I know this. I really don't care for rolling the leading
edges. It's not fun. I used the method Van's describes in the manual. Using
3/4" and 1" aluminum tubing, with the help of a friend we rolled the
edges but it just plain sucks. It's very hard to describe how it feels, it just
doesn't work well. You really need to take your time and roll, check, remove
the pipe and use your hands, Put the pipe back on and roll some more, check,
fiddle, etc, etc. By the end, some holes line up well, some feel forced.
Ahh...I just don't enjoy this part. Took a long time to get the rudder done. I
still have to figure out a way to get the top most pop rivet set. My puller is
too big to get in there!
Monday, October 5, 2015
Sunday, October 4, 2015
Closing the rudder and finishing the trailing edge - 8 hours
Another huge day on the project. I really wanted to get the
rudder closed up. I had an idea to use a block of wood as a jig to countersink
the trailing edge wedge. I cut an angled groove in the center of a piece of oak
with the table saw. It took a few scraps and a few adjustments but I dialed it
in so that the wedge sat perfectly level in the wood block. This allows the
countersink cage to be properly supported when countersinking the holes. I
drilled a #40 hold in the center of the piece to allow the pilot of the counter
sink bit to go through. It worked better than I imagined! Hole came out
perfect! I cleaned and primed the trailing edge.
I then attached a piece of 2 1/2" x 2 1/2" angle
to the table ensuring everything was straight. I then began to match drill the
lower rudder skin into the angle, clecoing holes as I went. I drilled the end
first, then the middle, doing my best to keep it straight.
Once all the holes were drilled. I used a unibit to enlarge
every second hole to fit the squeezer.
I was ready to start the trailing edge. I cleaned the parts
with a light wipe of acetone (It does not remove the epoxy primer, but cleans
it very well). I then used the 3M double sided tape that you can buy from Van's
and applied the first layer and let it sit.
I removed the protective paper and
laid the Wedge down. Cleco'd it and let it sit for another 15min.
Then I repeated
the 3M tape. I then dabbed RTV on the stiffeners and laid the top rudder skin
on and cleco'd it along the spar.
I removed the cleco's on the trailing edge,
removed the paper off the 3M tape and pressed the top skin down and re-cleco'd
the trailing edge. I let it sit for another 15min.
While I waited for it to set, I began to rivet the elevator
closed. I riveted all along the spar, along the bottom and top.
Once it was all closed, I removed every second cleco on the
trailing edge (where I placed the holes with the unibit). Starting at center, I
dropped in a rivet and used the squeezer to half set the rivet. Counted 10 hole
over and repeated. Again, working up, then down, skipped a few holes, then
moved to the other side.
Eventually every hole was half set with the squeezer.
The results were the rudder trailing edge was darn near perfect!! I then placed
my back rivet plate under the rudder, and used the back rivet set on low low
pressure to further advance the rivets Just as the manual suggests. Working in
the similar fashion, skipping 10, each way, then go back, etc, etc. All the rivets
where nearly set, I used the mushroom head set and finished it. Perfect!!!
Friday, October 2, 2015
Finishing up Elevator Riveting - 3 Hours
Not much to report on. I spent a bunch of time completing
the riveting of the elevators. Made sure to go slow and rivet well! When I take
my time...The rivets come out amazing!
I just need to finish the elevator pop rivets. I'm waiting
for #32 and #33 drill bits to arrive. I tried using 7/64" drill bits for
the MK-319-BS rivets, but the hole is quite tight and the rivet just does not
want to sit flush in the hole. I'll wait till I have the proper drill bits to
finish.
Thursday, October 1, 2015
Closing up the Elevators - 6 Hours
I started out the evening with the intent to just do a few
things on the elevator and wound up putting in a ton of time! I used a little
RTV to attach the counterweights to the elevators with the intent to let it
dry. I then began to stew a bit on how the torquing of the bolts will go once
the RTV is dry.
It seemed much more reasonable to me to torque them while the
RTV is wet, giving the chance for the RTV to squeeze out and get a more
reliable torque out of it. So I kept going.
I then worked on my oops dimple a removed the crack with a
file, as per Van's recommendations in their email. I dimpled the proper hole
and once the rivet is installed, there will be virtually no trace of any oops.
I then got to work on building a block to squeeze the
trailing edges of the elevators. I built it exactly how van's describes and it
worked extremely well.
I then installed a 1/8" dowel at the back of the
trailing edge and used dabs of RTV where the stiffeners meet to reduce
vibration. I kept the dowel in place as I began to cleco the elevators
shut.
After I torqued the counterweight screws, I Squeezed the trailing edges
(carefully!!). I was able to get the fall off nearly perfect!
I then began to rivet the elevators closed.Every half hour or so I would turn the dowels stuck in the
elevators to make sure the RTV was not setting up on them. By the end of the
night, I pulled the downs out of the elevators and had a look. Perfect! the stiffeners
are supported by RTV but there still is a weeping hole for drainage clear thru
the elevator.
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