Sparky,  I'm new to RCSB and came across your post.  The picture next to "Sparky" looks like a  Northrup A-4, like the one hanging in the Smithsonian museum.  Is it?  I made drawings for the Northrup A-4 and built a 1/6 scale model.  I flew it once and it flew like the real thing, not good!  Is it a Northrup A-4, and did you build one?
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Aerostar Stan