Tuesday April 26th, 2005|
Started F-705 Bulkhead Construction
First thing today was to clean the garage up a bit...I couldn't stand it anymore. I spent a couple of hours doing this...it was time well spent.
After I was satisfied with the garage, I started gathering the pieces for the F-705 bulkhead. This bulkhead serves several purposes -- it serves as sort of a frame for the seat backs, it's braces the cockpit when the canopy is open and it serves as the attach point for the rear wing spars.
This long piece of bar stock serves as a spar that runs laterally across the fuselage. If you've ever seen the rear-attach points on an RV fuselage, this bar stock sticks out and is one-half of the structure that the wing rear spar inserts into.
I trimmed down the stock to the required size and then drew a centerline per the plans.
...and these are the others. Yes, these things look quite bad. These are definately getting alumiprepped and primed w/ the good stuff.
Here you see on the plans how these doublers get trimmed down. I'm going to drill everything out and then trim it down. This way I won't have to sweat the 1/4 hole in the very end that gets match-drilled. I'll just shape the taper around the hole *after* it's been drilled.
...and these little spacers go between the 705-B (spar) and the 705-C (doubler). These get cut out of 1/4 inch bar stock. In the upper-left hand side of this picture you can see where the bar gets inserted between them and a bolt (not sure about the size right now) holds it in place.
Then I started clamping everything together.
The plans really start skimping out on detail here...but it's really no big deal. For example, they tell you to draw a center line on the spar, but they never tell you what it's for. It's fairly easy to surmise that the line is for getting the alignment correct when clamping everything together.
I started getting tired and was yawning so hard that it hurt...so I decided it was time to go in (heck, it was 9:30 anyway). Until tomorrow.