Showing posts with label leading edge. Show all posts
Showing posts with label leading edge. Show all posts

Friday, August 13, 2010

I'm a Right Winger??

To finish the wing you need to bend the trailing edge of the leading edge cuff to keep it from wearing on the fabric. Take 2 pieces of 1/2" x 13" x 3" wood, and bolt them together while sandwiching a washer in between. Remember my scrap wood bin?



This leaves a gap to insert the cuff into.



Now mark the center of each bay, and mark 1/2" back from the edge of the crimper.



Bend the trailing edge of the cuff in each bay (top and bottom) down about 30-45 degrees.



By the time I finished the crimper had gotten trimmed a bit to fit into some of the bays.



A couple of the bays on the bottom are still so tight you have no choice but to use a hand crimper.



Not quite as smooth though....



The top came out very nice, which is a good way to end this phase of the wing construction.



About that time a buddy stopped by and  gave me a head's up that TSA was wandering around the airport, looking for people who weren't wearing their SIDA badges and generally being TSA. (Two Strolling Around) It was a good time to call it a night, and as I watched the gate close behind me I saw them walking down the ramp by my hangar. Timing is everything.

Until it's time to cover, the right wing is done until next summer. For a few days I'll just have to lean that way.

Wednesday, August 11, 2010

Leading it on

First, a couple people have asked how I have so much time to work on the SeaRey. Am I retired? Lazy? Living the life of a rich airline pilot?

The answer is None of the above. Back in March I had a mishap with my right knee, the same knee I had surgery on in 2005. At this point it's been determined that reopening the knee will cause more damage than acceptable, and we're on a long term physical therapy program to try to bring it back. I've talked things over with my physical therapist and he says that as long as I'm not kneeling on it or climbing ladders, working in the hangar is Ok and in some cases good for the knee. Glad I put in that wood floor.


So let's finish this wing.

Next was to drill the inter-bay holes for the cuff supports.




And work on the wingtip. The guys on the tech site sent me some images of how much should be cut off and I used that as a guide. Sure enough, when I trimmed it as far back as they suggested it fit fine.


And I filed it down for a smooth edge.



By this time the poor wing looks like it's a cleco porcupine.



45 minutes and a double handful of stainless steel rivets later...




Next will be to install the front strut mount plate. To do so you first make a template off the real one.



I used a bit of scrap wood I had in my scrap wood bin at home.



While my hangar is spacious, my home workshop is anything but.

Monday, August 9, 2010

With the underside exposed I was able to trim the lower rear wing cuff and install the wing/strut plate. It will get removed when it's time for covering next summer.



The leading edge wing cuff gets put in position and (gently) tightened down with ratchet straps on every other rib.

From the inside of the wing trace the outline of the ribs and cuff supports.


The cuff is taken off the wing, and each rib is marked at 0.5", 1.5" (ribs 5-8 only), 3", and 5.5". I freehand guesstimated the centerline of my ribs and only one came out less than perfect but next time I'll use a small, flexible, see-through ruler for better centerline alignment.



Note that the 3" mark should correspond to the wing cuff support angle and the 1.5" mark should correspond to the secondary wing cuff support angle. My cuffs were about .75" too far aft and I had to move them forward to correspond to the marks.





Flip the cuff over and mark the lower part at 0.5" and 1.5".



Drill and deburr the marks, then remount the cuff. Start at the front (top) of the wing, drill and cleco the ribs (and the cuff underneath) and work aft. I found it best to start on every other rib where they were held down with a strap...



Then come back and do the ribs in between.



And work your way aft. Before you drill where the cuff support is make sure it hasn't shifted position and is still under the holes you drilled in the cuff.



Then reverse and drill/cleco the bottom.



The cuff at the wingtip will get trimmed and fit next.