Well, I have all week off this week, and due to travel, random other activities, and general stay-at-home-dad responsibilities, I only managed to start working on the airplane today, Wednesday. My original plan was to get in 40 hours on the airplane this week, but I don’t think that’s going to happen, especially since I only managed to fit in 4 hours today. Anyway, I (we) decided that I’m going to start cleaning out some of the airplane parts from our workout room. In that light, I decided it was about time to start storing the right aileron on the right wing.
So, I pulled out the aileron plans and started studying the hardware callouts.
I did need to enlarge the weldment bolt holes to the proper size, so I grabbed an AN3 bolt and measured it’s diameter.
One of the things I have on my list of things to do is to countersink and set the lower inboard rivets on each of the aileron hinge brackets.
At first I was kind of skeptical that you needed a flush rivet head here, given all the room in the picture…
…but, after swinging the aileron through its full motion, I noticed that full up (trailing edge up) aileron has minimal clearance there.
Back to the hardware. One of my stocking stuffers from the
girlfriend FIANCÉE was this wonderful double-drive ratcheting screwdriver that you’ve all seen on the commercials recently. I have the snap-on one, which is REALLY nice, but this one is great for fast (double drive!) fastener insertions. I’ll use the snap-on when precision counts, and the Kobalt where speed is my friend.
Anyway, I used that with a socket on the end to quickly secure some of the aileron attach hardware.
I’m not sure what order these pictures are in. Here’s me cutting some of the aforementioned AT6 tubing for a spacer.
Okay, here, the ADD set in, and I needed to so something else. Time to pull out the flap seal. After edge finishing and scuffing…
Serisouly, there pictures are way out of order. Here are my rivet counts after I was done with riveting the flap seal on.
I didn’t get a good picture, but I didn’t get the rivet gun lined up right, so the edge of the set just chewed through the rivet head.
Here’s the finished product.
Next, I was trying to figure out how to line up the aileron, so instead of copying some other people’s cleco and a straight edge trick, I decided to do it by the book. Grab a straight piece of wood, drill the holes for the tooling holes in the wings, then line up the aileron with two tangential lines.
Well, kind of. Turns out, I had used one of the tooling holes as the attachment hole for the angled bracket for the wing stands.
So, I drilled two holes at the appropriate distance for an AN3 bolt, then drew my tangential lines, then enlarged the lower one to 1/4″.
But I quickly realized that with the wing nose-down, the aileron is NOT neutrally balanced. Since there is a moment on the aileron, if I clamp it to my piece of wood, it’s going to bend the piece of wood for a false reading. Looks like I’ll have to actually construct the bellcrank and pushrod.
Also, I found the bellcrank attach brackets.
I was trying to locate the AN3-6A bolts that are called out for the bellcrank attach brackets, and I couldn’t find them anywhere.
After about 30 minutes of build time wasted, I remembered that I had one more bag left. I thought this was just the close tolerance bolts, but alas, there were plenty of other AN bolts in there.
So then I spent about 20 minutes sorting though these bolts.
I have some residual confusion about bolt length, though. Here’s a known -4A and -7A.
Oh, I guess we’re jumping around in pictures again. I’ll bring up my confusion later.
I got the brass bushing out of my storage box and deburred the edges a little.
After inserting into the bellcrank….
It just barely sticks out both ends of the bellcrank as designed.
I did need to drill them out to a #21, though, for the long bolt that goes through them.
So here’s where my confusion came back in. I was supposed to use an AN3-32A bolt, but when I held up the longest bolt I could find, (and after verifying that the longest bolt was the appropriate size for the assembly), I held it up to the bolt gauge thing, and it told me it was an AN3-28A. Hmm. I’ve got my three threads on the outside of the nut, so I guess I’m okay, but I’m still confused.
Anyway, now that I’ve got the bellcrank available, I need the pushrod.
After carefully measuring and cutting, here are my two pushrods.
After drilling two 90° #30 holes…
Then, after some rivet squeezing and priming, I propped it up on my handy-dandy cleco storage units for drying.
Oh, and one more spacer for the actual attach point for the aileron.
Here’s the attachment for the aileron.
But, after I got the pushrod installed…
Here’s the bellcrank area. Looks like I dripped some primer in there.
Hey, not to far off for the first try.
4 hours total today, 3 of which were on the ailerons, 1 of which was for the flap brace. 29 rivets set, one drilled out. Yahoo!
Amid all the details about pushrods and bushings and bellcranks, a reference regarding…fiancee!! Wow! See, this is why I don’t publish my build log — how is an ordinary blog entry supposed to compete with that kind of announcement?
Congratulations! +5 rating for the big news. :)
Thanks, Stefan. We’re very excited, and I figured that any woman who could put up with me building an airplane in the garage was one that I should keep around for awhile.