Title: Bending the trim tab
Time to bend some tabs. I've read up on this and watched several videos which convinced me to deviate from how Van's tells you to bend the end tabs. Instead based on a few videos and I think an easier way to do this part, I used a piece of aluminum bar, rounded on one end to fit into the trailing edge bend of the trim tab. First order was to get the bending brake out once more and bend the trim tab to its final shape. I made sure to cleco together the rest of the elevator parts to establish the final trailing edge shape of the elevator so I would know when to stop bending on the trim tab. HERE'S WHAT I WOULD HAVE DONE DIFFERENTLY. The plans have you go ahead and bend the trim tab to its final shape on your press brake, then bend over the end tabs. Hindsight being what it is, I would wait next time around and bend the end tabs down first, then go back and bend the piece to final shape. Having said this, I don't know if having the tabs bend downward would interfere with putting the whole thing in the press brake and bending it to final shape. I guess that's why Van's has you bend it to final shape first. With the trim tab bent to final shape it was time to bend the end tabs on each end together. Instead of using the shaped wood block method that Van's recommends, I had seen a few videos where builders simply used a strip of metal with a rounded edge and bend the corners over top of that. This looked much easier and based on my results, I would say it probably is a bit easier. All in all, like all of the bending of the sheet metal, it always takes some tweaking and patience to get it to the final shape. My first bend was a bit off of where I wanted the trailing edge to end up but acceptable. I was able to just use a few different sized pieces of 2'x4's to help bend the metal using the metal bar as the bending point. I think it worked pretty well and gave good results. Again a little massaging here and there and I had the shape I wanted, not perfect but good enough. That was the bigger of the two ends. The smaller ends seemed a bit more daunting due to the small size and tight spaces. I repeated the process and just couldn't get the very trailing edge to bend over like I wanted. So I got out the rivet gun as Van's recommends and using a low pressure and a flush rivet set, hammered on each tab until they were acceptable. This technique with the rivet gun helped so much I went back and used it on the larger end as well. Again lots of massaging and using different techniques to get the bends right. In the end it wasn't that hard and I'm happy with the results. I haven't riveted anything together yet as I have to build the rest of the trim tab first so I won't know if they are acceptable until it's all built up but I feel pretty good about the results.


NOTE: This information is strictly used for the EAA Builders Log project within the EAA organization.     -     Policy     -     © Copyright 2024 Brevard Web Pro, Inc.