ELT - Flap System - Antenna Mount - Misc

Happy Veterans Day! It's been an interesting year, getting used to my new job where we observe all of the federal holidays and have the day off. Not that I'm complaining of course... more time to build! :-)

Today was an excellent day making progress in a number of areas. I started off by installing the ELT mount in the tailcone, which went fairly quickly even though it was a bit tough getting access to install blind rivets in all the holes between the mount and the J-stringers behind it. I ended up stacking two #6 locknuts on the rivet stems so that my rivet puller could get the grip it needed for the job. About 20 minutes of this combined with some awkward leaning, and the mount was in!

ELT mount installed, sans ELT

ELT mount installed, with ACK E04 ELT

Cool! Looks "official" now. You may notice that the mounting tray is not parallel with the tailcone stringers. I'm using the door sills as a reference for level, and discovered that the stringers in this location actually slant upwards just slightly. I used a level to approximate the angle here, and I believe it turned out pretty darn close. I have a 10-degree tolerance per the installation requirements anyway, and I'm confident that it's well within that. (EDIT 11/15/2015: A tip I later discovered, kind of an "oh, duh!" moment: if you have a smartphone like an iPhone with a compass/level app, you can use it as an inclinometer and get very accurate measurements to the nearest degree! Turns out this ELT is approximately 2 degrees off from perfection. Well within tolerance, but I could have done it perfectly if I had been thinking!)

Next on the agenda was to start assembling the flap system. Oops! Quickly discovered that before I do any final installation in this area, I'll need to install my belly-mount COM antenna doubler that I want to put in this location. So, on to that.

I chose this location for the antenna for a couple reasons. First, I wanted the antenna to be in the tunnel area so that it is always accessible from the inside. I've seen a number of builders (the majority, in fact) use the area under the rear seat to mount a COM antenna, but that just doesn't sit well with me. If you ever have to gain access to this area for whatever reason, you'll be drilling out hundreds of rivets and removing a pretty large part of the cabin floor. So I made the decision early on to put all the belly antennas in the tunnel area (I think there will only be two: this COM antenna, and a transponder antenna further forward).

The second reason for choosing this *exact* location in the tunnel beneath the flap torque tube is a bit of  accidental chance. Way back when we were first joining the forward and mid fuselage sections together, Sarah had a bit of an "oops" moment with the tungsten bucking bar, which had slipped from her hand and went flying through the air. In a slow-motion "noooooooooo!" sequence, fate steered the bucking bar's trajectory straight toward this area of the tunnel, resulting in a solid "clunk!" and producing a nasty outwards dimple in the bottom skin. We learned two things from this event: (1) Install an antenna in this location; and (2) secure the bucking bar to Sarah's hand with duct tape. Just kidding, of course. We weren't actually sure if we would install an antenna here yet ;-)

Reading some of the other build blogs online, I discovered that fellow RV-10 builder Justin Twilbeck actually had a similar mishap (see his blog post "Dent Happens" here) and decided to put an antenna at the scene of his accident as well! Funny coincidence.

Anyway, this location actually works out perfectly, as it is right at the "hip" of the fuselage, at the aft-most part of the bottom before it takes a turn upwards. I believe it really is actually an ideal location. So, I got started on making a doubler to place over it. I found a template for the hole pattern for the Comant CI-122 and used it to start making the doubler, and ended up with this part:

Comant CI-122 doubler, prior to enlarging circled holes for antenna connector and mounting screws (also added another row of holes near the left side in this photo)

After a bit of match-drilling to the fuse bottom skin and enlarging the holes, I was able to shoot the piece with primer quickly and await Sarah's return home from work to finish dimpling and riveting the piece into place. In the meantime, I continued with some miscellaneous tasks left over from the previous sections, including running some conduit along the right side of the baggage area and installing the cover panel, as well as installing the cover panel on the left side of the baggage area behind the rear seats. Lastly, I installed a number of nutplates that go in the various locations along the interior of the fuselage to secure cover panels and such. About this time, Sarah got home and we proceeded to dimple the bottom skin and rivet the antenna doubler into place:

Antenna doubler installed in tunnel. Antenna is offset slightly to provide clearance for elevator push rod, visible on the right

Comant CI-122 screwed to the bottom of the fuselage

Looks neat! I didn't have long enough screws for a permanent installation, but they worked perfect for a trial fit. Seems pretty solid and sturdy here and should work great!

For the final chapter today, I finally got to what I had set out to do earlier today, which is to install the flap system. I had already drilled and prepped most of the parts on a previous day, so today it was really just all about installing everything into the plane. I quickly discovered my first issue, which was that the holes in the fuselage side skin were too small to fit the flap torque tubes. I couldn't figure out any other way to get both tubes into place, and ended up enlarging the skin to match the underlying holes at 1-1/16". Then the next challenge was installing the UHMW bushings and getting everything oriented properly. I discovered another problem: the cutaways for the powdercoat weren't exactly in the correct locations on the torque tubes! This caused a huge increase in friction, and the tubes were very difficult to rotate.

L torque tube inner end, line drawn where bushing extends to

Each of the four locations had varying amounts of overlap, so I traced lines on all ends and carefully ground away the powdercoat, and polished the surfaces on the scotch brite wheel afterwards. Re-installing the tubes showed a dramatic reduction in friction! Good stuff.

So after about an hour of bolt-installation and rigging, we had the whole works put together!

Sarah is happy. Please move your hand though so we can see!

There we go! Flap system installed and ready to go

Sarah wanted to take a picture of me tightening the last bolt holding the actuator to the torque tube arm (visible above with no nut)

With that, we were able to hook a drill battery up to the flap motor and presto... The flap arm appears to work perfectly!! Wahoo! This is the first electrical part that is permanently installed to the airframe now. Exciting times. We ran the flaps up and down a couple times until the excitement wore off a bit and decided to call it a night. Big day of building today, and all ended up going very well! Tomorrow if the UPS gods are shining on us we should get some more fittings to satisfy our insatiable appetite for Aircraft Spruce packages, and we can continue with the fuel system. Maybe we'll also get to install more of the control system, even the control sticks! 'Stick' around!!

Brakes, Fuel, Flaps, and Panel!

Big day, lots of little stuff. Oh yeah, and Happy Halloween! It was nice to get back to building after the whole ordeal of unpacking the finish kit. We started this morning by flaring and installing the remaining two brake lines, and then final-attached the -AN fittings to the parking brake valve for a first installation. I've decided to use Loctite 567 as a thread sealant, which seemed to get the best reviews on its performance overall. It smells pretty good too... Sarah claimed it smells like a "hotel lobby with a swimming pool nearby." I would have never made that association, but, yes once she said that, that's EXACTLY what it smells like.

Attaching the AN fittings to the parking brake valve using Loctite 567

The completed fitting installation

We then test-fitted the parking brake valve with all four lines connected to it for the first time. It fits perfectly! Now the only thing left with the parking brake valve is to figure out a control mechanism and get the necessary hardware for it. We'll get to that at some point eventually.

In the meantime, it was time to get started assembling the fuel system. I had ordered a number of fittings necessary to put everything together, but I quickly discovered I was in need of just a couple more. No worries, I'll tack them on to the next order from Spruce. Until then, since I had the Loctite 567 out, I could still install a few fittings into the various fuel system components.

The 100-micron fuel prefilters with AN-6 fittings installed

Walbro fuel pump with AN-6 fittings installed

I then made two brackets to attach the fuel prefilters to the landing gear mounts under each seat out of angle aluminum. It went pretty smoothly, and I think I have the finalized fuel system routing/layout figured out. I'll make a diagram here in the next couple days and post on here.

Moving on to see what I could work on, I got back into Section 40 and made 4 little spacers used to attach the flap actuator to its brackets:

The four spacers placed next to their respective steps in the plans

Those spacers were kind of a PITA to make! They are quite small, and it's really hard to hold them square against the bandsaw and belt sander, but with a bit of patience and burnt fingertips we got them made! The dial caliper works really well here to check measurements and end up with a perfectly-sized piece.

The last thing today before calling it quits was to get back to Section 31, Upper Forward Fuselage. We're basically done with that section except for some dimpling and riveting, but I don't want to do too much more until I really finalize my panel layout. So, I clecoed the assembly back together and started with one of my all-time favorite pastimes, avionics daydreaming.

Initial proposed general panel layout

2x Garmin GDU 46x displays, Garmin GMC 307 control panel, and GRT Mini-X backup EFIS

Still LOTS more planning needed for this panel, and even more money to spend on it. The main thing I wanted to do now though is see if I can figure out which parts of the underlying structure will need cutouts and modifications to support the layout I have in mind. I do want to have my autopilot control high and centered, which may require some modifications to the center rib for clearance. I'll need to get some final measurements and start making those cuts. I also need to figure out how I want all the switches laid out. I'd like to keep the panel as symmetrical as possible, and allow for PIC'ing from either the left or right side with minimal difference in usability of the panel. Like I said, lots more to figure out here, but I thought I'd at least share my current thoughts of what I'd like out of this panel.

That's pretty much it for now! I think the plan for tomorrow is to finish up the rear seats, and maybe some other miscellaneous shenanigans... stay tuned!

Flaps complete!

Crossing items off the "partially complete" list is going swimmingly... tonight we finished the flaps! It went just about as well as the ailerons did on Monday, just a bit longer of course and a few more rivets to contend with. It feels good to be done with trailing edges, they are always such a tedious pain in the you-know-what. Now that all four control surfaces are complete, it was time to bolt it all up to the wing, stand back and take a picture!

L flap, inboard side

L aileron, outboard side

R aileron on left, L aileron on right

I've got some aluminum C-channel that I'll be clamping on to each of the 4 edges for a day or two each, to help them become completely straight while the proseal cures fully. It's still in that perfect state where it's cured, but still cleans off easy enough with acetone, and can be influenced by things like this clamping device. Hopefully when all is said and done, we'll have four perfectly straight and well-aligned control surfaces!

Flaps - Ailerons Complete!

Happy Memorial Day! Today was a work holiday for me, but unfortunately Sarah had to go to work at the airport. So, in an unprecedented and incredibly bold move, I decided to break out the proseal myself and do a round of it solo. All things considered, it actually went pretty well, and somehow I didn't make a giant mess. Sarah would be proud.

I started the solo proseal adventure by gooping up both flap trailing edges and clecoing the assemblies together. I had just enough remaining to attempt to patch up the part of the L fuel tank that appears to be the only place that had a leak. We'll have to let all this cure and retest.

Next, it was time to rivet the aileron trailing edges together, that had been setting up since Saturday. That also went pretty uneventfully, and in short order both ailerons were complete! Yay, something we can check off the "partially complete" list as now "done"!

Not much else to report today, and tomorrow we'll be going to a fly-in BBQ at KIIB. Hoping to get the flaps and fuel tanks completely done sometime this week, then it's on to the fuselage!

Flaps - Ailerons - Fuel Tanks

Things are getting pretty hectic in the factory over this long weekend. I feel like we're simultaneously working on 3 or 4 sections at the same time, and all of them are only "half" done. We're halfway through the wing bottom skins but on hold to go any further until we're ready to seal up the wing, we're halfway through with the flaps, we're mostly through the ailerons (except trailing edge), we're mostly done with the tanks but still need to pressure test them... time to move some of these to "complete" status!

Not today, unfortunately. However, we did make leaps and bounds of progress towards this goal. Started this morning with riveting the L and R flap leading edge and top skins to the skeletons. We again installed the flaps onto the wings to check for straightness. They are much more rigid now but can still be influenced one way or the other, albeit only slightly. Still looking straight, which is great news! Then we took them back off the wings and started installing the bottom skins. The flaps are now to the same point as both ailerons: Complete except for trailing edge, and perhaps a few blind rivets that need to wait until the trailing edge is assembled.

With talk of the trailing edges comes talk of Proseal. With talk of Proseal, of course, comes talk of our fuel tanks, namely the goof-up we did with the R tank attach zees being all backwards. So, with the sealant all fully cured it was time to bust out the drill and attempt to carefully remove the seven zees and extract all the rivet tails from the tank. Surprisingly, drilling them out was quite easy (finally, something seemed to go right)! I was also able to fish out about 2/3 of the rivet tails with little issue. The rest of them are still floating around in there for now, but I think the best bet is to try to rinse them out once the tank is sealed up again. We'll keep count, and make sure we get them all.

With the R tank zees removed, cleaned up, and oriented properly, we mixed up a batch of proseal to do the aileron trailing edges and re-attach the zees in the correct order. Happy to say that both efforts seemed to go quite well, and now all that's left to do proseal-wise is the flap trailing edges.

Last thing for the day, it was the "moment of truth" for the L fuel tank. I had bought some fittings, tubing, and valves a week or so ago to make a pressure testing system to connect to my compressed air supply and pressurize the tanks to around ~1psi. This is a higher pressure than what the proposed balloon method allows, which I've read only pressurizes to around 0.5psi. That comes up a little shy of nominal tank pressures during flight when filled with fuel, so I decided to go with this method.

The results were good overall, I'd say. The tank initially held the 1psi pressure, but over the next 10 minutes I noticed it was definitely dropping slightly. A soapwater spray of the tank's exterior quickly revealed the apparent only leak-- at the outboard-top corner where the end baffle meets the aft baffle. Van's points this area out as a common leak source (all four corners, actually), but this particular corner is a sort of "best case" scenario for leaks, as it is the top-most part of the entire tank and theoretically needs to be the least leakproof, so to speak. From the looks of it, we should just be able to goop a bit more proseal on that corner and it should resolve the issue. We'll see if it's that simple... fingers crossed!

Now we wait for some proseal to cure... maybe tomorrow we'll get started on Section 23 - Aileron Actuation! That would be cool, because it's the last chapter of the wing kit! (Except tips, which we're putting off for now...)

Stay tuned!

Fuselage Inventory Continued / Flaps

Finished inventorying the fuselage kit tonight! I believe we did discover one part missing, the F-1059A Baggage Door Forward Frame. I'm sure it's no big deal, the missing part isn't very big at all from the looks of it in the drawings. So far in the build, with 3 kits and thousands of parts (tens of thousands if you're counting rivets) I can handle one little piece being missing. Actually it's still unbelievable to me that they are really this accurate. I'll contact Van's today about it... we're still well within the 30-day window to sort out these kinds of issues. They did get all of my "deletes" perfectly though, so that's a plus!

Speaking of deletes, it seems there is always some interest in questions like "what to delete from the fuse/finish kits and why"... I will try and answer what we decided to do for our fuselage kit here:

1. Windshield and side windows-- replacing with Cee Bailey's windows based on a number of reviews of them versus the stock Van's:
-Delete 1x: C-1005 WINDSHIELD RV-10
-Delete 1x: C-1004-L REAR LEFT WINDOW
-Delete 1x: C-1004-R RIGHT REAR WINDOW
Note: The windows for the doors (and the doors themselves) come in the finish kit. Will be deleting the windows from that kit when the time comes.

2. Heater box-- replace with stainless steel boxes from Plane Innovations. The Van's ones are aluminum that go on a stainless steel firewall, as such they are a weak spot for fire to penetrate.
-Delete 1x: TG-1010 L&R RV-10 HEAT BOXES (2)

3. Fuel valve-- replacing with aftermarket duplex valve (either Andair or Newton SPRL)
-Delete 1x: BAG 487-1 FUEL VALVE RV-10 ONLY

4. Rudder pedals-- replacing with Control Approach rudder pedal system
-Delete 2x: F-1052 RUDDER PEDAL SET
-Delete 4x*: F-1052B BRAKE SIDE PLATE
-Delete 2x: F-1052C BRAKE PDL.DBLER.PLATE
-Delete 1x: WD-1006-L-PC RUDDER PEDAL
-Delete 1x: WD-1006-R-PC RUDDER PEDAL
-Delete 1x: F-6115 CENTER BEARING BUSHING
-Delete 1x: F-8105 BRAKE HOSE 20" 8/10
-Delete 1x: PT-062x1/4x15' HI PRES BRAKE HOSE
-Delete 1x: BAG 1377-1 BRASS FITTINGS/INSERT
-Add 6x: AN822-4D ELBOW 90DEG TUBE-PIPE
*I accidentally only deleted 2, there are actually 4 of these parts.

5. Oil cooler mount-- typically ships with Finish Kit, several builders have commented that it is easier to assemble and install on to the firewall during the fuselage kit. Adding to fuselage order, will be deleting from finish kit order.
-Add 1x: VA-186 OIL COOLER MNT RV-10

Please Note: Our decisions to delete/replace parts were made very carefully, taking into account our mission, goals, aesthetics, ease of build, and most importantly safety. If you are building an RV-10 and reading this list to get ideas on what to delete from your own kit, please use this only as a reference along with doing your own personal research into what options you do and don't want. Van's will send you a waiver when deleting certain parts (such as rudder pedals) warning you about the risks of using nonstandard parts that you must sign and return before they will ship you your kit. Make sure this is something you are comfortable with before making any alterations!

During the inventorying process, I noticed a part or two relating to the stock fuel valve that were still present as a part of other BAG's (handles, spacers, etc), and also I'm not sure if I deleted *all* of the rudder pedal parts. In the end this was the best I could do after discussing with Paul at Control Approach and doing some of my own research through the plans. This list is at least "close" to complete, and I'm happy with the results so far. Of course, the real test will come when we actually start putting this thing together! Until then, we have a semi-organized 4' x 4' x 8' shelving unit chock full of parts:

"Just a few" parts to throw together!

With all that out of the way, it was time to focus back on the flaps. We riveted both the L and R flap skeletons together, which actually went quite well and was a welcome return to building after sorting through all the fuse parts.

R flap skeleton complete, ready to install leading edge skin

View of R flap skeleton at the middle, looking inboard

We clecoed the leading edges and top skins into place, and temporarily installed the flaps back on to the wings to check for straightness (we're paranoid about having twisted flaps). Looking good so far, but it seems quite clear that at this stage the assembly is "vulnerable" to twist. It seems to naturally want to sit straight, but with just a little force it can be twisted in either direction. This was an important observation, and we'll be reinstalling these onto the wings throughout the riveting process until it is rigid enough for us to be confident that we have built them straight.

Looking forward to a weekend of building!!!

Fuselage Kit arrival - inventory

The fuselage kit came today! I have to admit, probably like many other builders, this is the kit I've been most excited about getting since the beginning. It's going to be hard to finish the last couple weeks we have on the wings with this kit sitting here, but hey that's the way it goes. We were both able to get a little time off from work in the middle of the day to meet the delivery truck and get our friends Brannen and Mark over here to help push the crate up the driveway and into the garage. It was a pretty cold and rainy day, unusual for mid-May but that didn't get our spirits down one bit!

Somebody is excited!

The fuselage crate, fresh off the truck and totally undamaged, thankfully!

We couldn't resist taking two minutes to pop the top off the crate and get a first glimpse of the canopy! Sarah quickly poked her finger in there to be the first one to touch it :-)

One interesting note: the bill of lading sent with the kit lists the contents of the crate as "plastic parts", which seemed odd because there's hardly any plastic in here at all, unless you're counting the blue shrink wrap on all the aluminum. Anyway the truck driver seemed puzzled and mildly intrigued as to what was really in the crate and asked me what it was for. I told him, and his answer was simply an unmistakable look that told me I must be nuts. This is the third kit crate delivered to my home for this project, and it's the third time I've seen that look from a driver :-)

That was pretty much it until later in the day when we were both off from work and could commence unpacking and inventorying. First step was to break down the rest of the crate and split the contents up into the "subkits" that each kit ships with. A subkit is basically just a shrinkwrapped bunch of parts that are *not* necessarily related, but for some reason (I assume has to do with inventory at the factory) they get grouped together on the parts list that ships with the kit. It also makes it easier to tackle intentorying everything rather than going through a single list of hundreds of items.

Crate broken down, first full glance at all the kit parts!

First selfie inside the cabin! I think we fooled a lot of our friends on Facebook after posting this into thinking we were a lot farther along :-)

This is what we were actually "sitting" inside of

The steps! Had to give'em a whirl. Nothing to climb into yet, but that will hopefully change in a few months!

Even a first glance at the contents clearly told us we were going to need a better method of storing the many hundreds of parts this kit comes with. After looking around the garage for ideas, I grabbed a few 2x2's and 2x4's that we had on hand and got to work on a thought I had to "upcycle" (I hate that word) the fuselage crate. After about an hour with the chop saw and a drill, I had this very ugly and crudely built shelving unit, complete with staples still sticking out the back of the wood:

World's crudest shelving unit

It's ugly but it's sturdy [enough] and it works! We took a quick break to grab some dinner and then got back to work starting to inventory all the parts, stocking them into our new shelving unit as we went, and trying to keep some order to all the parts. We got through about 6 pages of the inventory list (7 subkits, I think?) but then we started getting tired and cross-eyed. Time to call it a night! We'll finish inventorying tomorrow hopefully, then get back onto finishing the flaps and the rest of the wing kit!

Current state of affairs with respect to inventorying. Lots more to go!

In addition to all the excitement above, we were able to sneak in just a bit of work on the flaps. We primed all the parts and started riveting the nose ribs and hinge brackets together:

The flap parts ready to start attaching to the spars

Still lots more riveting to do on the flaps, but it's coming along! Hopefully we'll be able to get them finished over this upcoming long weekend... we'll see!

Flaps

Flaps are coming along nicely! After work today we got right to work on D&D (deburring and dimpling). Turns out deburring all the ribs, spacers, and skins was about a 3 hour task, even with the EZ-Burrs. It seemed to go by fairly quickly though, and then I dimpled the four top and bottom skins using my trusty ol' MikeyJ-2000. Brought a heap of ribs (42 in total) into the living room with the hand squeezer and got to work dimpling while we watched a short marathon of Criminal Minds on Netflix. Before I knew it, I had a full "done" pile and an empty "to-do" pile... amazing how quick it goes when you're relaxed watching TV! So, in a burst of motivation I went back into the garage to fetch the spars and decided to dimple them on the couch too. Since they are around 8 feet long, it made for some interesting and awkward positioning on the couch. I think Sarah almost got cracked in the head at least twice with a swinging spar. She was a good sport about it though :-)

Anyway, no pics from tonight, but we now have a pile of parts to build both flaps that are basically ready for primer. We'll see if maybe I can sneak that task in over lunch tomorrow and be ready for assembly tomorrow night!

Flaps

Lots of good progress on the flaps today! Assembled both L and R flap assemblies, and finished all match/final drilling tasks. In order to keep the assemblies straight, I decided to go ahead and bolt them to the wings, and use the row of clecoes along the top of the spar to rest against the top wing skin. This row will be what makes the flaps "appear" straight, because the rivet line in this location will be right along the straight edge of the wing top skin... so what better way to ensure straightness than to put everything against the line to which it will be judged? This also helped during Page 22-5 step 3, where we had to match-drill between each pair of hinge brackets. The plans call out to use some washers as spacers to get the distance right, whereas in our case the brackets were actually bolted to the wings themselves and in the exact orientation they will be after final assembly.

Anyway, not a whole ton of pics today other than the flap assemblies after they came back off the wings after the drilling session:

L flap - outboard side

L flap - inboard side

R flap - outboard side

R flap - inboard side

After these photos were taken, we tore down the flaps back to their individual pieces for the always-anticipated task of deburring, dimpling, scuffing and priming. We were going to continue, but since it was so nice out we instead opted to have some friends over for an impromptu grill-out. Summer is coming! (and so is the fuselage kit...)

Flaps

Not a ton of progress today, this morning we had a Young Eagles event at the Marion Airport which I was scheduled to fly at (my first time doing so), but the weather had other plans for us with a low ceiling that lingered longer than was forecast. Postponed to 5/30 now. Then we were off to two back-to-back graduation parties, so by the time we were home we weren't exactly at 100% energy levels to get to building.

Still, it was actually a perfect opportunity to sit down in a chair and whittle away at the 22 flap ribs that needed to have their aft-most upper tabs removed. I did all 11 of the L ribs using aviation snips, but the R ribs needed a good set of left-handed snips, apparently my cheapo Harbor Freight set wasn't up for the task. I ended up getting creative with the dremel tool to cut them off, and then finished all 22 of them with the dremel and a sanding drum to clean up all the edges.

The aft end of a L and R flap rib with the tabs removed. This allows access to the lower tab for dimpling.

Sometimes you have to wonder, why didn't they just make the part this way at the factory and save me an hour or two of uber-boring and tedious work? It's all part of the experience, I suppose, and we'll all come out stronger in the end because of it :-)

Once the ribs were done, they could be clecoed on to the spars and be ready to accept the skins. I started on this but decided tomorrow would be a better time to finish the job. Nothing planned tomorrow except building, so should be a pretty productive day!

Flaps

Spent only maybe an hour tonight in the shop, Started with the "optional" next step which was to make lightening holes in the F-1008 spacers. I marked the three locations on just one of the four pieces and drilled a #40 pilot hole in each spot. Then I match-drilled those pilot holes to the other three spacers, and enlarged them all using a unibit on the drill press. The resulting parts look like this:

The FL-1008 spacers with lightening holes

Next we assembled the L/R center hinge subassemblies, which each contain 6 parts all sandwiched together (including the two spacers from above). Had to dig up some "Long" clecoes to be able to reach all the way through the assembly. This was the first time we used this style of clamp during the entire build so far, which was kind of cool.

Once the center hinge assemblies were together, I was able to cleco all the nose rib assemblies (1 rod end assembly, 3 hinge bracket assemblies, and 2 bare nose ribs) to the flap spar, and set the whole thing aside. I actually found that they sat nicely into their eventual homes, against the wing rear spar, so that's where they will rest tonight. Tomorrow, if there's time we'll start on the 22 ribs that need to be cut and filed!

Flaps

Yesterday we took a short trip with some friends and two other planes to fly formation to KPDC for some delicious steak at Jones Black Angus across the street from the airport. It's a beautiful, scenic part of WI at the Mississippi and Wisconsin River delta, so we both highly recommend it as an excellent meal stop if you're ever in that area! We upped the ante a little bit this time too, and walked a half mile or so further north up the road to Quality Beverage to stock up on Spotted Cow. For those who've been to Airventure at Oshkosh, you may know of Spotted Cow as a delicious local beer that is not available outside the state of WI. We couldn't pass up the opportunity to get ahold of some!

Spotted Cow bootleggers Mike, Sarah, Alec, and Erica. Our friends Jonathan and Gretchen opted to stand on the other side of the camera :-)

Formation flight into the sunset, heading back to Iowa with the goods onboard. Unlikely pairing of two Piper Warriors and a Citabria!

All I will say about trips like these: This is the reason why we love to fly! We cannot WAIT to do many more trips like this in the -10 when it's done...

Anyway, tonight in the airplane factory it was time to get back to work. We cleaned up the garage a bit and got to work laying out all the parts for the flaps. Although the design is slightly different, they still appear to be quite similar to the ailerons, perhaps even a bit more straightforward. For tonight, once we got all the parts laid out, we completed the first few steps which involved marking and drilling a few #40 holes into the flap hinge brackets as well as final-drilling the inboard and outboard nose ribs with their doubler plates. It was simple and fun work that took us through page 22-3 step 2.

The L flap hinge brackets and nose ribs starting to come together

The R flap hinge brackets and nose ribs starting to come together

Our flap workstation, complete with Spotted Cow on the table ;-)

Getting to this part made for a natural stopping point and easy evening of building. This weekend, other than a few minor plans we will be hard at work on the flaps! Fuselage kit is scheduled to arrive on Wednesday next week, let's see how close we get!