Dear Guys
I have noticed that the three outermost main ribs (W-309) have a reduce overlap on the flanges between the bottom main rib and the rear spar when compared to the other main ribs (W-339). See attached photos. This may make it very difficult to achieve the required ED when riveting the skins on to the combined rear spar/Rib flange.
The outer ribs (W-309) have to be fractionally longer due the 0.125 inch W-330C doubler plate that ends at about station 80 . It seems that the additional length was achieved by making the rear of the main ribs a little longer but the bottom flange length was not increased. See photo below.
To myself, the W- 309 ribs should be longer at the leading edge and the trailing edge identical to the W-339 ribs.
I have brought this to the attention of Vans and am expecting a reply next week.
Thoughts any one?
https://www.flickr.com/photos/157411418@N02/31770926117/in/dateposted-public/
https://www.flickr.com/photos/157411418@N02/32837493278/in/dateposted-public/
I have noticed that the three outermost main ribs (W-309) have a reduce overlap on the flanges between the bottom main rib and the rear spar when compared to the other main ribs (W-339). See attached photos. This may make it very difficult to achieve the required ED when riveting the skins on to the combined rear spar/Rib flange.
The outer ribs (W-309) have to be fractionally longer due the 0.125 inch W-330C doubler plate that ends at about station 80 . It seems that the additional length was achieved by making the rear of the main ribs a little longer but the bottom flange length was not increased. See photo below.
To myself, the W- 309 ribs should be longer at the leading edge and the trailing edge identical to the W-339 ribs.
I have brought this to the attention of Vans and am expecting a reply next week.
Thoughts any one?
https://www.flickr.com/photos/157411418@N02/31770926117/in/dateposted-public/
https://www.flickr.com/photos/157411418@N02/32837493278/in/dateposted-public/