NorthernRV4
Well Known Member
Hi all
Just wondering if anyone has experienced crowned rib webs, no not bowed from forming. I have two ribs for my -4 empennage (HS-407/8, new from vans) that have a defined crown to the web and I can't seem to press it into shape. I even tried placing a flat block inside and driving another flat block on top and clamping but it just springs back. I fluted to remove a slight bow but the crown remains. Do I need to worry about this? The lighting in the photo makes it look more pronounced but it's probably about 1/16" gap at each edge.
![](/community/proxy.php?image=http%3A%2F%2Ffarm8.staticflickr.com%2F7377%2F10808738694_25087b6962_z.jpg&hash=5c76612403a1828d267753b36a67ee0d)
HS-407/8 by jim_soutar, on Flickr
Just wondering if anyone has experienced crowned rib webs, no not bowed from forming. I have two ribs for my -4 empennage (HS-407/8, new from vans) that have a defined crown to the web and I can't seem to press it into shape. I even tried placing a flat block inside and driving another flat block on top and clamping but it just springs back. I fluted to remove a slight bow but the crown remains. Do I need to worry about this? The lighting in the photo makes it look more pronounced but it's probably about 1/16" gap at each edge.
![](/community/proxy.php?image=http%3A%2F%2Ffarm8.staticflickr.com%2F7377%2F10808738694_25087b6962_z.jpg&hash=5c76612403a1828d267753b36a67ee0d)
HS-407/8 by jim_soutar, on Flickr