The right side as shown is incorrect. It what it looks like when you build both sides the same. The bushing should have the long section on the bottom, so I have to disassemble the halves and re-do it. (like Nate)
Thanks for sharing Nate. Your pain made me go slowly and carefully, and was able to reuse the parts. Quite an effort, but one step a time.I made the same mistake. The inboard bell crank is symmetrical, which tricked me into thinking lazy and assuming the outboard would be too.
Drilling to separate those parts did not go great for me. Long rivets in thick material, it really didn't want to come apart around the bearing. I ended up galling the parts enough that I don't want to use them. $36 each for the bell crank halves if anyone is wondering.




Just to clarify, the balloon is there to prevent over pressurizing the tank; the leak check should involve going over every rivet and seam with a bubble solution. I used Camco HVAC leak detection fluid on my -10 tanks as I found it works better than soap and water.With the CiES fuel sender and access covers installed, the tanks passed their pressure test.
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They look great Marc.Flaps and ailerons are completed (including filling the rivets) and going out to the hangar for storage this weekend.
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Marc, You will note that the fifth rivet back on the top of each nose rib has it's tail blocked by the stringer making it difficult to get a bucking bar in there. So, we removed the stringer clecos and slide the stringer out one end of the wing which gave us a clear shot at the rivet tail. Then we set the one rivet on each nose rib, slide the stringer back in place, clecoed it and pressed on.Today was wing skin and cleco day. The wing skins and stiffeners went on easily, much easier than the -7 I built 20 years ago. I though the stiffeners might be difficult to capture with the clecos, but in fact it was all very straightforward. The downside - it requires a lot of clecos. Best estimate is about 900-1000 copper clecos. It would be nice to get some guidance from Van's on perhaps doing this in parts.
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Bottom side:
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Per the KAIs, start at the front and work aft. The duck tape really helpd.
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Top side:
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Even though I borrowed a bunch of clecos from other builders and ordered 400 new ones, this is where I ran out of clecos. 200 more on order. Most RV builders have the silver #40 clecos, but not a huge quantity of the copper #30 clecos.
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We also waited to install the landing light frame until the last two nose ribs where riveted in place. Then we installed the small 1/4 support rib. The landing light frame can then be slide in through the light opening and using pull rivets, set in place.Marc, You will note that the fifth rivet back on the top of each nose rib has it's tail blocked by the stringer making it difficult to get a bucking bar in there. So, we removed the stringer clecos and slide the stringer out one end of the wing which gave us a clear shot at the rivet tail. Then we set the one rivet on each nose rib, slide the stringer back in place, clecoed it and pressed on.