Skip to main content

Parts coming together

Now that my spars were ready to recieve ribs, I had a little more work to do the ribs. Ribs 5 and 9 get 1/8" deep cutouts to make room for drag-wire brackets that go between the rib and the spar. These brackets hold the end of threaded rods called drag wires and anti-drag wires which form an x-brace pattern within the wing and take any loads that would rack the wing out-of-square.
I started trying to cut these slots with an x-acto saw but it took way too long, so I tried whittling it away with an x-acto knife. This took even longer. I finally realized that I had a scroll saw in the garage and made short work of the rest of the slots. 
And then, just as I finished up the last slot I realized I'd accidentally grabbed rib 13 instead of 9.
So, another mistake needed to be corrected. Rib 9 got the appropriate slot cut and was ready to go. Rib 13 had to have the mis-cut member replaces. This entailed removing the gussets in a similar process to removing the spar plates from the last post. Nails were pulled, gussets mostly removed with a sharp chisel, and the last bit scraped away. The notched member was cut out, epoxy cleaned up, and a new one glued in with fresh gussets. A little bit of cleanup and I was able to slide all of the ribs for the left wing onto the spars for the first time. Starting to look like something! 
Time lost to the rib repairs: 2.25hrs 
Total time to date: 165.1hrs.



Comments

Popular posts from this blog

Drag wires

Progress on the airplane has been very limited as of late. It has, however, been made. After a long episode of researching and calculating I have found drag wires.   Not the drag wires the plans call for, but still. The plans want 1050 alloy steel wire to be threaded with a #6-40 thread and retained with what are essentially spoke-nipples from motorcycles wheels. The aircraft rated nipples are about $7 each and I need 24 of them. Spoke nipples are 20 to 50 cents each. We'll, I wasn't going to spend $170 on bolts, but $12 seemed reasonable, so I ordered a bunch of spoke nipples. I had intended to match the thread of the nipples with my drag wire stock, but they are just irregular enough that I couldn't find a thread that matched and it seemed like sending wires out to have the correct thread rolled on wouldn't be worth the effort. So, despite having bought my spoke nipples, I abandoned the idea of using them. Enter the Baby Great Lakes. I researched drag wires and alt...

Where to start?

So, where does one start when building an airplane?   The answer changes from person to person. The kernel of inspiration to build an airplane was there, as I mentioned in the last post, from the time and effort it took to build the Spirit. But what plane? I looked at the trusty Pietenpol, but the size of the cockpits and the useful load left me wanting for something more. I looked at the Double Eagle and the Airbike, but my girlfriend didn't like how open they were. Finally, I made a list of what I thought I wanted in an airplane, reproduced here.  -High wing monoplane (biplanes mean building 4 wings)  -Taildragger w/tailwheel  -Fabric wings and stab.  -Aluminum tube or wood construction, maybe steel  -Inexpensive to build  -Inexpensive to operate  -Single carb engine.  -Aircooled?  -Two seats  -Mostly enclosed cockpit (not a breezy)  -minimal systems  -AOA/reserve lift guage  -Amphibious a plus ...

Fittings. How fitting.

  Not much has happened on the Ace this year. The winter was long and spring has been very cold, so I spent a long time waiting for the garage to warm up. Now that there's a little heat down there I've been making some headway on the next step of my wing build: fittings. I copied the parts off the plans into CAD and then printed them onto cardstock to use as patterns when laying fittings out on the steel stock.    First I tackled the brackets that will hold the pulleys for the aileron cables. I have a lot of extra material in case I had to remake these. The next step was to bend up my fittings. There is one fitting that mounts to the forward side of the strut which gets bent to a 90° angle. The fitting which mounts to the aft side of the spar gets bent at about an 85° angle. I forget the exact number, but don't feel like looking it up at the moment. Next I cut out the aileron control horns. My Harbor Freight porta-band chucked into my vice works well for cutting th...