Started bolting the right gear weldment - 3 hours

 Checking the final fitting of the right weldment, its looking really good for the interfering rivet. 

I do notice that I have a very slight gap where the forward most flange sits against the side of the fuselage. Its very small, and it way less then the 1/16" maximum allowed by the instructions. I removed the gear and tried my best to tweek the fit to close up the gap. I did make a template for the flange, so if needed I can make a shim if needed in the future. 

As I have the bolt recipe figured out, that part of the installation went really well.    

Started bolting the left gear weldment - 3.5 hours

I need to get the weldments bolted in if I want to start on the fuel system. Can't be bent over reaching into the plane without something sturdy to put my weight on. 

I had some last minute adjustments to make on that pesky rivet interference. Fit wasn't there yet, so out the left weldment came for more filing.  Its ugly, but nobody ever see it and most important it now fits great.

Once I was ready to bolt the weldments in, it becomes very apparent that the hardware callout in the plans is not correct. The AN4-12A bolts with the AN960-416 washer is clearly too short. 

 

Even with the thin AN960-416L washer, its just too short still.

So without question I need to go up a bolt size to AN4-13A. With that, I am now battling the bolt size being just a tad too long. 

I want to be careful that I do not bottom the nuts out on the bolt...and it looks close. So, I ran the scenario of adding an additional thin AN960-416L washer.

At this point its important to note that I do not have a washer under the bolt head with this two scenarios...So then the choice is obvious that the bottom option with two washer is the one to proceed with. An AN4-13A bolt...A AN960-416L washer under the head. Through the weldment and spar. An AN960-416 washer and the nut. The result is perfect. 

 

Getting the washer slipped in behind the weldment on the one hole along the bottom was a true pain the the rear. I ended up making a washer holder out of safety wire and I was then able to slip the washer into place and then slide the bolt in. I make it sound so quick and easy....it wasn't, but it worked.

I used this washer arrangement for all of the weldment holes, except for the one hole that requires the long AN4-34A bolt. That bolt also gave me a bit of grief...it was a tad too long. I added a second AN960-416 washer and that is excellent.

So the weldments are nearly all bolted in. I will drill the sides and bolt those in at a later date.

Installing the WD-721 gear wedments - 6 hours

 Well don't be fooled..Getting the WD-721 gear weldments installed is not the easiest process for a number of reasons. A while back, I took extra time to make sure the gear weldments fit the spar and all bolt heads before the spar was riveted into the fuse. This involved opening some of the bolt holes very slightly to get everything to fit. Boy I was glad I did that then, because doing it now would be an insane pain in the butt. 

The next hurdle is getting the actual weldments into the fuse. The nutplates on the forward spar interfere and need to be removed. The gear leg holes in the bottom skin are just a tad too tight on my project so I needed to open them up slightly.

 Next fit hurdle is the fit of the downward leg on the weldment. Lots of build logs talk about how theirs interfere with the floor stiffener. Fortunately I don't have an issue with this as others do, however in order to get the welment into place you do need to get the flange slipped behind the floor stiffener. 

It does take a little effort to get the weldment in under the forward flange of the spar. You have to lift on the spar flange a little bit

Now that the weldment is in....comes the most annoying part. The weldment interferes with one of the lower rivets on the side of the fuse. I anticipated the interference when I initially fit the weldments prior to fuse assembly...I did make some notches in the weldments, but apparently not enough.

So out the weldments come....for the hundredth time. And I have to open the notches a bit more. 

 After some work with the files...I have the notches set and the weldments fit tight to the spar. 

 

The weldments are fit....but not entirely bolted to the spar yet. That involves another work session and frankly...I just don't want to look at these again for a while.

 

Misc. work and drilling the gear legs - 5 hours

 Today I works a little bit on a number of things. I checked the fit of the new fuel selector and everything is exactly as my other fuel selector. I installed new nutplates in the selector. Also, rather than using locktite on the selector fittings, I stagged (or punched) the screw heads as per the selector instructions. 

I managed to finish up the few pesky rivets in the F-721B canopy deck. Right where the F-704 bulkhead meets the canopy deck access to some rivets is interesting. I managed to slide the narrow bucking bar above the F-704 uprights (in the aft canopy deck "channel") and used a second tungsten bucking bar below the narrow bar to buck the rivet. It actually turned out really well. 

Since I am on a roll with riveting, I set the six rivets (3 per side) in the arm rest/F-705. 

 

Next...I am on to the gear legs. I want to get working on all the interior center cover area and I think by installing the gear leg weldments will give me something to support myself when I reach over and into the forward cabin. It becomes important to drill these now for the gear leg attachment bolt. Setting up on the work bench, I installed the legs into the weldments and drilled the hole with my 0.311" reamer.

Don't let this description fool you....It took a lot of time to get the weldments cleaned up enough to allow the legs to go in. Also, it was very stressful to get the bolt hole aligned properly enough to drill.