- Joined
- Dec 2, 2008
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I'm building new elevators and rudder for an early S1-C. I needed a new rudder and tailpost anyway, and wanted a trim tab. So I modified the existing horizontal stabs to accomodate strap hinges, per Steen CAD drawings. Of course the center hinge needed to become KP4 bearings (thank Stuart for the picture of how Aviat did it...I would never have figured that out!)
1. My control horns that I have cut out of .100 sheet tend to be a bit rough along the edges and need a lot of grinding and sanding. I've found I can run the TIG torch at low amps along those edges with no filler and make a beautiful rounded edge, without a lot of finesse required. Any reason why this isn't a good idea for the control horns? It sure doesn't leave any notches for cracks to start.
2. The original S1-C drawings showed an AN4 bolt as the pivot bolt in the elevator horns, but the new dwgs show an AN3. The original downstream bolt at the elevator pushrod idler is only an AN3. Any ideas why the pivot bolt size decreased in the later plans?
3. Any reason why I shouldn't be upgrading my short-bottom-wing flatwing S1-C with the newer low-gap strap hinge/trimtab empennage components?
1. My control horns that I have cut out of .100 sheet tend to be a bit rough along the edges and need a lot of grinding and sanding. I've found I can run the TIG torch at low amps along those edges with no filler and make a beautiful rounded edge, without a lot of finesse required. Any reason why this isn't a good idea for the control horns? It sure doesn't leave any notches for cracks to start.
2. The original S1-C drawings showed an AN4 bolt as the pivot bolt in the elevator horns, but the new dwgs show an AN3. The original downstream bolt at the elevator pushrod idler is only an AN3. Any ideas why the pivot bolt size decreased in the later plans?
3. Any reason why I shouldn't be upgrading my short-bottom-wing flatwing S1-C with the newer low-gap strap hinge/trimtab empennage components?
