Those are reinforced weldements ….NOT the new style …..RVATOR had an article from VANS on that problem and fix on older style weldments ….I have lots of pictures of broken older weldments and the fix but can’t post them sorry
I also suspected that those are reinforced weldments. Old style with a beefy bracket on top. Is this modification good enough in the long run?
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RV-4. O-360A1D/180 with Pacesetter 200 Prop.